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7db7d9f3 | 1 | // SPDX-License-Identifier: GPL-2.0 |
cfa55c6d | 2 | /* Copyright (C) B.A.T.M.A.N. contributors: |
c6c8fea2 | 3 | * |
35c133a0 | 4 | * Marek Lindner, Simon Wunderlich, Antonio Quartulli |
c6c8fea2 SE |
5 | */ |
6 | ||
c6c8fea2 | 7 | #include "translation-table.h" |
1e2c2a4f SE |
8 | #include "main.h" |
9 | ||
10 | #include <linux/atomic.h> | |
ac4eebd4 | 11 | #include <linux/bitops.h> |
ecc36f5e | 12 | #include <linux/build_bug.h> |
1e2c2a4f | 13 | #include <linux/byteorder/generic.h> |
86452f81 | 14 | #include <linux/cache.h> |
1e2c2a4f SE |
15 | #include <linux/compiler.h> |
16 | #include <linux/crc32c.h> | |
17 | #include <linux/errno.h> | |
18 | #include <linux/etherdevice.h> | |
b92b94ac | 19 | #include <linux/gfp.h> |
1e2c2a4f | 20 | #include <linux/if_ether.h> |
86452f81 | 21 | #include <linux/init.h> |
1e2c2a4f SE |
22 | #include <linux/jhash.h> |
23 | #include <linux/jiffies.h> | |
24 | #include <linux/kernel.h> | |
6e8ef69d | 25 | #include <linux/kref.h> |
1e2c2a4f SE |
26 | #include <linux/list.h> |
27 | #include <linux/lockdep.h> | |
3a64469e | 28 | #include <linux/net.h> |
1e2c2a4f | 29 | #include <linux/netdevice.h> |
d34f0550 | 30 | #include <linux/netlink.h> |
1e2c2a4f SE |
31 | #include <linux/rculist.h> |
32 | #include <linux/rcupdate.h> | |
d34f0550 | 33 | #include <linux/skbuff.h> |
1e2c2a4f SE |
34 | #include <linux/slab.h> |
35 | #include <linux/spinlock.h> | |
36 | #include <linux/stddef.h> | |
37 | #include <linux/string.h> | |
38 | #include <linux/workqueue.h> | |
d34f0550 MS |
39 | #include <net/genetlink.h> |
40 | #include <net/netlink.h> | |
41 | #include <net/sock.h> | |
fec149f5 | 42 | #include <uapi/linux/batadv_packet.h> |
d34f0550 | 43 | #include <uapi/linux/batman_adv.h> |
1e2c2a4f SE |
44 | |
45 | #include "bridge_loop_avoidance.h" | |
32ae9b22 | 46 | #include "hard-interface.h" |
c6c8fea2 | 47 | #include "hash.h" |
ba412080 | 48 | #include "log.h" |
d34f0550 | 49 | #include "netlink.h" |
1e2c2a4f | 50 | #include "originator.h" |
1e2c2a4f | 51 | #include "soft-interface.h" |
1f8dce49 | 52 | #include "tvlv.h" |
a73105b8 | 53 | |
86452f81 SE |
54 | static struct kmem_cache *batadv_tl_cache __read_mostly; |
55 | static struct kmem_cache *batadv_tg_cache __read_mostly; | |
56 | static struct kmem_cache *batadv_tt_orig_cache __read_mostly; | |
57 | static struct kmem_cache *batadv_tt_change_cache __read_mostly; | |
58 | static struct kmem_cache *batadv_tt_req_cache __read_mostly; | |
59 | static struct kmem_cache *batadv_tt_roam_cache __read_mostly; | |
60 | ||
dec05074 AQ |
61 | /* hash class keys */ |
62 | static struct lock_class_key batadv_tt_local_hash_lock_class_key; | |
63 | static struct lock_class_key batadv_tt_global_hash_lock_class_key; | |
64 | ||
6b5e971a | 65 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 66 | unsigned short vid, |
56303d34 | 67 | struct batadv_orig_node *orig_node); |
a513088d SE |
68 | static void batadv_tt_purge(struct work_struct *work); |
69 | static void | |
56303d34 | 70 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); |
30cfd02b AQ |
71 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
72 | struct batadv_orig_node *orig_node, | |
73 | const unsigned char *addr, | |
c018ad3d AQ |
74 | unsigned short vid, const char *message, |
75 | bool roaming); | |
c6c8fea2 | 76 | |
62fe710f | 77 | /** |
7e9a8c2c | 78 | * batadv_compare_tt() - check if two TT entries are the same |
d15cd622 AQ |
79 | * @node: the list element pointer of the first TT entry |
80 | * @data2: pointer to the tt_common_entry of the second TT entry | |
62fe710f | 81 | * |
d15cd622 AQ |
82 | * Compare the MAC address and the VLAN ID of the two TT entries and check if |
83 | * they are the same TT client. | |
4b426b10 | 84 | * Return: true if the two TT clients are the same, false otherwise |
62fe710f | 85 | */ |
4b426b10 | 86 | static bool batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 87 | { |
56303d34 | 88 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 89 | hash_entry); |
4c718958 ML |
90 | const struct batadv_tt_common_entry *tt1 = data1; |
91 | const struct batadv_tt_common_entry *tt2 = data2; | |
7aadf889 | 92 | |
4c718958 | 93 | return (tt1->vid == tt2->vid) && batadv_compare_eth(data1, data2); |
7aadf889 ML |
94 | } |
95 | ||
c018ad3d | 96 | /** |
7e9a8c2c | 97 | * batadv_choose_tt() - return the index of the tt entry in the hash table |
c018ad3d AQ |
98 | * @data: pointer to the tt_common_entry object to map |
99 | * @size: the size of the hash table | |
100 | * | |
62fe710f | 101 | * Return: the hash index where the object represented by 'data' should be |
c018ad3d AQ |
102 | * stored at. |
103 | */ | |
6b5e971a | 104 | static inline u32 batadv_choose_tt(const void *data, u32 size) |
c018ad3d AQ |
105 | { |
106 | struct batadv_tt_common_entry *tt; | |
6b5e971a | 107 | u32 hash = 0; |
c018ad3d AQ |
108 | |
109 | tt = (struct batadv_tt_common_entry *)data; | |
36fd61cb SE |
110 | hash = jhash(&tt->addr, ETH_ALEN, hash); |
111 | hash = jhash(&tt->vid, sizeof(tt->vid), hash); | |
c018ad3d AQ |
112 | |
113 | return hash % size; | |
114 | } | |
115 | ||
116 | /** | |
7e9a8c2c | 117 | * batadv_tt_hash_find() - look for a client in the given hash table |
c018ad3d AQ |
118 | * @hash: the hash table to search |
119 | * @addr: the mac address of the client to look for | |
120 | * @vid: VLAN identifier | |
121 | * | |
62fe710f | 122 | * Return: a pointer to the tt_common struct belonging to the searched client if |
c018ad3d AQ |
123 | * found, NULL otherwise. |
124 | */ | |
56303d34 | 125 | static struct batadv_tt_common_entry * |
6b5e971a | 126 | batadv_tt_hash_find(struct batadv_hashtable *hash, const u8 *addr, |
c018ad3d | 127 | unsigned short vid) |
7aadf889 | 128 | { |
7aadf889 | 129 | struct hlist_head *head; |
c018ad3d | 130 | struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL; |
6b5e971a | 131 | u32 index; |
7aadf889 ML |
132 | |
133 | if (!hash) | |
134 | return NULL; | |
135 | ||
8fdd0153 | 136 | ether_addr_copy(to_search.addr, addr); |
c018ad3d AQ |
137 | to_search.vid = vid; |
138 | ||
139 | index = batadv_choose_tt(&to_search, hash->size); | |
7aadf889 ML |
140 | head = &hash->table[index]; |
141 | ||
142 | rcu_read_lock(); | |
c018ad3d AQ |
143 | hlist_for_each_entry_rcu(tt, head, hash_entry) { |
144 | if (!batadv_compare_eth(tt, addr)) | |
145 | continue; | |
146 | ||
147 | if (tt->vid != vid) | |
7aadf889 ML |
148 | continue; |
149 | ||
92dcdf09 | 150 | if (!kref_get_unless_zero(&tt->refcount)) |
7683fdc1 AQ |
151 | continue; |
152 | ||
c018ad3d | 153 | tt_tmp = tt; |
7aadf889 ML |
154 | break; |
155 | } | |
156 | rcu_read_unlock(); | |
157 | ||
c018ad3d | 158 | return tt_tmp; |
7aadf889 ML |
159 | } |
160 | ||
c018ad3d | 161 | /** |
7e9a8c2c | 162 | * batadv_tt_local_hash_find() - search the local table for a given client |
c018ad3d AQ |
163 | * @bat_priv: the bat priv with all the soft interface information |
164 | * @addr: the mac address of the client to look for | |
165 | * @vid: VLAN identifier | |
166 | * | |
62fe710f | 167 | * Return: a pointer to the corresponding tt_local_entry struct if the client is |
c018ad3d AQ |
168 | * found, NULL otherwise. |
169 | */ | |
56303d34 | 170 | static struct batadv_tt_local_entry * |
6b5e971a | 171 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 172 | unsigned short vid) |
7aadf889 | 173 | { |
56303d34 SE |
174 | struct batadv_tt_common_entry *tt_common_entry; |
175 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 176 | |
c018ad3d AQ |
177 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr, |
178 | vid); | |
48100bac AQ |
179 | if (tt_common_entry) |
180 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
181 | struct batadv_tt_local_entry, |
182 | common); | |
48100bac AQ |
183 | return tt_local_entry; |
184 | } | |
7aadf889 | 185 | |
c018ad3d | 186 | /** |
7e9a8c2c | 187 | * batadv_tt_global_hash_find() - search the global table for a given client |
c018ad3d AQ |
188 | * @bat_priv: the bat priv with all the soft interface information |
189 | * @addr: the mac address of the client to look for | |
190 | * @vid: VLAN identifier | |
191 | * | |
62fe710f | 192 | * Return: a pointer to the corresponding tt_global_entry struct if the client |
c018ad3d AQ |
193 | * is found, NULL otherwise. |
194 | */ | |
32e72744 | 195 | struct batadv_tt_global_entry * |
6b5e971a | 196 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 197 | unsigned short vid) |
48100bac | 198 | { |
56303d34 SE |
199 | struct batadv_tt_common_entry *tt_common_entry; |
200 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 201 | |
c018ad3d AQ |
202 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr, |
203 | vid); | |
48100bac AQ |
204 | if (tt_common_entry) |
205 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
206 | struct batadv_tt_global_entry, |
207 | common); | |
48100bac | 208 | return tt_global_entry; |
7aadf889 ML |
209 | } |
210 | ||
86452f81 | 211 | /** |
7e9a8c2c | 212 | * batadv_tt_local_entry_free_rcu() - free the tt_local_entry |
86452f81 SE |
213 | * @rcu: rcu pointer of the tt_local_entry |
214 | */ | |
215 | static void batadv_tt_local_entry_free_rcu(struct rcu_head *rcu) | |
216 | { | |
217 | struct batadv_tt_local_entry *tt_local_entry; | |
218 | ||
219 | tt_local_entry = container_of(rcu, struct batadv_tt_local_entry, | |
220 | common.rcu); | |
221 | ||
222 | kmem_cache_free(batadv_tl_cache, tt_local_entry); | |
223 | } | |
224 | ||
92dcdf09 | 225 | /** |
7e9a8c2c | 226 | * batadv_tt_local_entry_release() - release tt_local_entry from lists and queue |
92dcdf09 SE |
227 | * for free after rcu grace period |
228 | * @ref: kref pointer of the nc_node | |
229 | */ | |
230 | static void batadv_tt_local_entry_release(struct kref *ref) | |
231 | { | |
232 | struct batadv_tt_local_entry *tt_local_entry; | |
233 | ||
234 | tt_local_entry = container_of(ref, struct batadv_tt_local_entry, | |
235 | common.refcount); | |
236 | ||
a33d970d SE |
237 | batadv_softif_vlan_put(tt_local_entry->vlan); |
238 | ||
86452f81 | 239 | call_rcu(&tt_local_entry->common.rcu, batadv_tt_local_entry_free_rcu); |
92dcdf09 SE |
240 | } |
241 | ||
242 | /** | |
7e9a8c2c | 243 | * batadv_tt_local_entry_put() - decrement the tt_local_entry refcounter and |
92dcdf09 SE |
244 | * possibly release it |
245 | * @tt_local_entry: tt_local_entry to be free'd | |
246 | */ | |
a513088d | 247 | static void |
95c0db90 | 248 | batadv_tt_local_entry_put(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 249 | { |
6340dcbd SE |
250 | if (!tt_local_entry) |
251 | return; | |
252 | ||
92dcdf09 SE |
253 | kref_put(&tt_local_entry->common.refcount, |
254 | batadv_tt_local_entry_release); | |
7683fdc1 AQ |
255 | } |
256 | ||
86452f81 | 257 | /** |
7e9a8c2c | 258 | * batadv_tt_global_entry_free_rcu() - free the tt_global_entry |
86452f81 SE |
259 | * @rcu: rcu pointer of the tt_global_entry |
260 | */ | |
261 | static void batadv_tt_global_entry_free_rcu(struct rcu_head *rcu) | |
262 | { | |
263 | struct batadv_tt_global_entry *tt_global_entry; | |
264 | ||
265 | tt_global_entry = container_of(rcu, struct batadv_tt_global_entry, | |
266 | common.rcu); | |
267 | ||
268 | kmem_cache_free(batadv_tg_cache, tt_global_entry); | |
269 | } | |
270 | ||
21026059 | 271 | /** |
7e9a8c2c SE |
272 | * batadv_tt_global_entry_release() - release tt_global_entry from lists and |
273 | * queue for free after rcu grace period | |
92dcdf09 SE |
274 | * @ref: kref pointer of the nc_node |
275 | */ | |
6340dcbd | 276 | void batadv_tt_global_entry_release(struct kref *ref) |
92dcdf09 SE |
277 | { |
278 | struct batadv_tt_global_entry *tt_global_entry; | |
279 | ||
280 | tt_global_entry = container_of(ref, struct batadv_tt_global_entry, | |
281 | common.refcount); | |
282 | ||
283 | batadv_tt_global_del_orig_list(tt_global_entry); | |
86452f81 SE |
284 | |
285 | call_rcu(&tt_global_entry->common.rcu, batadv_tt_global_entry_free_rcu); | |
92dcdf09 SE |
286 | } |
287 | ||
1d8ab8d3 | 288 | /** |
7e9a8c2c | 289 | * batadv_tt_global_hash_count() - count the number of orig entries |
d15cd622 | 290 | * @bat_priv: the bat priv with all the soft interface information |
1d8ab8d3 LL |
291 | * @addr: the mac address of the client to count entries for |
292 | * @vid: VLAN identifier | |
293 | * | |
62fe710f | 294 | * Return: the number of originators advertising the given address/data |
bccb48c8 | 295 | * (excluding our self). |
1d8ab8d3 LL |
296 | */ |
297 | int batadv_tt_global_hash_count(struct batadv_priv *bat_priv, | |
6b5e971a | 298 | const u8 *addr, unsigned short vid) |
1d8ab8d3 LL |
299 | { |
300 | struct batadv_tt_global_entry *tt_global_entry; | |
301 | int count; | |
302 | ||
303 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
304 | if (!tt_global_entry) | |
305 | return 0; | |
306 | ||
307 | count = atomic_read(&tt_global_entry->orig_list_count); | |
5dafd8a6 | 308 | batadv_tt_global_entry_put(tt_global_entry); |
1d8ab8d3 LL |
309 | |
310 | return count; | |
311 | } | |
312 | ||
7ea7b4a1 | 313 | /** |
7e9a8c2c SE |
314 | * batadv_tt_local_size_mod() - change the size by v of the local table |
315 | * identified by vid | |
7ea7b4a1 AQ |
316 | * @bat_priv: the bat priv with all the soft interface information |
317 | * @vid: the VLAN identifier of the sub-table to change | |
318 | * @v: the amount to sum to the local table size | |
319 | */ | |
320 | static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, | |
321 | unsigned short vid, int v) | |
322 | { | |
323 | struct batadv_softif_vlan *vlan; | |
324 | ||
325 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
326 | if (!vlan) | |
327 | return; | |
328 | ||
329 | atomic_add(v, &vlan->tt.num_entries); | |
330 | ||
9c3bf081 | 331 | batadv_softif_vlan_put(vlan); |
7ea7b4a1 AQ |
332 | } |
333 | ||
334 | /** | |
7e9a8c2c SE |
335 | * batadv_tt_local_size_inc() - increase by one the local table size for the |
336 | * given vid | |
7ea7b4a1 AQ |
337 | * @bat_priv: the bat priv with all the soft interface information |
338 | * @vid: the VLAN identifier | |
339 | */ | |
340 | static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, | |
341 | unsigned short vid) | |
342 | { | |
343 | batadv_tt_local_size_mod(bat_priv, vid, 1); | |
344 | } | |
345 | ||
346 | /** | |
7e9a8c2c SE |
347 | * batadv_tt_local_size_dec() - decrease by one the local table size for the |
348 | * given vid | |
7ea7b4a1 AQ |
349 | * @bat_priv: the bat priv with all the soft interface information |
350 | * @vid: the VLAN identifier | |
351 | */ | |
352 | static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, | |
353 | unsigned short vid) | |
354 | { | |
355 | batadv_tt_local_size_mod(bat_priv, vid, -1); | |
356 | } | |
357 | ||
358 | /** | |
7e9a8c2c | 359 | * batadv_tt_global_size_mod() - change the size by v of the global table |
d15cd622 AQ |
360 | * for orig_node identified by vid |
361 | * @orig_node: the originator for which the table has to be modified | |
7ea7b4a1 AQ |
362 | * @vid: the VLAN identifier |
363 | * @v: the amount to sum to the global table size | |
364 | */ | |
365 | static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, | |
366 | unsigned short vid, int v) | |
367 | { | |
368 | struct batadv_orig_node_vlan *vlan; | |
369 | ||
370 | vlan = batadv_orig_node_vlan_new(orig_node, vid); | |
371 | if (!vlan) | |
372 | return; | |
373 | ||
374 | if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { | |
375 | spin_lock_bh(&orig_node->vlan_list_lock); | |
3db15209 SE |
376 | if (!hlist_unhashed(&vlan->list)) { |
377 | hlist_del_init_rcu(&vlan->list); | |
21754e25 | 378 | batadv_orig_node_vlan_put(vlan); |
3db15209 | 379 | } |
7ea7b4a1 | 380 | spin_unlock_bh(&orig_node->vlan_list_lock); |
7ea7b4a1 AQ |
381 | } |
382 | ||
21754e25 | 383 | batadv_orig_node_vlan_put(vlan); |
7ea7b4a1 AQ |
384 | } |
385 | ||
386 | /** | |
7e9a8c2c | 387 | * batadv_tt_global_size_inc() - increase by one the global table size for the |
7ea7b4a1 AQ |
388 | * given vid |
389 | * @orig_node: the originator which global table size has to be decreased | |
390 | * @vid: the vlan identifier | |
391 | */ | |
392 | static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, | |
393 | unsigned short vid) | |
394 | { | |
395 | batadv_tt_global_size_mod(orig_node, vid, 1); | |
396 | } | |
397 | ||
398 | /** | |
7e9a8c2c | 399 | * batadv_tt_global_size_dec() - decrease by one the global table size for the |
7ea7b4a1 AQ |
400 | * given vid |
401 | * @orig_node: the originator which global table size has to be decreased | |
402 | * @vid: the vlan identifier | |
403 | */ | |
404 | static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, | |
405 | unsigned short vid) | |
406 | { | |
407 | batadv_tt_global_size_mod(orig_node, vid, -1); | |
408 | } | |
409 | ||
86452f81 | 410 | /** |
7e9a8c2c | 411 | * batadv_tt_orig_list_entry_free_rcu() - free the orig_entry |
86452f81 SE |
412 | * @rcu: rcu pointer of the orig_entry |
413 | */ | |
414 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) | |
415 | { | |
416 | struct batadv_tt_orig_list_entry *orig_entry; | |
417 | ||
418 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); | |
419 | ||
420 | kmem_cache_free(batadv_tt_orig_cache, orig_entry); | |
421 | } | |
422 | ||
42eff6a6 | 423 | /** |
7e9a8c2c | 424 | * batadv_tt_orig_list_entry_release() - release tt orig entry from lists and |
42eff6a6 | 425 | * queue for free after rcu grace period |
6e8ef69d | 426 | * @ref: kref pointer of the tt orig entry |
42eff6a6 | 427 | */ |
6e8ef69d | 428 | static void batadv_tt_orig_list_entry_release(struct kref *ref) |
42eff6a6 | 429 | { |
6e8ef69d SE |
430 | struct batadv_tt_orig_list_entry *orig_entry; |
431 | ||
432 | orig_entry = container_of(ref, struct batadv_tt_orig_list_entry, | |
433 | refcount); | |
434 | ||
5d967310 | 435 | batadv_orig_node_put(orig_entry->orig_node); |
86452f81 | 436 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
42eff6a6 SE |
437 | } |
438 | ||
6e8ef69d | 439 | /** |
7e9a8c2c | 440 | * batadv_tt_orig_list_entry_put() - decrement the tt orig entry refcounter and |
7e2366c6 | 441 | * possibly release it |
6e8ef69d SE |
442 | * @orig_entry: tt orig entry to be free'd |
443 | */ | |
a513088d | 444 | static void |
7e2366c6 | 445 | batadv_tt_orig_list_entry_put(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 446 | { |
6340dcbd SE |
447 | if (!orig_entry) |
448 | return; | |
449 | ||
6e8ef69d | 450 | kref_put(&orig_entry->refcount, batadv_tt_orig_list_entry_release); |
7683fdc1 AQ |
451 | } |
452 | ||
3abe4adb | 453 | /** |
7e9a8c2c | 454 | * batadv_tt_local_event() - store a local TT event (ADD/DEL) |
3abe4adb AQ |
455 | * @bat_priv: the bat priv with all the soft interface information |
456 | * @tt_local_entry: the TT entry involved in the event | |
457 | * @event_flags: flags to store in the event structure | |
458 | */ | |
56303d34 | 459 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb | 460 | struct batadv_tt_local_entry *tt_local_entry, |
6b5e971a | 461 | u8 event_flags) |
a73105b8 | 462 | { |
56303d34 | 463 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb | 464 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
6b5e971a | 465 | u8 flags = common->flags | event_flags; |
3b643de5 AQ |
466 | bool event_removed = false; |
467 | bool del_op_requested, del_op_entry; | |
a73105b8 | 468 | |
86452f81 | 469 | tt_change_node = kmem_cache_alloc(batadv_tt_change_cache, GFP_ATOMIC); |
a73105b8 AQ |
470 | if (!tt_change_node) |
471 | return; | |
472 | ||
ff66c975 | 473 | tt_change_node->change.flags = flags; |
ca663046 AQ |
474 | memset(tt_change_node->change.reserved, 0, |
475 | sizeof(tt_change_node->change.reserved)); | |
8fdd0153 | 476 | ether_addr_copy(tt_change_node->change.addr, common->addr); |
c018ad3d | 477 | tt_change_node->change.vid = htons(common->vid); |
a73105b8 | 478 | |
acd34afa | 479 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
480 | |
481 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
482 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
483 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 484 | list) { |
3abe4adb | 485 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
486 | continue; |
487 | ||
488 | /* DEL+ADD in the same orig interval have no effect and can be | |
489 | * removed to avoid silly behaviour on the receiver side. The | |
490 | * other way around (ADD+DEL) can happen in case of roaming of | |
491 | * a client still in the NEW state. Roaming of NEW clients is | |
492 | * now possible due to automatically recognition of "temporary" | |
493 | * clients | |
494 | */ | |
acd34afa | 495 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
496 | if (!del_op_requested && del_op_entry) |
497 | goto del; | |
498 | if (del_op_requested && !del_op_entry) | |
499 | goto del; | |
3c4f7ab6 AQ |
500 | |
501 | /* this is a second add in the same originator interval. It | |
502 | * means that flags have been changed: update them! | |
503 | */ | |
504 | if (!del_op_requested && !del_op_entry) | |
505 | entry->change.flags = flags; | |
506 | ||
3b643de5 AQ |
507 | continue; |
508 | del: | |
509 | list_del(&entry->list); | |
86452f81 SE |
510 | kmem_cache_free(batadv_tt_change_cache, entry); |
511 | kmem_cache_free(batadv_tt_change_cache, tt_change_node); | |
3b643de5 AQ |
512 | event_removed = true; |
513 | goto unlock; | |
514 | } | |
515 | ||
a73105b8 | 516 | /* track the change in the OGMinterval list */ |
807736f6 | 517 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
518 | |
519 | unlock: | |
807736f6 | 520 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 521 | |
3b643de5 | 522 | if (event_removed) |
807736f6 | 523 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 524 | else |
807736f6 | 525 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
526 | } |
527 | ||
335fbe0f | 528 | /** |
7e9a8c2c | 529 | * batadv_tt_len() - compute length in bytes of given number of tt changes |
335fbe0f ML |
530 | * @changes_num: number of tt changes |
531 | * | |
62fe710f | 532 | * Return: computed length in bytes. |
335fbe0f ML |
533 | */ |
534 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 535 | { |
335fbe0f | 536 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
537 | } |
538 | ||
298e6e68 | 539 | /** |
7e9a8c2c | 540 | * batadv_tt_entries() - compute the number of entries fitting in tt_len bytes |
298e6e68 AQ |
541 | * @tt_len: available space |
542 | * | |
62fe710f | 543 | * Return: the number of entries. |
298e6e68 | 544 | */ |
6b5e971a | 545 | static u16 batadv_tt_entries(u16 tt_len) |
298e6e68 AQ |
546 | { |
547 | return tt_len / batadv_tt_len(1); | |
548 | } | |
549 | ||
a19d3d85 | 550 | /** |
7e9a8c2c SE |
551 | * batadv_tt_local_table_transmit_size() - calculates the local translation |
552 | * table size when transmitted over the air | |
a19d3d85 ML |
553 | * @bat_priv: the bat priv with all the soft interface information |
554 | * | |
62fe710f | 555 | * Return: local translation table size in bytes. |
a19d3d85 ML |
556 | */ |
557 | static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv) | |
558 | { | |
4f248cff SE |
559 | u16 num_vlan = 0; |
560 | u16 tt_local_entries = 0; | |
a19d3d85 ML |
561 | struct batadv_softif_vlan *vlan; |
562 | int hdr_size; | |
563 | ||
564 | rcu_read_lock(); | |
565 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
566 | num_vlan++; | |
567 | tt_local_entries += atomic_read(&vlan->tt.num_entries); | |
568 | } | |
569 | rcu_read_unlock(); | |
570 | ||
571 | /* header size of tvlv encapsulated tt response payload */ | |
572 | hdr_size = sizeof(struct batadv_unicast_tvlv_packet); | |
573 | hdr_size += sizeof(struct batadv_tvlv_hdr); | |
574 | hdr_size += sizeof(struct batadv_tvlv_tt_data); | |
575 | hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data); | |
576 | ||
577 | return hdr_size + batadv_tt_len(tt_local_entries); | |
578 | } | |
579 | ||
56303d34 | 580 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 581 | { |
807736f6 | 582 | if (bat_priv->tt.local_hash) |
5346c35e | 583 | return 0; |
c6c8fea2 | 584 | |
807736f6 | 585 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 586 | |
807736f6 | 587 | if (!bat_priv->tt.local_hash) |
5346c35e | 588 | return -ENOMEM; |
c6c8fea2 | 589 | |
dec05074 AQ |
590 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
591 | &batadv_tt_local_hash_lock_class_key); | |
592 | ||
5346c35e | 593 | return 0; |
c6c8fea2 SE |
594 | } |
595 | ||
068ee6e2 AQ |
596 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
597 | struct batadv_tt_global_entry *tt_global, | |
598 | const char *message) | |
599 | { | |
f131a568 SE |
600 | struct batadv_tt_global_entry *tt_removed_entry; |
601 | struct hlist_node *tt_removed_node; | |
602 | ||
068ee6e2 | 603 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
604 | "Deleting global tt entry %pM (vid: %d): %s\n", |
605 | tt_global->common.addr, | |
f7a2bd65 | 606 | batadv_print_vid(tt_global->common.vid), message); |
068ee6e2 | 607 | |
f131a568 SE |
608 | tt_removed_node = batadv_hash_remove(bat_priv->tt.global_hash, |
609 | batadv_compare_tt, | |
610 | batadv_choose_tt, | |
611 | &tt_global->common); | |
612 | if (!tt_removed_node) | |
613 | return; | |
614 | ||
615 | /* drop reference of remove hash entry */ | |
616 | tt_removed_entry = hlist_entry(tt_removed_node, | |
617 | struct batadv_tt_global_entry, | |
618 | common.hash_entry); | |
619 | batadv_tt_global_entry_put(tt_removed_entry); | |
068ee6e2 AQ |
620 | } |
621 | ||
c018ad3d | 622 | /** |
7e9a8c2c | 623 | * batadv_tt_local_add() - add a new client to the local table or update an |
c018ad3d AQ |
624 | * existing client |
625 | * @soft_iface: netdev struct of the mesh interface | |
626 | * @addr: the mac address of the client to add | |
627 | * @vid: VLAN identifier | |
628 | * @ifindex: index of the interface where the client is connected to (useful to | |
629 | * identify wireless clients) | |
9464d071 AQ |
630 | * @mark: the value contained in the skb->mark field of the received packet (if |
631 | * any) | |
a19d3d85 | 632 | * |
62fe710f | 633 | * Return: true if the client was successfully added, false otherwise. |
c018ad3d | 634 | */ |
6b5e971a SE |
635 | bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr, |
636 | unsigned short vid, int ifindex, u32 mark) | |
c6c8fea2 | 637 | { |
56303d34 | 638 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf | 639 | struct batadv_tt_local_entry *tt_local; |
c5caf4ef | 640 | struct batadv_tt_global_entry *tt_global = NULL; |
2cd45a06 | 641 | struct net *net = dev_net(soft_iface); |
35df3b29 | 642 | struct batadv_softif_vlan *vlan; |
0c69aecc | 643 | struct net_device *in_dev = NULL; |
10b1bbb4 | 644 | struct batadv_hard_iface *in_hardif = NULL; |
db08e6e5 | 645 | struct hlist_head *head; |
56303d34 | 646 | struct batadv_tt_orig_list_entry *orig_entry; |
a19d3d85 | 647 | int hash_added, table_size, packet_size_max; |
4f248cff SE |
648 | bool ret = false; |
649 | bool roamed_back = false; | |
6b5e971a SE |
650 | u8 remote_flags; |
651 | u32 match_mark; | |
c6c8fea2 | 652 | |
0c69aecc | 653 | if (ifindex != BATADV_NULL_IFINDEX) |
2cd45a06 | 654 | in_dev = dev_get_by_index(net, ifindex); |
0c69aecc | 655 | |
10b1bbb4 SE |
656 | if (in_dev) |
657 | in_hardif = batadv_hardif_get_by_netdev(in_dev); | |
658 | ||
c018ad3d | 659 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
c5caf4ef LL |
660 | |
661 | if (!is_multicast_ether_addr(addr)) | |
662 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 663 | |
47c94655 AQ |
664 | if (tt_local) { |
665 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
666 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
667 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 | 668 | "Re-adding pending client %pM (vid: %d)\n", |
f7a2bd65 | 669 | addr, batadv_print_vid(vid)); |
068ee6e2 AQ |
670 | /* whatever the reason why the PENDING flag was set, |
671 | * this is a client which was enqueued to be removed in | |
672 | * this orig_interval. Since it popped up again, the | |
673 | * flag can be reset like it was never enqueued | |
674 | */ | |
675 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
676 | goto add_event; | |
677 | } | |
678 | ||
679 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
680 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 | 681 | "Roaming client %pM (vid: %d) came back to its original location\n", |
f7a2bd65 | 682 | addr, batadv_print_vid(vid)); |
068ee6e2 AQ |
683 | /* the ROAM flag is set because this client roamed away |
684 | * and the node got a roaming_advertisement message. Now | |
685 | * that the client popped up again at its original | |
686 | * location such flag can be unset | |
687 | */ | |
688 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
689 | roamed_back = true; | |
690 | } | |
691 | goto check_roaming; | |
c6c8fea2 SE |
692 | } |
693 | ||
a19d3d85 ML |
694 | /* Ignore the client if we cannot send it in a full table response. */ |
695 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
696 | table_size += batadv_tt_len(1); | |
697 | packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
698 | if (table_size > packet_size_max) { | |
699 | net_ratelimited_function(batadv_info, soft_iface, | |
700 | "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n", | |
701 | table_size, packet_size_max, addr); | |
702 | goto out; | |
703 | } | |
704 | ||
86452f81 | 705 | tt_local = kmem_cache_alloc(batadv_tl_cache, GFP_ATOMIC); |
47c94655 | 706 | if (!tt_local) |
7683fdc1 | 707 | goto out; |
a73105b8 | 708 | |
35df3b29 AQ |
709 | /* increase the refcounter of the related vlan */ |
710 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
0b3dd7df SW |
711 | if (!vlan) { |
712 | net_ratelimited_function(batadv_info, soft_iface, | |
713 | "adding TT local entry %pM to non-existent VLAN %d\n", | |
f7a2bd65 | 714 | addr, batadv_print_vid(vid)); |
86452f81 | 715 | kmem_cache_free(batadv_tl_cache, tt_local); |
fd7dec25 | 716 | tt_local = NULL; |
354136bc | 717 | goto out; |
fd7dec25 | 718 | } |
35df3b29 | 719 | |
39c75a51 | 720 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 721 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
f7a2bd65 | 722 | addr, batadv_print_vid(vid), |
6b5e971a | 723 | (u8)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 724 | |
8fdd0153 | 725 | ether_addr_copy(tt_local->common.addr, addr); |
8425ec6a AQ |
726 | /* The local entry has to be marked as NEW to avoid to send it in |
727 | * a full table response going out before the next ttvn increment | |
728 | * (consistency check) | |
729 | */ | |
730 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 731 | tt_local->common.vid = vid; |
10b1bbb4 | 732 | if (batadv_is_wifi_hardif(in_hardif)) |
47c94655 | 733 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
92dcdf09 | 734 | kref_init(&tt_local->common.refcount); |
47c94655 AQ |
735 | tt_local->last_seen = jiffies; |
736 | tt_local->common.added_at = tt_local->last_seen; | |
a33d970d | 737 | tt_local->vlan = vlan; |
c6c8fea2 | 738 | |
c5caf4ef LL |
739 | /* the batman interface mac and multicast addresses should never be |
740 | * purged | |
741 | */ | |
742 | if (batadv_compare_eth(addr, soft_iface->dev_addr) || | |
743 | is_multicast_ether_addr(addr)) | |
47c94655 | 744 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 745 | |
e3387b26 | 746 | kref_get(&tt_local->common.refcount); |
807736f6 | 747 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 748 | batadv_choose_tt, &tt_local->common, |
47c94655 | 749 | &tt_local->common.hash_entry); |
80b3f58c SW |
750 | |
751 | if (unlikely(hash_added != 0)) { | |
752 | /* remove the reference for the hash */ | |
95c0db90 | 753 | batadv_tt_local_entry_put(tt_local); |
80b3f58c SW |
754 | goto out; |
755 | } | |
756 | ||
068ee6e2 | 757 | add_event: |
3abe4adb | 758 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 759 | |
068ee6e2 AQ |
760 | check_roaming: |
761 | /* Check whether it is a roaming, but don't do anything if the roaming | |
762 | * process has already been handled | |
763 | */ | |
764 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 765 | /* These node are probably going to update their tt table */ |
47c94655 | 766 | head = &tt_global->orig_list; |
db08e6e5 | 767 | rcu_read_lock(); |
b67bfe0d | 768 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 769 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 770 | tt_global->common.vid, |
a513088d | 771 | orig_entry->orig_node); |
db08e6e5 SW |
772 | } |
773 | rcu_read_unlock(); | |
068ee6e2 AQ |
774 | if (roamed_back) { |
775 | batadv_tt_global_free(bat_priv, tt_global, | |
776 | "Roaming canceled"); | |
777 | tt_global = NULL; | |
778 | } else { | |
779 | /* The global entry has to be marked as ROAMING and | |
780 | * has to be kept for consistency purpose | |
781 | */ | |
782 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
783 | tt_global->roam_at = jiffies; | |
784 | } | |
7683fdc1 | 785 | } |
068ee6e2 | 786 | |
3c4f7ab6 AQ |
787 | /* store the current remote flags before altering them. This helps |
788 | * understanding is flags are changing or not | |
789 | */ | |
790 | remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK; | |
791 | ||
10b1bbb4 | 792 | if (batadv_is_wifi_hardif(in_hardif)) |
3c4f7ab6 AQ |
793 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
794 | else | |
795 | tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI; | |
a19d3d85 | 796 | |
9464d071 AQ |
797 | /* check the mark in the skb: if it's equal to the configured |
798 | * isolation_mark, it means the packet is coming from an isolated | |
799 | * non-mesh client | |
800 | */ | |
801 | match_mark = (mark & bat_priv->isolation_mark_mask); | |
802 | if (bat_priv->isolation_mark_mask && | |
803 | match_mark == bat_priv->isolation_mark) | |
804 | tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA; | |
805 | else | |
806 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA; | |
807 | ||
3c4f7ab6 AQ |
808 | /* if any "dynamic" flag has been modified, resend an ADD event for this |
809 | * entry so that all the nodes can get the new flags | |
810 | */ | |
811 | if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK)) | |
812 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); | |
813 | ||
814 | ret = true; | |
7683fdc1 | 815 | out: |
79a0bffb | 816 | batadv_hardif_put(in_hardif); |
1160dfa1 | 817 | dev_put(in_dev); |
79a0bffb SE |
818 | batadv_tt_local_entry_put(tt_local); |
819 | batadv_tt_global_entry_put(tt_global); | |
a19d3d85 | 820 | return ret; |
c6c8fea2 SE |
821 | } |
822 | ||
7ea7b4a1 | 823 | /** |
7e9a8c2c | 824 | * batadv_tt_prepare_tvlv_global_data() - prepare the TVLV TT header to send |
7ea7b4a1 AQ |
825 | * within a TT Response directed to another node |
826 | * @orig_node: originator for which the TT data has to be prepared | |
827 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
828 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
829 | * changed can be stored | |
830 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
831 | * function reserves the amount of space needed to send the entire global TT | |
832 | * table. In case of success the value is updated with the real amount of | |
833 | * reserved bytes | |
7ea7b4a1 | 834 | * Allocate the needed amount of memory for the entire TT TVLV and write its |
bccb48c8 | 835 | * header made up of one tvlv_tt_data object and a series of tvlv_tt_vlan_data |
7ea7b4a1 AQ |
836 | * objects, one per active VLAN served by the originator node. |
837 | * | |
62fe710f | 838 | * Return: the size of the allocated buffer or 0 in case of failure. |
7ea7b4a1 | 839 | */ |
6b5e971a | 840 | static u16 |
7ea7b4a1 AQ |
841 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, |
842 | struct batadv_tvlv_tt_data **tt_data, | |
843 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 844 | s32 *tt_len) |
7ea7b4a1 | 845 | { |
4f248cff SE |
846 | u16 num_vlan = 0; |
847 | u16 num_entries = 0; | |
848 | u16 change_offset; | |
849 | u16 tvlv_len; | |
7ea7b4a1 AQ |
850 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
851 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 852 | u8 *tt_change_ptr; |
7ea7b4a1 | 853 | |
8ba0f9bd | 854 | spin_lock_bh(&orig_node->vlan_list_lock); |
3b2582c7 | 855 | hlist_for_each_entry(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
856 | num_vlan++; |
857 | num_entries += atomic_read(&vlan->tt.num_entries); | |
858 | } | |
859 | ||
860 | change_offset = sizeof(**tt_data); | |
861 | change_offset += num_vlan * sizeof(*tt_vlan); | |
862 | ||
863 | /* if tt_len is negative, allocate the space needed by the full table */ | |
864 | if (*tt_len < 0) | |
865 | *tt_len = batadv_tt_len(num_entries); | |
866 | ||
867 | tvlv_len = *tt_len; | |
868 | tvlv_len += change_offset; | |
869 | ||
870 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
871 | if (!*tt_data) { | |
872 | *tt_len = 0; | |
873 | goto out; | |
874 | } | |
875 | ||
876 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
877 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
878 | (*tt_data)->num_vlan = htons(num_vlan); | |
879 | ||
880 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
3b2582c7 | 881 | hlist_for_each_entry(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
882 | tt_vlan->vid = htons(vlan->vid); |
883 | tt_vlan->crc = htonl(vlan->tt.crc); | |
08c27f33 | 884 | tt_vlan->reserved = 0; |
7ea7b4a1 AQ |
885 | |
886 | tt_vlan++; | |
887 | } | |
888 | ||
6b5e971a | 889 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
890 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
891 | ||
892 | out: | |
8ba0f9bd | 893 | spin_unlock_bh(&orig_node->vlan_list_lock); |
7ea7b4a1 AQ |
894 | return tvlv_len; |
895 | } | |
896 | ||
897 | /** | |
7e9a8c2c SE |
898 | * batadv_tt_prepare_tvlv_local_data() - allocate and prepare the TT TVLV for |
899 | * this node | |
7ea7b4a1 AQ |
900 | * @bat_priv: the bat priv with all the soft interface information |
901 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
902 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
903 | * changes can be stored | |
904 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
905 | * function reserves the amount of space needed to send the entire local TT | |
906 | * table. In case of success the value is updated with the real amount of | |
907 | * reserved bytes | |
908 | * | |
909 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
910 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
911 | * objects, one per active VLAN. | |
912 | * | |
62fe710f | 913 | * Return: the size of the allocated buffer or 0 in case of failure. |
7ea7b4a1 | 914 | */ |
6b5e971a | 915 | static u16 |
7ea7b4a1 AQ |
916 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, |
917 | struct batadv_tvlv_tt_data **tt_data, | |
918 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 919 | s32 *tt_len) |
7ea7b4a1 AQ |
920 | { |
921 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
922 | struct batadv_softif_vlan *vlan; | |
4f248cff | 923 | u16 num_vlan = 0; |
16116dac ML |
924 | u16 vlan_entries = 0; |
925 | u16 total_entries = 0; | |
4f248cff | 926 | u16 tvlv_len; |
6b5e971a | 927 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
928 | int change_offset; |
929 | ||
8ba0f9bd | 930 | spin_lock_bh(&bat_priv->softif_vlan_list_lock); |
3b2582c7 | 931 | hlist_for_each_entry(vlan, &bat_priv->softif_vlan_list, list) { |
16116dac ML |
932 | vlan_entries = atomic_read(&vlan->tt.num_entries); |
933 | if (vlan_entries < 1) | |
934 | continue; | |
935 | ||
7ea7b4a1 | 936 | num_vlan++; |
16116dac | 937 | total_entries += vlan_entries; |
7ea7b4a1 AQ |
938 | } |
939 | ||
940 | change_offset = sizeof(**tt_data); | |
941 | change_offset += num_vlan * sizeof(*tt_vlan); | |
942 | ||
943 | /* if tt_len is negative, allocate the space needed by the full table */ | |
944 | if (*tt_len < 0) | |
16116dac | 945 | *tt_len = batadv_tt_len(total_entries); |
7ea7b4a1 AQ |
946 | |
947 | tvlv_len = *tt_len; | |
948 | tvlv_len += change_offset; | |
949 | ||
950 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
951 | if (!*tt_data) { | |
952 | tvlv_len = 0; | |
953 | goto out; | |
954 | } | |
955 | ||
956 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
957 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
958 | (*tt_data)->num_vlan = htons(num_vlan); | |
959 | ||
960 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
3b2582c7 | 961 | hlist_for_each_entry(vlan, &bat_priv->softif_vlan_list, list) { |
16116dac ML |
962 | vlan_entries = atomic_read(&vlan->tt.num_entries); |
963 | if (vlan_entries < 1) | |
964 | continue; | |
965 | ||
7ea7b4a1 AQ |
966 | tt_vlan->vid = htons(vlan->vid); |
967 | tt_vlan->crc = htonl(vlan->tt.crc); | |
08c27f33 | 968 | tt_vlan->reserved = 0; |
7ea7b4a1 AQ |
969 | |
970 | tt_vlan++; | |
971 | } | |
972 | ||
6b5e971a | 973 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
974 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
975 | ||
976 | out: | |
8ba0f9bd | 977 | spin_unlock_bh(&bat_priv->softif_vlan_list_lock); |
7ea7b4a1 AQ |
978 | return tvlv_len; |
979 | } | |
980 | ||
e1bf0c14 | 981 | /** |
7e9a8c2c SE |
982 | * batadv_tt_tvlv_container_update() - update the translation table tvlv |
983 | * container after local tt changes have been committed | |
e1bf0c14 ML |
984 | * @bat_priv: the bat priv with all the soft interface information |
985 | */ | |
986 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 987 | { |
e1bf0c14 ML |
988 | struct batadv_tt_change_node *entry, *safe; |
989 | struct batadv_tvlv_tt_data *tt_data; | |
990 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 991 | int tt_diff_len, tt_change_len = 0; |
4f248cff SE |
992 | int tt_diff_entries_num = 0; |
993 | int tt_diff_entries_count = 0; | |
6b5e971a | 994 | u16 tvlv_len; |
be9aa4c1 | 995 | |
7ea7b4a1 AQ |
996 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
997 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
998 | |
999 | /* if we have too many changes for one packet don't send any | |
1000 | * and wait for the tt table request which will be fragmented | |
1001 | */ | |
e1bf0c14 ML |
1002 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
1003 | tt_diff_len = 0; | |
be9aa4c1 | 1004 | |
7ea7b4a1 AQ |
1005 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
1006 | &tt_change, &tt_diff_len); | |
1007 | if (!tvlv_len) | |
e1bf0c14 | 1008 | return; |
be9aa4c1 | 1009 | |
e1bf0c14 | 1010 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 1011 | |
e1bf0c14 ML |
1012 | if (tt_diff_len == 0) |
1013 | goto container_register; | |
be9aa4c1 | 1014 | |
807736f6 SE |
1015 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
1016 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 1017 | |
807736f6 | 1018 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 1019 | list) { |
e1bf0c14 ML |
1020 | if (tt_diff_entries_count < tt_diff_entries_num) { |
1021 | memcpy(tt_change + tt_diff_entries_count, | |
1022 | &entry->change, | |
1023 | sizeof(struct batadv_tvlv_tt_change)); | |
1024 | tt_diff_entries_count++; | |
c6c8fea2 | 1025 | } |
a73105b8 | 1026 | list_del(&entry->list); |
86452f81 | 1027 | kmem_cache_free(batadv_tt_change_cache, entry); |
c6c8fea2 | 1028 | } |
807736f6 | 1029 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
1030 | |
1031 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
1032 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
1033 | kfree(bat_priv->tt.last_changeset); | |
1034 | bat_priv->tt.last_changeset_len = 0; | |
1035 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 1036 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 1037 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 1038 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 1039 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
1040 | * instead of providing the diff |
1041 | */ | |
e1bf0c14 | 1042 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 1043 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
1044 | memcpy(bat_priv->tt.last_changeset, |
1045 | tt_change, tt_change_len); | |
1046 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
1047 | } |
1048 | } | |
807736f6 | 1049 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 1050 | |
e1bf0c14 ML |
1051 | container_register: |
1052 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 1053 | tvlv_len); |
e1bf0c14 | 1054 | kfree(tt_data); |
c6c8fea2 SE |
1055 | } |
1056 | ||
d34f0550 | 1057 | /** |
7e9a8c2c | 1058 | * batadv_tt_local_dump_entry() - Dump one TT local entry into a message |
d34f0550 MS |
1059 | * @msg :Netlink message to dump into |
1060 | * @portid: Port making netlink request | |
6b7b40aa | 1061 | * @cb: Control block containing additional options |
d34f0550 MS |
1062 | * @bat_priv: The bat priv with all the soft interface information |
1063 | * @common: tt local & tt global common data | |
1064 | * | |
1065 | * Return: Error code, or 0 on success | |
1066 | */ | |
1067 | static int | |
6b7b40aa SE |
1068 | batadv_tt_local_dump_entry(struct sk_buff *msg, u32 portid, |
1069 | struct netlink_callback *cb, | |
d34f0550 MS |
1070 | struct batadv_priv *bat_priv, |
1071 | struct batadv_tt_common_entry *common) | |
1072 | { | |
1073 | void *hdr; | |
1074 | struct batadv_softif_vlan *vlan; | |
1075 | struct batadv_tt_local_entry *local; | |
1076 | unsigned int last_seen_msecs; | |
1077 | u32 crc; | |
1078 | ||
1079 | local = container_of(common, struct batadv_tt_local_entry, common); | |
1080 | last_seen_msecs = jiffies_to_msecs(jiffies - local->last_seen); | |
1081 | ||
1082 | vlan = batadv_softif_vlan_get(bat_priv, common->vid); | |
1083 | if (!vlan) | |
1084 | return 0; | |
1085 | ||
1086 | crc = vlan->tt.crc; | |
1087 | ||
1088 | batadv_softif_vlan_put(vlan); | |
1089 | ||
6b7b40aa SE |
1090 | hdr = genlmsg_put(msg, portid, cb->nlh->nlmsg_seq, |
1091 | &batadv_netlink_family, NLM_F_MULTI, | |
d34f0550 MS |
1092 | BATADV_CMD_GET_TRANSTABLE_LOCAL); |
1093 | if (!hdr) | |
1094 | return -ENOBUFS; | |
1095 | ||
6b7b40aa SE |
1096 | genl_dump_check_consistent(cb, hdr); |
1097 | ||
d34f0550 MS |
1098 | if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) || |
1099 | nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) || | |
1100 | nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) || | |
1101 | nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, common->flags)) | |
1102 | goto nla_put_failure; | |
1103 | ||
1104 | if (!(common->flags & BATADV_TT_CLIENT_NOPURGE) && | |
1105 | nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, last_seen_msecs)) | |
1106 | goto nla_put_failure; | |
1107 | ||
1108 | genlmsg_end(msg, hdr); | |
1109 | return 0; | |
1110 | ||
1111 | nla_put_failure: | |
1112 | genlmsg_cancel(msg, hdr); | |
1113 | return -EMSGSIZE; | |
1114 | } | |
1115 | ||
1116 | /** | |
7e9a8c2c | 1117 | * batadv_tt_local_dump_bucket() - Dump one TT local bucket into a message |
d34f0550 MS |
1118 | * @msg: Netlink message to dump into |
1119 | * @portid: Port making netlink request | |
6b7b40aa | 1120 | * @cb: Control block containing additional options |
d34f0550 | 1121 | * @bat_priv: The bat priv with all the soft interface information |
6b7b40aa SE |
1122 | * @hash: hash to dump |
1123 | * @bucket: bucket index to dump | |
d34f0550 MS |
1124 | * @idx_s: Number of entries to skip |
1125 | * | |
1126 | * Return: Error code, or 0 on success | |
1127 | */ | |
1128 | static int | |
6b7b40aa SE |
1129 | batadv_tt_local_dump_bucket(struct sk_buff *msg, u32 portid, |
1130 | struct netlink_callback *cb, | |
d34f0550 | 1131 | struct batadv_priv *bat_priv, |
6b7b40aa SE |
1132 | struct batadv_hashtable *hash, unsigned int bucket, |
1133 | int *idx_s) | |
d34f0550 MS |
1134 | { |
1135 | struct batadv_tt_common_entry *common; | |
1136 | int idx = 0; | |
1137 | ||
6b7b40aa SE |
1138 | spin_lock_bh(&hash->list_locks[bucket]); |
1139 | cb->seq = atomic_read(&hash->generation) << 1 | 1; | |
1140 | ||
1141 | hlist_for_each_entry(common, &hash->table[bucket], hash_entry) { | |
d34f0550 MS |
1142 | if (idx++ < *idx_s) |
1143 | continue; | |
1144 | ||
6b7b40aa | 1145 | if (batadv_tt_local_dump_entry(msg, portid, cb, bat_priv, |
d34f0550 | 1146 | common)) { |
6b7b40aa | 1147 | spin_unlock_bh(&hash->list_locks[bucket]); |
d34f0550 MS |
1148 | *idx_s = idx - 1; |
1149 | return -EMSGSIZE; | |
1150 | } | |
1151 | } | |
6b7b40aa | 1152 | spin_unlock_bh(&hash->list_locks[bucket]); |
d34f0550 MS |
1153 | |
1154 | *idx_s = 0; | |
1155 | return 0; | |
1156 | } | |
1157 | ||
1158 | /** | |
7e9a8c2c | 1159 | * batadv_tt_local_dump() - Dump TT local entries into a message |
d34f0550 MS |
1160 | * @msg: Netlink message to dump into |
1161 | * @cb: Parameters from query | |
1162 | * | |
1163 | * Return: Error code, or 0 on success | |
1164 | */ | |
1165 | int batadv_tt_local_dump(struct sk_buff *msg, struct netlink_callback *cb) | |
1166 | { | |
1167 | struct net *net = sock_net(cb->skb->sk); | |
1168 | struct net_device *soft_iface; | |
1169 | struct batadv_priv *bat_priv; | |
1170 | struct batadv_hard_iface *primary_if = NULL; | |
1171 | struct batadv_hashtable *hash; | |
d34f0550 MS |
1172 | int ret; |
1173 | int ifindex; | |
1174 | int bucket = cb->args[0]; | |
1175 | int idx = cb->args[1]; | |
1176 | int portid = NETLINK_CB(cb->skb).portid; | |
1177 | ||
1178 | ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX); | |
1179 | if (!ifindex) | |
1180 | return -EINVAL; | |
1181 | ||
1182 | soft_iface = dev_get_by_index(net, ifindex); | |
1183 | if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { | |
1184 | ret = -ENODEV; | |
1185 | goto out; | |
1186 | } | |
1187 | ||
1188 | bat_priv = netdev_priv(soft_iface); | |
1189 | ||
1190 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
1191 | if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { | |
1192 | ret = -ENOENT; | |
1193 | goto out; | |
1194 | } | |
1195 | ||
1196 | hash = bat_priv->tt.local_hash; | |
1197 | ||
1198 | while (bucket < hash->size) { | |
6b7b40aa SE |
1199 | if (batadv_tt_local_dump_bucket(msg, portid, cb, bat_priv, |
1200 | hash, bucket, &idx)) | |
d34f0550 MS |
1201 | break; |
1202 | ||
1203 | bucket++; | |
1204 | } | |
1205 | ||
1206 | ret = msg->len; | |
1207 | ||
1208 | out: | |
79a0bffb | 1209 | batadv_hardif_put(primary_if); |
1160dfa1 | 1210 | dev_put(soft_iface); |
d34f0550 MS |
1211 | |
1212 | cb->args[0] = bucket; | |
1213 | cb->args[1] = idx; | |
1214 | ||
1215 | return ret; | |
1216 | } | |
1217 | ||
56303d34 SE |
1218 | static void |
1219 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
1220 | struct batadv_tt_local_entry *tt_local_entry, | |
6b5e971a | 1221 | u16 flags, const char *message) |
c6c8fea2 | 1222 | { |
3abe4adb | 1223 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 1224 | |
015758d0 AQ |
1225 | /* The local client has to be marked as "pending to be removed" but has |
1226 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
1227 | * response issued before the net ttvn increment (consistency check) |
1228 | */ | |
acd34afa | 1229 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 1230 | |
39c75a51 | 1231 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1232 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
1233 | tt_local_entry->common.addr, | |
f7a2bd65 | 1234 | batadv_print_vid(tt_local_entry->common.vid), message); |
c6c8fea2 SE |
1235 | } |
1236 | ||
7f91d06c | 1237 | /** |
7e9a8c2c | 1238 | * batadv_tt_local_remove() - logically remove an entry from the local table |
7f91d06c AQ |
1239 | * @bat_priv: the bat priv with all the soft interface information |
1240 | * @addr: the MAC address of the client to remove | |
c018ad3d | 1241 | * @vid: VLAN identifier |
7f91d06c AQ |
1242 | * @message: message to append to the log on deletion |
1243 | * @roaming: true if the deletion is due to a roaming event | |
1244 | * | |
62fe710f | 1245 | * Return: the flags assigned to the local entry before being deleted |
7f91d06c | 1246 | */ |
6b5e971a SE |
1247 | u16 batadv_tt_local_remove(struct batadv_priv *bat_priv, const u8 *addr, |
1248 | unsigned short vid, const char *message, | |
1249 | bool roaming) | |
c6c8fea2 | 1250 | { |
3d65b9ac | 1251 | struct batadv_tt_local_entry *tt_removed_entry; |
170173bf | 1252 | struct batadv_tt_local_entry *tt_local_entry; |
6b5e971a | 1253 | u16 flags, curr_flags = BATADV_NO_FLAGS; |
3d65b9ac | 1254 | struct hlist_node *tt_removed_node; |
c6c8fea2 | 1255 | |
c018ad3d | 1256 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
1257 | if (!tt_local_entry) |
1258 | goto out; | |
1259 | ||
7f91d06c AQ |
1260 | curr_flags = tt_local_entry->common.flags; |
1261 | ||
acd34afa | 1262 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
1263 | /* if this global entry addition is due to a roaming, the node has to |
1264 | * mark the local entry as "roamed" in order to correctly reroute | |
1265 | * packets later | |
1266 | */ | |
7c1fd91d | 1267 | if (roaming) { |
acd34afa | 1268 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
1269 | /* mark the local client as ROAMed */ |
1270 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
1271 | } | |
42d0b044 | 1272 | |
068ee6e2 AQ |
1273 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
1274 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
1275 | message); | |
1276 | goto out; | |
1277 | } | |
1278 | /* if this client has been added right now, it is possible to | |
1279 | * immediately purge it | |
1280 | */ | |
3abe4adb | 1281 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
ef72706a | 1282 | |
3d65b9ac | 1283 | tt_removed_node = batadv_hash_remove(bat_priv->tt.local_hash, |
ef72706a ML |
1284 | batadv_compare_tt, |
1285 | batadv_choose_tt, | |
1286 | &tt_local_entry->common); | |
3d65b9ac | 1287 | if (!tt_removed_node) |
ef72706a ML |
1288 | goto out; |
1289 | ||
3d65b9ac SE |
1290 | /* drop reference of remove hash entry */ |
1291 | tt_removed_entry = hlist_entry(tt_removed_node, | |
1292 | struct batadv_tt_local_entry, | |
1293 | common.hash_entry); | |
1294 | batadv_tt_local_entry_put(tt_removed_entry); | |
7f91d06c | 1295 | |
7683fdc1 | 1296 | out: |
79a0bffb | 1297 | batadv_tt_local_entry_put(tt_local_entry); |
7f91d06c AQ |
1298 | |
1299 | return curr_flags; | |
c6c8fea2 SE |
1300 | } |
1301 | ||
a19d3d85 | 1302 | /** |
7e9a8c2c | 1303 | * batadv_tt_local_purge_list() - purge inactive tt local entries |
a19d3d85 ML |
1304 | * @bat_priv: the bat priv with all the soft interface information |
1305 | * @head: pointer to the list containing the local tt entries | |
1306 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1307 | * inactive or not | |
1308 | */ | |
56303d34 | 1309 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
1310 | struct hlist_head *head, |
1311 | int timeout) | |
c6c8fea2 | 1312 | { |
56303d34 SE |
1313 | struct batadv_tt_local_entry *tt_local_entry; |
1314 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 1315 | struct hlist_node *node_tmp; |
acd34afa | 1316 | |
b67bfe0d | 1317 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
1318 | hash_entry) { |
1319 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
1320 | struct batadv_tt_local_entry, |
1321 | common); | |
acd34afa SE |
1322 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1323 | continue; | |
1324 | ||
1325 | /* entry already marked for deletion */ | |
1326 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1327 | continue; | |
1328 | ||
a19d3d85 | 1329 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1330 | continue; |
1331 | ||
1332 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1333 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1334 | } | |
1335 | } | |
1336 | ||
a19d3d85 | 1337 | /** |
7e9a8c2c | 1338 | * batadv_tt_local_purge() - purge inactive tt local entries |
a19d3d85 ML |
1339 | * @bat_priv: the bat priv with all the soft interface information |
1340 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1341 | * inactive or not | |
1342 | */ | |
1343 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1344 | int timeout) | |
acd34afa | 1345 | { |
807736f6 | 1346 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1347 | struct hlist_head *head; |
7683fdc1 | 1348 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 1349 | u32 i; |
c6c8fea2 | 1350 | |
c6c8fea2 SE |
1351 | for (i = 0; i < hash->size; i++) { |
1352 | head = &hash->table[i]; | |
7683fdc1 | 1353 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1354 | |
7683fdc1 | 1355 | spin_lock_bh(list_lock); |
a19d3d85 | 1356 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1357 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1358 | } |
c6c8fea2 SE |
1359 | } |
1360 | ||
56303d34 | 1361 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1362 | { |
5bf74e9c | 1363 | struct batadv_hashtable *hash; |
a73105b8 | 1364 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1365 | struct batadv_tt_common_entry *tt_common_entry; |
1366 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 1367 | struct hlist_node *node_tmp; |
7683fdc1 | 1368 | struct hlist_head *head; |
6b5e971a | 1369 | u32 i; |
a73105b8 | 1370 | |
807736f6 | 1371 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1372 | return; |
1373 | ||
807736f6 | 1374 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1375 | |
1376 | for (i = 0; i < hash->size; i++) { | |
1377 | head = &hash->table[i]; | |
1378 | list_lock = &hash->list_locks[i]; | |
1379 | ||
1380 | spin_lock_bh(list_lock); | |
b67bfe0d | 1381 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1382 | head, hash_entry) { |
b67bfe0d | 1383 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1384 | tt_local = container_of(tt_common_entry, |
1385 | struct batadv_tt_local_entry, | |
1386 | common); | |
35df3b29 | 1387 | |
95c0db90 | 1388 | batadv_tt_local_entry_put(tt_local); |
a73105b8 AQ |
1389 | } |
1390 | spin_unlock_bh(list_lock); | |
1391 | } | |
1392 | ||
1a8eaf07 | 1393 | batadv_hash_destroy(hash); |
a73105b8 | 1394 | |
807736f6 | 1395 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1396 | } |
1397 | ||
56303d34 | 1398 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1399 | { |
807736f6 | 1400 | if (bat_priv->tt.global_hash) |
5346c35e | 1401 | return 0; |
c6c8fea2 | 1402 | |
807736f6 | 1403 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1404 | |
807736f6 | 1405 | if (!bat_priv->tt.global_hash) |
5346c35e | 1406 | return -ENOMEM; |
c6c8fea2 | 1407 | |
dec05074 AQ |
1408 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1409 | &batadv_tt_global_hash_lock_class_key); | |
1410 | ||
5346c35e | 1411 | return 0; |
c6c8fea2 SE |
1412 | } |
1413 | ||
56303d34 | 1414 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1415 | { |
56303d34 | 1416 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1417 | |
807736f6 | 1418 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1419 | |
807736f6 | 1420 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1421 | list) { |
1422 | list_del(&entry->list); | |
86452f81 | 1423 | kmem_cache_free(batadv_tt_change_cache, entry); |
a73105b8 | 1424 | } |
c6c8fea2 | 1425 | |
807736f6 SE |
1426 | atomic_set(&bat_priv->tt.local_changes, 0); |
1427 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1428 | } |
c6c8fea2 | 1429 | |
62fe710f | 1430 | /** |
7e9a8c2c | 1431 | * batadv_tt_global_orig_entry_find() - find a TT orig_list_entry |
d15cd622 AQ |
1432 | * @entry: the TT global entry where the orig_list_entry has to be |
1433 | * extracted from | |
1434 | * @orig_node: the originator for which the orig_list_entry has to be found | |
62fe710f | 1435 | * |
d15cd622 | 1436 | * retrieve the orig_tt_list_entry belonging to orig_node from the |
d657e621 AQ |
1437 | * batadv_tt_global_entry list |
1438 | * | |
62fe710f | 1439 | * Return: it with an increased refcounter, NULL if not found |
db08e6e5 | 1440 | */ |
d657e621 AQ |
1441 | static struct batadv_tt_orig_list_entry * |
1442 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1443 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1444 | { |
d657e621 | 1445 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1446 | const struct hlist_head *head; |
db08e6e5 SW |
1447 | |
1448 | rcu_read_lock(); | |
1449 | head = &entry->orig_list; | |
b67bfe0d | 1450 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1451 | if (tmp_orig_entry->orig_node != orig_node) |
1452 | continue; | |
6e8ef69d | 1453 | if (!kref_get_unless_zero(&tmp_orig_entry->refcount)) |
d657e621 AQ |
1454 | continue; |
1455 | ||
1456 | orig_entry = tmp_orig_entry; | |
1457 | break; | |
db08e6e5 SW |
1458 | } |
1459 | rcu_read_unlock(); | |
d657e621 AQ |
1460 | |
1461 | return orig_entry; | |
1462 | } | |
1463 | ||
62fe710f | 1464 | /** |
7e9a8c2c SE |
1465 | * batadv_tt_global_entry_has_orig() - check if a TT global entry is also |
1466 | * handled by a given originator | |
d15cd622 AQ |
1467 | * @entry: the TT global entry to check |
1468 | * @orig_node: the originator to search in the list | |
7072337e LL |
1469 | * @flags: a pointer to store TT flags for the given @entry received |
1470 | * from @orig_node | |
62fe710f SE |
1471 | * |
1472 | * find out if an orig_node is already in the list of a tt_global_entry. | |
1473 | * | |
1474 | * Return: true if found, false otherwise | |
d657e621 AQ |
1475 | */ |
1476 | static bool | |
1477 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
7072337e LL |
1478 | const struct batadv_orig_node *orig_node, |
1479 | u8 *flags) | |
d657e621 AQ |
1480 | { |
1481 | struct batadv_tt_orig_list_entry *orig_entry; | |
1482 | bool found = false; | |
1483 | ||
1484 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1485 | if (orig_entry) { | |
1486 | found = true; | |
7072337e LL |
1487 | |
1488 | if (flags) | |
1489 | *flags = orig_entry->flags; | |
1490 | ||
7e2366c6 | 1491 | batadv_tt_orig_list_entry_put(orig_entry); |
d657e621 AQ |
1492 | } |
1493 | ||
db08e6e5 SW |
1494 | return found; |
1495 | } | |
1496 | ||
54e22f26 | 1497 | /** |
7e9a8c2c | 1498 | * batadv_tt_global_sync_flags() - update TT sync flags |
54e22f26 LL |
1499 | * @tt_global: the TT global entry to update sync flags in |
1500 | * | |
1501 | * Updates the sync flag bits in the tt_global flag attribute with a logical | |
1502 | * OR of all sync flags from any of its TT orig entries. | |
1503 | */ | |
1504 | static void | |
1505 | batadv_tt_global_sync_flags(struct batadv_tt_global_entry *tt_global) | |
1506 | { | |
1507 | struct batadv_tt_orig_list_entry *orig_entry; | |
1508 | const struct hlist_head *head; | |
1509 | u16 flags = BATADV_NO_FLAGS; | |
1510 | ||
1511 | rcu_read_lock(); | |
1512 | head = &tt_global->orig_list; | |
1513 | hlist_for_each_entry_rcu(orig_entry, head, list) | |
1514 | flags |= orig_entry->flags; | |
1515 | rcu_read_unlock(); | |
1516 | ||
1517 | flags |= tt_global->common.flags & (~BATADV_TT_SYNC_MASK); | |
1518 | tt_global->common.flags = flags; | |
1519 | } | |
1520 | ||
1521 | /** | |
7e9a8c2c | 1522 | * batadv_tt_global_orig_entry_add() - add or update a TT orig entry |
54e22f26 LL |
1523 | * @tt_global: the TT global entry to add an orig entry in |
1524 | * @orig_node: the originator to add an orig entry for | |
1525 | * @ttvn: translation table version number of this changeset | |
1526 | * @flags: TT sync flags | |
1527 | */ | |
a513088d | 1528 | static void |
d657e621 | 1529 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
54e22f26 LL |
1530 | struct batadv_orig_node *orig_node, int ttvn, |
1531 | u8 flags) | |
db08e6e5 | 1532 | { |
56303d34 | 1533 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1534 | |
e7136e48 SE |
1535 | spin_lock_bh(&tt_global->list_lock); |
1536 | ||
d657e621 | 1537 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1538 | if (orig_entry) { |
1539 | /* refresh the ttvn: the current value could be a bogus one that | |
1540 | * was added during a "temporary client detection" | |
1541 | */ | |
1542 | orig_entry->ttvn = ttvn; | |
54e22f26 LL |
1543 | orig_entry->flags = flags; |
1544 | goto sync_flags; | |
30cfd02b | 1545 | } |
d657e621 | 1546 | |
86452f81 | 1547 | orig_entry = kmem_cache_zalloc(batadv_tt_orig_cache, GFP_ATOMIC); |
db08e6e5 | 1548 | if (!orig_entry) |
d657e621 | 1549 | goto out; |
db08e6e5 SW |
1550 | |
1551 | INIT_HLIST_NODE(&orig_entry->list); | |
7c124391 | 1552 | kref_get(&orig_node->refcount); |
7ea7b4a1 | 1553 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1554 | orig_entry->orig_node = orig_node; |
1555 | orig_entry->ttvn = ttvn; | |
54e22f26 | 1556 | orig_entry->flags = flags; |
6e8ef69d | 1557 | kref_init(&orig_entry->refcount); |
db08e6e5 | 1558 | |
23f55485 | 1559 | kref_get(&orig_entry->refcount); |
db08e6e5 | 1560 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 | 1561 | &tt_global->orig_list); |
1d8ab8d3 LL |
1562 | atomic_inc(&tt_global->orig_list_count); |
1563 | ||
54e22f26 LL |
1564 | sync_flags: |
1565 | batadv_tt_global_sync_flags(tt_global); | |
d657e621 | 1566 | out: |
79a0bffb | 1567 | batadv_tt_orig_list_entry_put(orig_entry); |
e7136e48 SE |
1568 | |
1569 | spin_unlock_bh(&tt_global->list_lock); | |
db08e6e5 SW |
1570 | } |
1571 | ||
d4ff40f6 | 1572 | /** |
7e9a8c2c | 1573 | * batadv_tt_global_add() - add a new TT global entry or update an existing one |
d4ff40f6 AQ |
1574 | * @bat_priv: the bat priv with all the soft interface information |
1575 | * @orig_node: the originator announcing the client | |
1576 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1577 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1578 | * @flags: TT flags that have to be set for this non-mesh client |
1579 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1580 | * | |
1581 | * Add a new TT global entry for the given originator. If the entry already | |
1582 | * exists add a new reference to the given originator (a global entry can have | |
1583 | * references to multiple originators) and adjust the flags attribute to reflect | |
1584 | * the function argument. | |
1585 | * If a TT local entry exists for this non-mesh client remove it. | |
1586 | * | |
bccb48c8 | 1587 | * The caller must hold the orig_node refcount. |
1e5d49fc | 1588 | * |
62fe710f | 1589 | * Return: true if the new entry has been added, false otherwise |
d4ff40f6 | 1590 | */ |
1e5d49fc AQ |
1591 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1592 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1593 | const unsigned char *tt_addr, |
6b5e971a | 1594 | unsigned short vid, u16 flags, u8 ttvn) |
a73105b8 | 1595 | { |
170173bf SE |
1596 | struct batadv_tt_global_entry *tt_global_entry; |
1597 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1598 | bool ret = false; |
80b3f58c | 1599 | int hash_added; |
56303d34 | 1600 | struct batadv_tt_common_entry *common; |
6b5e971a | 1601 | u16 local_flags; |
c6c8fea2 | 1602 | |
cfd4f757 AQ |
1603 | /* ignore global entries from backbone nodes */ |
1604 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1605 | return true; | |
1606 | ||
c018ad3d AQ |
1607 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1608 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1609 | |
1610 | /* if the node already has a local client for this entry, it has to wait | |
1611 | * for a roaming advertisement instead of manually messing up the global | |
1612 | * table | |
1613 | */ | |
1614 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1615 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1616 | goto out; | |
a73105b8 AQ |
1617 | |
1618 | if (!tt_global_entry) { | |
86452f81 SE |
1619 | tt_global_entry = kmem_cache_zalloc(batadv_tg_cache, |
1620 | GFP_ATOMIC); | |
a73105b8 | 1621 | if (!tt_global_entry) |
7683fdc1 AQ |
1622 | goto out; |
1623 | ||
c0a55929 | 1624 | common = &tt_global_entry->common; |
8fdd0153 | 1625 | ether_addr_copy(common->addr, tt_addr); |
c018ad3d | 1626 | common->vid = vid; |
db08e6e5 | 1627 | |
a44ebeff LL |
1628 | if (!is_multicast_ether_addr(common->addr)) |
1629 | common->flags = flags & (~BATADV_TT_SYNC_MASK); | |
4a519b83 | 1630 | |
cc47f66e | 1631 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1632 | /* node must store current time in case of roaming. This is |
1633 | * needed to purge this entry out on timeout (if nobody claims | |
1634 | * it) | |
1635 | */ | |
1636 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1637 | tt_global_entry->roam_at = jiffies; | |
92dcdf09 | 1638 | kref_init(&common->refcount); |
30cfd02b | 1639 | common->added_at = jiffies; |
db08e6e5 SW |
1640 | |
1641 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1d8ab8d3 | 1642 | atomic_set(&tt_global_entry->orig_list_count, 0); |
db08e6e5 | 1643 | spin_lock_init(&tt_global_entry->list_lock); |
7683fdc1 | 1644 | |
15d5ffde | 1645 | kref_get(&common->refcount); |
807736f6 | 1646 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1647 | batadv_compare_tt, |
c018ad3d | 1648 | batadv_choose_tt, common, |
a513088d | 1649 | &common->hash_entry); |
80b3f58c SW |
1650 | |
1651 | if (unlikely(hash_added != 0)) { | |
1652 | /* remove the reference for the hash */ | |
5dafd8a6 | 1653 | batadv_tt_global_entry_put(tt_global_entry); |
80b3f58c SW |
1654 | goto out_remove; |
1655 | } | |
a73105b8 | 1656 | } else { |
068ee6e2 | 1657 | common = &tt_global_entry->common; |
30cfd02b AQ |
1658 | /* If there is already a global entry, we can use this one for |
1659 | * our processing. | |
068ee6e2 AQ |
1660 | * But if we are trying to add a temporary client then here are |
1661 | * two options at this point: | |
1662 | * 1) the global client is not a temporary client: the global | |
1663 | * client has to be left as it is, temporary information | |
1664 | * should never override any already known client state | |
1665 | * 2) the global client is a temporary client: purge the | |
1666 | * originator list and add the new one orig_entry | |
30cfd02b | 1667 | */ |
068ee6e2 AQ |
1668 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1669 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1670 | goto out; | |
1671 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
7072337e | 1672 | orig_node, NULL)) |
068ee6e2 AQ |
1673 | goto out_remove; |
1674 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1675 | goto add_orig_entry; | |
1676 | } | |
30cfd02b AQ |
1677 | |
1678 | /* if the client was temporary added before receiving the first | |
a6cb3909 SW |
1679 | * OGM announcing it, we have to clear the TEMP flag. Also, |
1680 | * remove the previous temporary orig node and re-add it | |
1681 | * if required. If the orig entry changed, the new one which | |
1682 | * is a non-temporary entry is preferred. | |
30cfd02b | 1683 | */ |
a6cb3909 SW |
1684 | if (common->flags & BATADV_TT_CLIENT_TEMP) { |
1685 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1686 | common->flags &= ~BATADV_TT_CLIENT_TEMP; | |
1687 | } | |
db08e6e5 | 1688 | |
e9c00136 | 1689 | /* the change can carry possible "attribute" flags like the |
54e22f26 | 1690 | * TT_CLIENT_TEMP, therefore they have to be copied in the |
e9c00136 AQ |
1691 | * client entry |
1692 | */ | |
a44ebeff LL |
1693 | if (!is_multicast_ether_addr(common->addr)) |
1694 | common->flags |= flags & (~BATADV_TT_SYNC_MASK); | |
e9c00136 | 1695 | |
acd34afa SE |
1696 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1697 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1698 | * delete + roaming change for this originator. |
1699 | * | |
1700 | * We should first delete the old originator before adding the | |
1701 | * new one. | |
1702 | */ | |
068ee6e2 | 1703 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1704 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1705 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1706 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1707 | } |
1708 | } | |
068ee6e2 | 1709 | add_orig_entry: |
30cfd02b | 1710 | /* add the new orig_entry (if needed) or update it */ |
54e22f26 LL |
1711 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn, |
1712 | flags & BATADV_TT_SYNC_MASK); | |
c6c8fea2 | 1713 | |
39c75a51 | 1714 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1715 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
f7a2bd65 | 1716 | common->addr, batadv_print_vid(common->vid), |
16052789 | 1717 | orig_node->orig); |
1e5d49fc | 1718 | ret = true; |
c6c8fea2 | 1719 | |
80b3f58c | 1720 | out_remove: |
c5caf4ef LL |
1721 | /* Do not remove multicast addresses from the local hash on |
1722 | * global additions | |
1723 | */ | |
1724 | if (is_multicast_ether_addr(tt_addr)) | |
1725 | goto out; | |
7f91d06c | 1726 | |
a73105b8 | 1727 | /* remove address from local hash if present */ |
c018ad3d | 1728 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1729 | "global tt received", |
c1d07431 | 1730 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1731 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1732 | ||
068ee6e2 AQ |
1733 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1734 | /* this is a normal global add. Therefore the client is not in a | |
1735 | * roaming state anymore. | |
1736 | */ | |
1737 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1738 | ||
7683fdc1 | 1739 | out: |
79a0bffb SE |
1740 | batadv_tt_global_entry_put(tt_global_entry); |
1741 | batadv_tt_local_entry_put(tt_local_entry); | |
7683fdc1 | 1742 | return ret; |
c6c8fea2 SE |
1743 | } |
1744 | ||
1b371d13 | 1745 | /** |
7e9a8c2c | 1746 | * batadv_transtable_best_orig() - Get best originator list entry from tt entry |
4627456a | 1747 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1748 | * @tt_global_entry: global translation table entry to be analyzed |
1749 | * | |
bccb48c8 | 1750 | * This function assumes the caller holds rcu_read_lock(). |
62fe710f | 1751 | * Return: best originator list entry or NULL on errors. |
981d8900 SE |
1752 | */ |
1753 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1754 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1755 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1756 | { |
4627456a | 1757 | struct batadv_neigh_node *router, *best_router = NULL; |
29824a55 | 1758 | struct batadv_algo_ops *bao = bat_priv->algo_ops; |
981d8900 | 1759 | struct hlist_head *head; |
981d8900 | 1760 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1761 | |
1762 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1763 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
7351a482 SW |
1764 | router = batadv_orig_router_get(orig_entry->orig_node, |
1765 | BATADV_IF_DEFAULT); | |
981d8900 SE |
1766 | if (!router) |
1767 | continue; | |
1768 | ||
4627456a | 1769 | if (best_router && |
29824a55 AQ |
1770 | bao->neigh.cmp(router, BATADV_IF_DEFAULT, best_router, |
1771 | BATADV_IF_DEFAULT) <= 0) { | |
25bb2509 | 1772 | batadv_neigh_node_put(router); |
4627456a | 1773 | continue; |
981d8900 SE |
1774 | } |
1775 | ||
4627456a | 1776 | /* release the refcount for the "old" best */ |
79a0bffb | 1777 | batadv_neigh_node_put(best_router); |
4627456a AQ |
1778 | |
1779 | best_entry = orig_entry; | |
1780 | best_router = router; | |
981d8900 SE |
1781 | } |
1782 | ||
79a0bffb | 1783 | batadv_neigh_node_put(best_router); |
4627456a | 1784 | |
981d8900 SE |
1785 | return best_entry; |
1786 | } | |
1787 | ||
d34f0550 | 1788 | /** |
7e9a8c2c | 1789 | * batadv_tt_global_dump_subentry() - Dump all TT local entries into a message |
d34f0550 MS |
1790 | * @msg: Netlink message to dump into |
1791 | * @portid: Port making netlink request | |
1792 | * @seq: Sequence number of netlink message | |
1793 | * @common: tt local & tt global common data | |
1794 | * @orig: Originator node announcing a non-mesh client | |
1795 | * @best: Is the best originator for the TT entry | |
1796 | * | |
1797 | * Return: Error code, or 0 on success | |
1798 | */ | |
1799 | static int | |
1800 | batadv_tt_global_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq, | |
1801 | struct batadv_tt_common_entry *common, | |
1802 | struct batadv_tt_orig_list_entry *orig, | |
1803 | bool best) | |
1804 | { | |
54e22f26 | 1805 | u16 flags = (common->flags & (~BATADV_TT_SYNC_MASK)) | orig->flags; |
d34f0550 MS |
1806 | void *hdr; |
1807 | struct batadv_orig_node_vlan *vlan; | |
1808 | u8 last_ttvn; | |
1809 | u32 crc; | |
1810 | ||
1811 | vlan = batadv_orig_node_vlan_get(orig->orig_node, | |
1812 | common->vid); | |
1813 | if (!vlan) | |
1814 | return 0; | |
1815 | ||
1816 | crc = vlan->tt.crc; | |
1817 | ||
1818 | batadv_orig_node_vlan_put(vlan); | |
1819 | ||
1820 | hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, | |
1821 | NLM_F_MULTI, | |
1822 | BATADV_CMD_GET_TRANSTABLE_GLOBAL); | |
1823 | if (!hdr) | |
1824 | return -ENOBUFS; | |
1825 | ||
1826 | last_ttvn = atomic_read(&orig->orig_node->last_ttvn); | |
1827 | ||
1828 | if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) || | |
1829 | nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, | |
1830 | orig->orig_node->orig) || | |
1831 | nla_put_u8(msg, BATADV_ATTR_TT_TTVN, orig->ttvn) || | |
1832 | nla_put_u8(msg, BATADV_ATTR_TT_LAST_TTVN, last_ttvn) || | |
1833 | nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) || | |
1834 | nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) || | |
54e22f26 | 1835 | nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, flags)) |
d34f0550 MS |
1836 | goto nla_put_failure; |
1837 | ||
1838 | if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) | |
1839 | goto nla_put_failure; | |
1840 | ||
1841 | genlmsg_end(msg, hdr); | |
1842 | return 0; | |
1843 | ||
1844 | nla_put_failure: | |
1845 | genlmsg_cancel(msg, hdr); | |
1846 | return -EMSGSIZE; | |
1847 | } | |
1848 | ||
1849 | /** | |
7e9a8c2c | 1850 | * batadv_tt_global_dump_entry() - Dump one TT global entry into a message |
d34f0550 MS |
1851 | * @msg: Netlink message to dump into |
1852 | * @portid: Port making netlink request | |
1853 | * @seq: Sequence number of netlink message | |
1854 | * @bat_priv: The bat priv with all the soft interface information | |
1855 | * @common: tt local & tt global common data | |
1856 | * @sub_s: Number of entries to skip | |
1857 | * | |
1858 | * This function assumes the caller holds rcu_read_lock(). | |
1859 | * | |
1860 | * Return: Error code, or 0 on success | |
1861 | */ | |
1862 | static int | |
1863 | batadv_tt_global_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, | |
1864 | struct batadv_priv *bat_priv, | |
1865 | struct batadv_tt_common_entry *common, int *sub_s) | |
1866 | { | |
1867 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; | |
1868 | struct batadv_tt_global_entry *global; | |
1869 | struct hlist_head *head; | |
1870 | int sub = 0; | |
1871 | bool best; | |
1872 | ||
1873 | global = container_of(common, struct batadv_tt_global_entry, common); | |
1874 | best_entry = batadv_transtable_best_orig(bat_priv, global); | |
1875 | head = &global->orig_list; | |
1876 | ||
1877 | hlist_for_each_entry_rcu(orig_entry, head, list) { | |
1878 | if (sub++ < *sub_s) | |
1879 | continue; | |
1880 | ||
1881 | best = (orig_entry == best_entry); | |
1882 | ||
1883 | if (batadv_tt_global_dump_subentry(msg, portid, seq, common, | |
1884 | orig_entry, best)) { | |
1885 | *sub_s = sub - 1; | |
1886 | return -EMSGSIZE; | |
1887 | } | |
1888 | } | |
1889 | ||
1890 | *sub_s = 0; | |
1891 | return 0; | |
1892 | } | |
1893 | ||
1894 | /** | |
7e9a8c2c | 1895 | * batadv_tt_global_dump_bucket() - Dump one TT local bucket into a message |
d34f0550 MS |
1896 | * @msg: Netlink message to dump into |
1897 | * @portid: Port making netlink request | |
1898 | * @seq: Sequence number of netlink message | |
1899 | * @bat_priv: The bat priv with all the soft interface information | |
1900 | * @head: Pointer to the list containing the global tt entries | |
1901 | * @idx_s: Number of entries to skip | |
1902 | * @sub: Number of entries to skip | |
1903 | * | |
1904 | * Return: Error code, or 0 on success | |
1905 | */ | |
1906 | static int | |
1907 | batadv_tt_global_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, | |
1908 | struct batadv_priv *bat_priv, | |
1909 | struct hlist_head *head, int *idx_s, int *sub) | |
1910 | { | |
1911 | struct batadv_tt_common_entry *common; | |
1912 | int idx = 0; | |
1913 | ||
1914 | rcu_read_lock(); | |
1915 | hlist_for_each_entry_rcu(common, head, hash_entry) { | |
1916 | if (idx++ < *idx_s) | |
1917 | continue; | |
1918 | ||
1919 | if (batadv_tt_global_dump_entry(msg, portid, seq, bat_priv, | |
1920 | common, sub)) { | |
1921 | rcu_read_unlock(); | |
1922 | *idx_s = idx - 1; | |
1923 | return -EMSGSIZE; | |
1924 | } | |
1925 | } | |
1926 | rcu_read_unlock(); | |
1927 | ||
1928 | *idx_s = 0; | |
1929 | *sub = 0; | |
1930 | return 0; | |
1931 | } | |
1932 | ||
1933 | /** | |
7e9a8c2c | 1934 | * batadv_tt_global_dump() - Dump TT global entries into a message |
d34f0550 MS |
1935 | * @msg: Netlink message to dump into |
1936 | * @cb: Parameters from query | |
1937 | * | |
1938 | * Return: Error code, or length of message on success | |
1939 | */ | |
1940 | int batadv_tt_global_dump(struct sk_buff *msg, struct netlink_callback *cb) | |
1941 | { | |
1942 | struct net *net = sock_net(cb->skb->sk); | |
1943 | struct net_device *soft_iface; | |
1944 | struct batadv_priv *bat_priv; | |
1945 | struct batadv_hard_iface *primary_if = NULL; | |
1946 | struct batadv_hashtable *hash; | |
1947 | struct hlist_head *head; | |
1948 | int ret; | |
1949 | int ifindex; | |
1950 | int bucket = cb->args[0]; | |
1951 | int idx = cb->args[1]; | |
1952 | int sub = cb->args[2]; | |
1953 | int portid = NETLINK_CB(cb->skb).portid; | |
1954 | ||
1955 | ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX); | |
1956 | if (!ifindex) | |
1957 | return -EINVAL; | |
1958 | ||
1959 | soft_iface = dev_get_by_index(net, ifindex); | |
1960 | if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { | |
1961 | ret = -ENODEV; | |
1962 | goto out; | |
1963 | } | |
1964 | ||
1965 | bat_priv = netdev_priv(soft_iface); | |
1966 | ||
1967 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
1968 | if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { | |
1969 | ret = -ENOENT; | |
1970 | goto out; | |
1971 | } | |
1972 | ||
1973 | hash = bat_priv->tt.global_hash; | |
1974 | ||
1975 | while (bucket < hash->size) { | |
1976 | head = &hash->table[bucket]; | |
1977 | ||
1978 | if (batadv_tt_global_dump_bucket(msg, portid, | |
1979 | cb->nlh->nlmsg_seq, bat_priv, | |
1980 | head, &idx, &sub)) | |
1981 | break; | |
1982 | ||
1983 | bucket++; | |
1984 | } | |
1985 | ||
1986 | ret = msg->len; | |
1987 | ||
1988 | out: | |
79a0bffb | 1989 | batadv_hardif_put(primary_if); |
1160dfa1 | 1990 | dev_put(soft_iface); |
d34f0550 MS |
1991 | |
1992 | cb->args[0] = bucket; | |
1993 | cb->args[1] = idx; | |
1994 | cb->args[2] = sub; | |
1995 | ||
1996 | return ret; | |
1997 | } | |
1998 | ||
1d8ab8d3 | 1999 | /** |
7e9a8c2c | 2000 | * _batadv_tt_global_del_orig_entry() - remove and free an orig_entry |
1d8ab8d3 LL |
2001 | * @tt_global_entry: the global entry to remove the orig_entry from |
2002 | * @orig_entry: the orig entry to remove and free | |
2003 | * | |
2004 | * Remove an orig_entry from its list in the given tt_global_entry and | |
2005 | * free this orig_entry afterwards. | |
433ff98f ML |
2006 | * |
2007 | * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is | |
2008 | * part of a list. | |
1d8ab8d3 LL |
2009 | */ |
2010 | static void | |
433ff98f ML |
2011 | _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry, |
2012 | struct batadv_tt_orig_list_entry *orig_entry) | |
1d8ab8d3 | 2013 | { |
2c72d655 SE |
2014 | lockdep_assert_held(&tt_global_entry->list_lock); |
2015 | ||
1d8ab8d3 LL |
2016 | batadv_tt_global_size_dec(orig_entry->orig_node, |
2017 | tt_global_entry->common.vid); | |
2018 | atomic_dec(&tt_global_entry->orig_list_count); | |
433ff98f ML |
2019 | /* requires holding tt_global_entry->list_lock and orig_entry->list |
2020 | * being part of a list | |
2021 | */ | |
1d8ab8d3 | 2022 | hlist_del_rcu(&orig_entry->list); |
7e2366c6 | 2023 | batadv_tt_orig_list_entry_put(orig_entry); |
1d8ab8d3 LL |
2024 | } |
2025 | ||
db08e6e5 | 2026 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 2027 | static void |
56303d34 | 2028 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 2029 | { |
db08e6e5 | 2030 | struct hlist_head *head; |
b67bfe0d | 2031 | struct hlist_node *safe; |
56303d34 | 2032 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 2033 | |
db08e6e5 SW |
2034 | spin_lock_bh(&tt_global_entry->list_lock); |
2035 | head = &tt_global_entry->orig_list; | |
1d8ab8d3 | 2036 | hlist_for_each_entry_safe(orig_entry, safe, head, list) |
433ff98f | 2037 | _batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry); |
db08e6e5 | 2038 | spin_unlock_bh(&tt_global_entry->list_lock); |
db08e6e5 SW |
2039 | } |
2040 | ||
1d8ab8d3 | 2041 | /** |
7e9a8c2c | 2042 | * batadv_tt_global_del_orig_node() - remove orig_node from a global tt entry |
1d8ab8d3 LL |
2043 | * @bat_priv: the bat priv with all the soft interface information |
2044 | * @tt_global_entry: the global entry to remove the orig_node from | |
2045 | * @orig_node: the originator announcing the client | |
2046 | * @message: message to append to the log on deletion | |
2047 | * | |
2048 | * Remove the given orig_node and its according orig_entry from the given | |
2049 | * global tt entry. | |
2050 | */ | |
a513088d | 2051 | static void |
1d8ab8d3 LL |
2052 | batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv, |
2053 | struct batadv_tt_global_entry *tt_global_entry, | |
2054 | struct batadv_orig_node *orig_node, | |
2055 | const char *message) | |
db08e6e5 SW |
2056 | { |
2057 | struct hlist_head *head; | |
b67bfe0d | 2058 | struct hlist_node *safe; |
56303d34 | 2059 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 2060 | unsigned short vid; |
db08e6e5 SW |
2061 | |
2062 | spin_lock_bh(&tt_global_entry->list_lock); | |
2063 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 2064 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 2065 | if (orig_entry->orig_node == orig_node) { |
16052789 | 2066 | vid = tt_global_entry->common.vid; |
39c75a51 | 2067 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 2068 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 2069 | orig_node->orig, |
16052789 | 2070 | tt_global_entry->common.addr, |
f7a2bd65 | 2071 | batadv_print_vid(vid), message); |
433ff98f ML |
2072 | _batadv_tt_global_del_orig_entry(tt_global_entry, |
2073 | orig_entry); | |
db08e6e5 SW |
2074 | } |
2075 | } | |
2076 | spin_unlock_bh(&tt_global_entry->list_lock); | |
2077 | } | |
2078 | ||
db08e6e5 | 2079 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
2080 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
2081 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 2082 | */ |
a513088d | 2083 | static void |
56303d34 SE |
2084 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
2085 | struct batadv_tt_global_entry *tt_global_entry, | |
2086 | struct batadv_orig_node *orig_node, | |
2087 | const char *message) | |
db08e6e5 SW |
2088 | { |
2089 | bool last_entry = true; | |
2090 | struct hlist_head *head; | |
56303d34 | 2091 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
2092 | |
2093 | /* no local entry exists, case 1: | |
2094 | * Check if this is the last one or if other entries exist. | |
2095 | */ | |
2096 | ||
2097 | rcu_read_lock(); | |
2098 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 2099 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
2100 | if (orig_entry->orig_node != orig_node) { |
2101 | last_entry = false; | |
2102 | break; | |
2103 | } | |
2104 | } | |
2105 | rcu_read_unlock(); | |
2106 | ||
2107 | if (last_entry) { | |
2108 | /* its the last one, mark for roaming. */ | |
acd34afa | 2109 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 2110 | tt_global_entry->roam_at = jiffies; |
1fda4c0a | 2111 | } else { |
db08e6e5 SW |
2112 | /* there is another entry, we can simply delete this |
2113 | * one and can still use the other one. | |
2114 | */ | |
1d8ab8d3 LL |
2115 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
2116 | orig_node, message); | |
1fda4c0a | 2117 | } |
db08e6e5 SW |
2118 | } |
2119 | ||
c018ad3d | 2120 | /** |
7e9a8c2c | 2121 | * batadv_tt_global_del() - remove a client from the global table |
c018ad3d AQ |
2122 | * @bat_priv: the bat priv with all the soft interface information |
2123 | * @orig_node: an originator serving this client | |
2124 | * @addr: the mac address of the client | |
2125 | * @vid: VLAN identifier | |
2126 | * @message: a message explaining the reason for deleting the client to print | |
2127 | * for debugging purpose | |
2128 | * @roaming: true if the deletion has been triggered by a roaming event | |
2129 | */ | |
56303d34 SE |
2130 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
2131 | struct batadv_orig_node *orig_node, | |
c018ad3d | 2132 | const unsigned char *addr, unsigned short vid, |
a513088d | 2133 | const char *message, bool roaming) |
a73105b8 | 2134 | { |
170173bf | 2135 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 2136 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 2137 | |
c018ad3d | 2138 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 2139 | if (!tt_global_entry) |
7683fdc1 | 2140 | goto out; |
a73105b8 | 2141 | |
db08e6e5 | 2142 | if (!roaming) { |
1d8ab8d3 LL |
2143 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
2144 | orig_node, message); | |
db08e6e5 SW |
2145 | |
2146 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
2147 | batadv_tt_global_free(bat_priv, tt_global_entry, |
2148 | message); | |
db08e6e5 SW |
2149 | |
2150 | goto out; | |
2151 | } | |
92f90f56 SE |
2152 | |
2153 | /* if we are deleting a global entry due to a roam | |
2154 | * event, there are two possibilities: | |
db08e6e5 SW |
2155 | * 1) the client roamed from node A to node B => if there |
2156 | * is only one originator left for this client, we mark | |
acd34afa | 2157 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
2158 | * wait for node B to claim it. In case of timeout |
2159 | * the entry is purged. | |
db08e6e5 SW |
2160 | * |
2161 | * If there are other originators left, we directly delete | |
2162 | * the originator. | |
92f90f56 | 2163 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
2164 | * the global entry, since it is useless now. |
2165 | */ | |
a513088d | 2166 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
2167 | tt_global_entry->common.addr, |
2168 | vid); | |
a513088d | 2169 | if (local_entry) { |
db08e6e5 | 2170 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 2171 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 2172 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
1fda4c0a | 2173 | } else { |
db08e6e5 | 2174 | /* no local entry exists, case 1: check for roaming */ |
a513088d SE |
2175 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
2176 | orig_node, message); | |
1fda4c0a | 2177 | } |
92f90f56 | 2178 | |
cc47f66e | 2179 | out: |
79a0bffb SE |
2180 | batadv_tt_global_entry_put(tt_global_entry); |
2181 | batadv_tt_local_entry_put(local_entry); | |
a73105b8 AQ |
2182 | } |
2183 | ||
95fb130d | 2184 | /** |
7e9a8c2c SE |
2185 | * batadv_tt_global_del_orig() - remove all the TT global entries belonging to |
2186 | * the given originator matching the provided vid | |
95fb130d AQ |
2187 | * @bat_priv: the bat priv with all the soft interface information |
2188 | * @orig_node: the originator owning the entries to remove | |
2189 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
2190 | * removed | |
2191 | * @message: debug message to print as "reason" | |
2192 | */ | |
56303d34 SE |
2193 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
2194 | struct batadv_orig_node *orig_node, | |
6b5e971a | 2195 | s32 match_vid, |
56303d34 | 2196 | const char *message) |
c6c8fea2 | 2197 | { |
56303d34 SE |
2198 | struct batadv_tt_global_entry *tt_global; |
2199 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 2200 | u32 i; |
807736f6 | 2201 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 2202 | struct hlist_node *safe; |
a73105b8 | 2203 | struct hlist_head *head; |
7683fdc1 | 2204 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 2205 | unsigned short vid; |
c6c8fea2 | 2206 | |
6e801494 SW |
2207 | if (!hash) |
2208 | return; | |
2209 | ||
a73105b8 AQ |
2210 | for (i = 0; i < hash->size; i++) { |
2211 | head = &hash->table[i]; | |
7683fdc1 | 2212 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 2213 | |
7683fdc1 | 2214 | spin_lock_bh(list_lock); |
b67bfe0d | 2215 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 2216 | head, hash_entry) { |
95fb130d AQ |
2217 | /* remove only matching entries */ |
2218 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
2219 | continue; | |
2220 | ||
56303d34 SE |
2221 | tt_global = container_of(tt_common_entry, |
2222 | struct batadv_tt_global_entry, | |
2223 | common); | |
db08e6e5 | 2224 | |
1d8ab8d3 LL |
2225 | batadv_tt_global_del_orig_node(bat_priv, tt_global, |
2226 | orig_node, message); | |
db08e6e5 | 2227 | |
56303d34 | 2228 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 2229 | vid = tt_global->common.vid; |
39c75a51 | 2230 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
2231 | "Deleting global tt entry %pM (vid: %d): %s\n", |
2232 | tt_global->common.addr, | |
f7a2bd65 | 2233 | batadv_print_vid(vid), message); |
b67bfe0d | 2234 | hlist_del_rcu(&tt_common_entry->hash_entry); |
5dafd8a6 | 2235 | batadv_tt_global_entry_put(tt_global); |
7683fdc1 | 2236 | } |
a73105b8 | 2237 | } |
7683fdc1 | 2238 | spin_unlock_bh(list_lock); |
c6c8fea2 | 2239 | } |
ac4eebd4 | 2240 | clear_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
c6c8fea2 SE |
2241 | } |
2242 | ||
30cfd02b AQ |
2243 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
2244 | char **msg) | |
cc47f66e | 2245 | { |
30cfd02b AQ |
2246 | bool purge = false; |
2247 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
2248 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 2249 | |
30cfd02b AQ |
2250 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
2251 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
2252 | purge = true; | |
2253 | *msg = "Roaming timeout\n"; | |
2254 | } | |
42d0b044 | 2255 | |
30cfd02b AQ |
2256 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
2257 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
2258 | purge = true; | |
2259 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 2260 | } |
30cfd02b AQ |
2261 | |
2262 | return purge; | |
42d0b044 SE |
2263 | } |
2264 | ||
30cfd02b | 2265 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 2266 | { |
807736f6 | 2267 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 2268 | struct hlist_head *head; |
b67bfe0d | 2269 | struct hlist_node *node_tmp; |
7683fdc1 | 2270 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 2271 | u32 i; |
30cfd02b AQ |
2272 | char *msg = NULL; |
2273 | struct batadv_tt_common_entry *tt_common; | |
2274 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 2275 | |
cc47f66e AQ |
2276 | for (i = 0; i < hash->size; i++) { |
2277 | head = &hash->table[i]; | |
7683fdc1 | 2278 | list_lock = &hash->list_locks[i]; |
cc47f66e | 2279 | |
7683fdc1 | 2280 | spin_lock_bh(list_lock); |
b67bfe0d | 2281 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
2282 | hash_entry) { |
2283 | tt_global = container_of(tt_common, | |
2284 | struct batadv_tt_global_entry, | |
2285 | common); | |
2286 | ||
2287 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
2288 | continue; | |
2289 | ||
2290 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
2291 | "Deleting global tt entry %pM (vid: %d): %s\n", |
2292 | tt_global->common.addr, | |
f7a2bd65 | 2293 | batadv_print_vid(tt_global->common.vid), |
16052789 | 2294 | msg); |
30cfd02b | 2295 | |
b67bfe0d | 2296 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b | 2297 | |
5dafd8a6 | 2298 | batadv_tt_global_entry_put(tt_global); |
30cfd02b | 2299 | } |
7683fdc1 | 2300 | spin_unlock_bh(list_lock); |
cc47f66e | 2301 | } |
cc47f66e AQ |
2302 | } |
2303 | ||
56303d34 | 2304 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 2305 | { |
5bf74e9c | 2306 | struct batadv_hashtable *hash; |
7683fdc1 | 2307 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
2308 | struct batadv_tt_common_entry *tt_common_entry; |
2309 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 2310 | struct hlist_node *node_tmp; |
7683fdc1 | 2311 | struct hlist_head *head; |
6b5e971a | 2312 | u32 i; |
7683fdc1 | 2313 | |
807736f6 | 2314 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
2315 | return; |
2316 | ||
807736f6 | 2317 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
2318 | |
2319 | for (i = 0; i < hash->size; i++) { | |
2320 | head = &hash->table[i]; | |
2321 | list_lock = &hash->list_locks[i]; | |
2322 | ||
2323 | spin_lock_bh(list_lock); | |
b67bfe0d | 2324 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 2325 | head, hash_entry) { |
b67bfe0d | 2326 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
2327 | tt_global = container_of(tt_common_entry, |
2328 | struct batadv_tt_global_entry, | |
2329 | common); | |
5dafd8a6 | 2330 | batadv_tt_global_entry_put(tt_global); |
7683fdc1 AQ |
2331 | } |
2332 | spin_unlock_bh(list_lock); | |
2333 | } | |
2334 | ||
1a8eaf07 | 2335 | batadv_hash_destroy(hash); |
7683fdc1 | 2336 | |
807736f6 | 2337 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
2338 | } |
2339 | ||
56303d34 SE |
2340 | static bool |
2341 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
2342 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd | 2343 | { |
acd34afa SE |
2344 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
2345 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
75ae84a4 | 2346 | return true; |
59b699cd | 2347 | |
2d2fcc2a AQ |
2348 | /* check if the two clients are marked as isolated */ |
2349 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
2350 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
75ae84a4 | 2351 | return true; |
2d2fcc2a | 2352 | |
75ae84a4 | 2353 | return false; |
59b699cd AQ |
2354 | } |
2355 | ||
c018ad3d | 2356 | /** |
7e9a8c2c | 2357 | * batadv_transtable_search() - get the mesh destination for a given client |
c018ad3d AQ |
2358 | * @bat_priv: the bat priv with all the soft interface information |
2359 | * @src: mac address of the source client | |
2360 | * @addr: mac address of the destination client | |
2361 | * @vid: VLAN identifier | |
2362 | * | |
62fe710f | 2363 | * Return: a pointer to the originator that was selected as destination in the |
c018ad3d AQ |
2364 | * mesh for contacting the client 'addr', NULL otherwise. |
2365 | * In case of multiple originators serving the same client, the function returns | |
2366 | * the best one (best in terms of metric towards the destination node). | |
2367 | * | |
2368 | * If the two clients are AP isolated the function returns NULL. | |
2369 | */ | |
56303d34 | 2370 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
6b5e971a SE |
2371 | const u8 *src, |
2372 | const u8 *addr, | |
c018ad3d | 2373 | unsigned short vid) |
c6c8fea2 | 2374 | { |
56303d34 SE |
2375 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2376 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
2377 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 2378 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 2379 | |
eceb22ae | 2380 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 2381 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
2382 | if (!tt_local_entry || |
2383 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
2384 | goto out; |
2385 | } | |
7aadf889 | 2386 | |
c018ad3d | 2387 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 2388 | if (!tt_global_entry) |
7b36e8ee | 2389 | goto out; |
7aadf889 | 2390 | |
3d393e47 | 2391 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
2392 | * isolation |
2393 | */ | |
a513088d SE |
2394 | if (tt_local_entry && |
2395 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
2396 | goto out; |
2397 | ||
db08e6e5 | 2398 | rcu_read_lock(); |
4627456a | 2399 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 2400 | /* found anything? */ |
981d8900 SE |
2401 | if (best_entry) |
2402 | orig_node = best_entry->orig_node; | |
7c124391 | 2403 | if (orig_node && !kref_get_unless_zero(&orig_node->refcount)) |
db08e6e5 SW |
2404 | orig_node = NULL; |
2405 | rcu_read_unlock(); | |
981d8900 | 2406 | |
7b36e8ee | 2407 | out: |
79a0bffb SE |
2408 | batadv_tt_global_entry_put(tt_global_entry); |
2409 | batadv_tt_local_entry_put(tt_local_entry); | |
3d393e47 | 2410 | |
7b36e8ee | 2411 | return orig_node; |
c6c8fea2 | 2412 | } |
a73105b8 | 2413 | |
ced72933 | 2414 | /** |
7e9a8c2c | 2415 | * batadv_tt_global_crc() - calculates the checksum of the local table belonging |
ced72933 AQ |
2416 | * to the given orig_node |
2417 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 2418 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 2419 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2420 | * |
2421 | * This function computes the checksum for the global table corresponding to a | |
2422 | * specific originator. In particular, the checksum is computed as follows: For | |
2423 | * each client connected to the originator the CRC32C of the MAC address and the | |
2424 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
2425 | * together. | |
2426 | * | |
2427 | * The idea behind is that CRC32C should be used as much as possible in order to | |
2428 | * produce a unique hash of the table, but since the order which is used to feed | |
2429 | * the CRC32C function affects the result and since every node in the network | |
2430 | * probably sorts the clients differently, the hash function cannot be directly | |
2431 | * computed over the entire table. Hence the CRC32C is used only on | |
2432 | * the single client entry, while all the results are then xor'ed together | |
2433 | * because the XOR operation can combine them all while trying to reduce the | |
2434 | * noise as much as possible. | |
2435 | * | |
62fe710f | 2436 | * Return: the checksum of the global table of a given originator. |
ced72933 | 2437 | */ |
6b5e971a SE |
2438 | static u32 batadv_tt_global_crc(struct batadv_priv *bat_priv, |
2439 | struct batadv_orig_node *orig_node, | |
2440 | unsigned short vid) | |
a73105b8 | 2441 | { |
807736f6 | 2442 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
54e22f26 | 2443 | struct batadv_tt_orig_list_entry *tt_orig; |
56303d34 SE |
2444 | struct batadv_tt_common_entry *tt_common; |
2445 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 2446 | struct hlist_head *head; |
6b5e971a SE |
2447 | u32 i, crc_tmp, crc = 0; |
2448 | u8 flags; | |
a30e22ca | 2449 | __be16 tmp_vid; |
a73105b8 AQ |
2450 | |
2451 | for (i = 0; i < hash->size; i++) { | |
2452 | head = &hash->table[i]; | |
2453 | ||
2454 | rcu_read_lock(); | |
b67bfe0d | 2455 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
2456 | tt_global = container_of(tt_common, |
2457 | struct batadv_tt_global_entry, | |
2458 | common); | |
7ea7b4a1 AQ |
2459 | /* compute the CRC only for entries belonging to the |
2460 | * VLAN identified by the vid passed as parameter | |
2461 | */ | |
2462 | if (tt_common->vid != vid) | |
2463 | continue; | |
2464 | ||
db08e6e5 SW |
2465 | /* Roaming clients are in the global table for |
2466 | * consistency only. They don't have to be | |
2467 | * taken into account while computing the | |
2468 | * global crc | |
2469 | */ | |
acd34afa | 2470 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 2471 | continue; |
30cfd02b AQ |
2472 | /* Temporary clients have not been announced yet, so |
2473 | * they have to be skipped while computing the global | |
2474 | * crc | |
2475 | */ | |
2476 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2477 | continue; | |
db08e6e5 SW |
2478 | |
2479 | /* find out if this global entry is announced by this | |
2480 | * originator | |
2481 | */ | |
54e22f26 LL |
2482 | tt_orig = batadv_tt_global_orig_entry_find(tt_global, |
2483 | orig_node); | |
2484 | if (!tt_orig) | |
db08e6e5 SW |
2485 | continue; |
2486 | ||
a30e22ca AQ |
2487 | /* use network order to read the VID: this ensures that |
2488 | * every node reads the bytes in the same order. | |
2489 | */ | |
2490 | tmp_vid = htons(tt_common->vid); | |
2491 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2492 | |
2493 | /* compute the CRC on flags that have to be kept in sync | |
2494 | * among nodes | |
2495 | */ | |
54e22f26 | 2496 | flags = tt_orig->flags; |
0eb01568 AQ |
2497 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); |
2498 | ||
0ffa9e8d | 2499 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
54e22f26 LL |
2500 | |
2501 | batadv_tt_orig_list_entry_put(tt_orig); | |
a73105b8 AQ |
2502 | } |
2503 | rcu_read_unlock(); | |
2504 | } | |
2505 | ||
ced72933 | 2506 | return crc; |
a73105b8 AQ |
2507 | } |
2508 | ||
ced72933 | 2509 | /** |
7e9a8c2c | 2510 | * batadv_tt_local_crc() - calculates the checksum of the local table |
ced72933 | 2511 | * @bat_priv: the bat priv with all the soft interface information |
7ea7b4a1 | 2512 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2513 | * |
2514 | * For details about the computation, please refer to the documentation for | |
2515 | * batadv_tt_global_crc(). | |
2516 | * | |
62fe710f | 2517 | * Return: the checksum of the local table |
ced72933 | 2518 | */ |
6b5e971a SE |
2519 | static u32 batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2520 | unsigned short vid) | |
a73105b8 | 2521 | { |
807736f6 | 2522 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2523 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2524 | struct hlist_head *head; |
6b5e971a SE |
2525 | u32 i, crc_tmp, crc = 0; |
2526 | u8 flags; | |
a30e22ca | 2527 | __be16 tmp_vid; |
a73105b8 AQ |
2528 | |
2529 | for (i = 0; i < hash->size; i++) { | |
2530 | head = &hash->table[i]; | |
2531 | ||
2532 | rcu_read_lock(); | |
b67bfe0d | 2533 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2534 | /* compute the CRC only for entries belonging to the |
2535 | * VLAN identified by vid | |
2536 | */ | |
2537 | if (tt_common->vid != vid) | |
2538 | continue; | |
2539 | ||
058d0e26 | 2540 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2541 | * account while computing the CRC |
2542 | */ | |
acd34afa | 2543 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2544 | continue; |
ced72933 | 2545 | |
a30e22ca AQ |
2546 | /* use network order to read the VID: this ensures that |
2547 | * every node reads the bytes in the same order. | |
2548 | */ | |
2549 | tmp_vid = htons(tt_common->vid); | |
2550 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2551 | |
2552 | /* compute the CRC on flags that have to be kept in sync | |
2553 | * among nodes | |
2554 | */ | |
2555 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2556 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2557 | ||
0ffa9e8d | 2558 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2559 | } |
a73105b8 AQ |
2560 | rcu_read_unlock(); |
2561 | } | |
2562 | ||
ced72933 | 2563 | return crc; |
a73105b8 AQ |
2564 | } |
2565 | ||
9c4604a2 | 2566 | /** |
7e9a8c2c | 2567 | * batadv_tt_req_node_release() - free tt_req node entry |
9c4604a2 SE |
2568 | * @ref: kref pointer of the tt req_node entry |
2569 | */ | |
2570 | static void batadv_tt_req_node_release(struct kref *ref) | |
2571 | { | |
2572 | struct batadv_tt_req_node *tt_req_node; | |
2573 | ||
2574 | tt_req_node = container_of(ref, struct batadv_tt_req_node, refcount); | |
2575 | ||
86452f81 | 2576 | kmem_cache_free(batadv_tt_req_cache, tt_req_node); |
9c4604a2 SE |
2577 | } |
2578 | ||
2579 | /** | |
7e9a8c2c | 2580 | * batadv_tt_req_node_put() - decrement the tt_req_node refcounter and |
9c4604a2 SE |
2581 | * possibly release it |
2582 | * @tt_req_node: tt_req_node to be free'd | |
2583 | */ | |
2584 | static void batadv_tt_req_node_put(struct batadv_tt_req_node *tt_req_node) | |
2585 | { | |
6340dcbd SE |
2586 | if (!tt_req_node) |
2587 | return; | |
2588 | ||
9c4604a2 SE |
2589 | kref_put(&tt_req_node->refcount, batadv_tt_req_node_release); |
2590 | } | |
2591 | ||
56303d34 | 2592 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2593 | { |
7c26a53b ML |
2594 | struct batadv_tt_req_node *node; |
2595 | struct hlist_node *safe; | |
a73105b8 | 2596 | |
807736f6 | 2597 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2598 | |
7c26a53b ML |
2599 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
2600 | hlist_del_init(&node->list); | |
9c4604a2 | 2601 | batadv_tt_req_node_put(node); |
a73105b8 AQ |
2602 | } |
2603 | ||
807736f6 | 2604 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2605 | } |
2606 | ||
56303d34 SE |
2607 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2608 | struct batadv_orig_node *orig_node, | |
e8cf234a | 2609 | const void *tt_buff, |
6b5e971a | 2610 | u16 tt_buff_len) |
a73105b8 | 2611 | { |
a73105b8 | 2612 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2613 | * last OGM (the OGM could carry no changes) |
2614 | */ | |
a73105b8 AQ |
2615 | spin_lock_bh(&orig_node->tt_buff_lock); |
2616 | if (tt_buff_len > 0) { | |
2617 | kfree(orig_node->tt_buff); | |
2618 | orig_node->tt_buff_len = 0; | |
2619 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2620 | if (orig_node->tt_buff) { | |
2621 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2622 | orig_node->tt_buff_len = tt_buff_len; | |
2623 | } | |
2624 | } | |
2625 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2626 | } | |
2627 | ||
56303d34 | 2628 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2629 | { |
7c26a53b ML |
2630 | struct batadv_tt_req_node *node; |
2631 | struct hlist_node *safe; | |
a73105b8 | 2632 | |
807736f6 | 2633 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2634 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
42d0b044 SE |
2635 | if (batadv_has_timed_out(node->issued_at, |
2636 | BATADV_TT_REQUEST_TIMEOUT)) { | |
7c26a53b | 2637 | hlist_del_init(&node->list); |
9c4604a2 | 2638 | batadv_tt_req_node_put(node); |
a73105b8 AQ |
2639 | } |
2640 | } | |
807736f6 | 2641 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2642 | } |
2643 | ||
383b8636 | 2644 | /** |
7e9a8c2c | 2645 | * batadv_tt_req_node_new() - search and possibly create a tt_req_node object |
383b8636 ML |
2646 | * @bat_priv: the bat priv with all the soft interface information |
2647 | * @orig_node: orig node this request is being issued for | |
2648 | * | |
62fe710f | 2649 | * Return: the pointer to the new tt_req_node struct if no request |
383b8636 | 2650 | * has already been issued for this orig_node, NULL otherwise. |
9cfc7bd6 | 2651 | */ |
56303d34 | 2652 | static struct batadv_tt_req_node * |
383b8636 | 2653 | batadv_tt_req_node_new(struct batadv_priv *bat_priv, |
56303d34 | 2654 | struct batadv_orig_node *orig_node) |
a73105b8 | 2655 | { |
56303d34 | 2656 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2657 | |
807736f6 | 2658 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2659 | hlist_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { |
1eda58bf SE |
2660 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2661 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2662 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2663 | goto unlock; |
2664 | } | |
2665 | ||
86452f81 | 2666 | tt_req_node = kmem_cache_alloc(batadv_tt_req_cache, GFP_ATOMIC); |
a73105b8 AQ |
2667 | if (!tt_req_node) |
2668 | goto unlock; | |
2669 | ||
9c4604a2 | 2670 | kref_init(&tt_req_node->refcount); |
8fdd0153 | 2671 | ether_addr_copy(tt_req_node->addr, orig_node->orig); |
a73105b8 AQ |
2672 | tt_req_node->issued_at = jiffies; |
2673 | ||
9c4604a2 | 2674 | kref_get(&tt_req_node->refcount); |
7c26a53b | 2675 | hlist_add_head(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2676 | unlock: |
807736f6 | 2677 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2678 | return tt_req_node; |
2679 | } | |
2680 | ||
335fbe0f | 2681 | /** |
7072337e | 2682 | * batadv_tt_local_valid() - verify local tt entry and get flags |
335fbe0f ML |
2683 | * @entry_ptr: to be checked local tt entry |
2684 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
7072337e LL |
2685 | * @flags: a pointer to store TT flags for this client to |
2686 | * | |
2687 | * Checks the validity of the given local TT entry. If it is, then the provided | |
2688 | * flags pointer is updated. | |
335fbe0f | 2689 | * |
4b426b10 | 2690 | * Return: true if the entry is a valid, false otherwise. |
335fbe0f | 2691 | */ |
7072337e LL |
2692 | static bool batadv_tt_local_valid(const void *entry_ptr, |
2693 | const void *data_ptr, | |
2694 | u8 *flags) | |
058d0e26 | 2695 | { |
56303d34 | 2696 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2697 | |
acd34afa | 2698 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
4b426b10 | 2699 | return false; |
7072337e LL |
2700 | |
2701 | if (flags) | |
2702 | *flags = tt_common_entry->flags; | |
2703 | ||
4b426b10 | 2704 | return true; |
058d0e26 AQ |
2705 | } |
2706 | ||
7072337e LL |
2707 | /** |
2708 | * batadv_tt_global_valid() - verify global tt entry and get flags | |
2709 | * @entry_ptr: to be checked global tt entry | |
2710 | * @data_ptr: an orig_node object (may be NULL) | |
2711 | * @flags: a pointer to store TT flags for this client to | |
2712 | * | |
2713 | * Checks the validity of the given global TT entry. If it is, then the provided | |
2714 | * flags pointer is updated either with the common (summed) TT flags if data_ptr | |
2715 | * is NULL or the specific, per originator TT flags otherwise. | |
2716 | * | |
2717 | * Return: true if the entry is a valid, false otherwise. | |
2718 | */ | |
4b426b10 | 2719 | static bool batadv_tt_global_valid(const void *entry_ptr, |
7072337e LL |
2720 | const void *data_ptr, |
2721 | u8 *flags) | |
a73105b8 | 2722 | { |
56303d34 SE |
2723 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2724 | const struct batadv_tt_global_entry *tt_global_entry; | |
2725 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2726 | |
30cfd02b AQ |
2727 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2728 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
4b426b10 | 2729 | return false; |
cc47f66e | 2730 | |
56303d34 SE |
2731 | tt_global_entry = container_of(tt_common_entry, |
2732 | struct batadv_tt_global_entry, | |
48100bac AQ |
2733 | common); |
2734 | ||
7072337e LL |
2735 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node, |
2736 | flags); | |
a73105b8 AQ |
2737 | } |
2738 | ||
335fbe0f | 2739 | /** |
7e9a8c2c | 2740 | * batadv_tt_tvlv_generate() - fill the tvlv buff with the tt entries from the |
7ea7b4a1 | 2741 | * specified tt hash |
335fbe0f ML |
2742 | * @bat_priv: the bat priv with all the soft interface information |
2743 | * @hash: hash table containing the tt entries | |
2744 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2745 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
7072337e | 2746 | * @valid_cb: function to filter tt change entries and to return TT flags |
335fbe0f | 2747 | * @cb_data: data passed to the filter function as argument |
7072337e LL |
2748 | * |
2749 | * Fills the tvlv buff with the tt entries from the specified hash. If valid_cb | |
2750 | * is not provided then this becomes a no-op. | |
335fbe0f | 2751 | */ |
7ea7b4a1 AQ |
2752 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2753 | struct batadv_hashtable *hash, | |
6b5e971a | 2754 | void *tvlv_buff, u16 tt_len, |
4b426b10 | 2755 | bool (*valid_cb)(const void *, |
7072337e LL |
2756 | const void *, |
2757 | u8 *flags), | |
7ea7b4a1 | 2758 | void *cb_data) |
a73105b8 | 2759 | { |
56303d34 | 2760 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2761 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2762 | struct hlist_head *head; |
6b5e971a | 2763 | u16 tt_tot, tt_num_entries = 0; |
7072337e LL |
2764 | u8 flags; |
2765 | bool ret; | |
6b5e971a | 2766 | u32 i; |
a73105b8 | 2767 | |
298e6e68 | 2768 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2769 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 | 2770 | |
7072337e LL |
2771 | if (!valid_cb) |
2772 | return; | |
2773 | ||
a73105b8 AQ |
2774 | rcu_read_lock(); |
2775 | for (i = 0; i < hash->size; i++) { | |
2776 | head = &hash->table[i]; | |
2777 | ||
b67bfe0d | 2778 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2779 | head, hash_entry) { |
335fbe0f | 2780 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2781 | break; |
2782 | ||
7072337e LL |
2783 | ret = valid_cb(tt_common_entry, cb_data, &flags); |
2784 | if (!ret) | |
a73105b8 AQ |
2785 | continue; |
2786 | ||
8fdd0153 | 2787 | ether_addr_copy(tt_change->addr, tt_common_entry->addr); |
7072337e | 2788 | tt_change->flags = flags; |
c018ad3d | 2789 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
2790 | memset(tt_change->reserved, 0, |
2791 | sizeof(tt_change->reserved)); | |
a73105b8 | 2792 | |
335fbe0f | 2793 | tt_num_entries++; |
a73105b8 AQ |
2794 | tt_change++; |
2795 | } | |
2796 | } | |
2797 | rcu_read_unlock(); | |
7ea7b4a1 | 2798 | } |
a73105b8 | 2799 | |
7ea7b4a1 | 2800 | /** |
7e9a8c2c | 2801 | * batadv_tt_global_check_crc() - check if all the CRCs are correct |
7ea7b4a1 AQ |
2802 | * @orig_node: originator for which the CRCs have to be checked |
2803 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2804 | * @num_vlan: number of tvlv VLAN entries | |
7ea7b4a1 | 2805 | * |
62fe710f | 2806 | * Return: true if all the received CRCs match the locally stored ones, false |
7ea7b4a1 AQ |
2807 | * otherwise |
2808 | */ | |
2809 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2810 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
6b5e971a | 2811 | u16 num_vlan) |
7ea7b4a1 AQ |
2812 | { |
2813 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2814 | struct batadv_orig_node_vlan *vlan; | |
c169c59d | 2815 | int i, orig_num_vlan; |
6b5e971a | 2816 | u32 crc; |
7ea7b4a1 AQ |
2817 | |
2818 | /* check if each received CRC matches the locally stored one */ | |
2819 | for (i = 0; i < num_vlan; i++) { | |
2820 | tt_vlan_tmp = tt_vlan + i; | |
2821 | ||
2822 | /* if orig_node is a backbone node for this VLAN, don't check | |
2823 | * the CRC as we ignore all the global entries over it | |
2824 | */ | |
2825 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2826 | orig_node->orig, |
2827 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2828 | continue; |
2829 | ||
2830 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2831 | ntohs(tt_vlan_tmp->vid)); | |
2832 | if (!vlan) | |
2833 | return false; | |
2834 | ||
91c2b1a9 | 2835 | crc = vlan->tt.crc; |
21754e25 | 2836 | batadv_orig_node_vlan_put(vlan); |
91c2b1a9 AQ |
2837 | |
2838 | if (crc != ntohl(tt_vlan_tmp->crc)) | |
7ea7b4a1 AQ |
2839 | return false; |
2840 | } | |
2841 | ||
c169c59d SW |
2842 | /* check if any excess VLANs exist locally for the originator |
2843 | * which are not mentioned in the TVLV from the originator. | |
2844 | */ | |
2845 | rcu_read_lock(); | |
2846 | orig_num_vlan = 0; | |
2847 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) | |
2848 | orig_num_vlan++; | |
2849 | rcu_read_unlock(); | |
2850 | ||
2851 | if (orig_num_vlan > num_vlan) | |
2852 | return false; | |
2853 | ||
7ea7b4a1 AQ |
2854 | return true; |
2855 | } | |
2856 | ||
2857 | /** | |
7e9a8c2c | 2858 | * batadv_tt_local_update_crc() - update all the local CRCs |
7ea7b4a1 AQ |
2859 | * @bat_priv: the bat priv with all the soft interface information |
2860 | */ | |
2861 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2862 | { | |
2863 | struct batadv_softif_vlan *vlan; | |
2864 | ||
2865 | /* recompute the global CRC for each VLAN */ | |
2866 | rcu_read_lock(); | |
2867 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2868 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2869 | } | |
2870 | rcu_read_unlock(); | |
2871 | } | |
2872 | ||
2873 | /** | |
7e9a8c2c | 2874 | * batadv_tt_global_update_crc() - update all the global CRCs for this orig_node |
7ea7b4a1 AQ |
2875 | * @bat_priv: the bat priv with all the soft interface information |
2876 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2877 | */ | |
2878 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2879 | struct batadv_orig_node *orig_node) | |
2880 | { | |
2881 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 2882 | u32 crc; |
7ea7b4a1 AQ |
2883 | |
2884 | /* recompute the global CRC for each VLAN */ | |
2885 | rcu_read_lock(); | |
d0fa4f3f | 2886 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
2887 | /* if orig_node is a backbone node for this VLAN, don't compute |
2888 | * the CRC as we ignore all the global entries over it | |
2889 | */ | |
cfd4f757 AQ |
2890 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2891 | vlan->vid)) | |
7ea7b4a1 AQ |
2892 | continue; |
2893 | ||
2894 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2895 | vlan->tt.crc = crc; | |
2896 | } | |
2897 | rcu_read_unlock(); | |
a73105b8 AQ |
2898 | } |
2899 | ||
ced72933 | 2900 | /** |
7e9a8c2c | 2901 | * batadv_send_tt_request() - send a TT Request message to a given node |
ced72933 AQ |
2902 | * @bat_priv: the bat priv with all the soft interface information |
2903 | * @dst_orig_node: the destination of the message | |
2904 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
2905 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
2906 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
2907 | * @full_table: ask for the entire translation table if true, while only for the |
2908 | * last TT diff otherwise | |
d15cd622 AQ |
2909 | * |
2910 | * Return: true if the TT Request was sent, false otherwise | |
ced72933 | 2911 | */ |
4b426b10 SE |
2912 | static bool batadv_send_tt_request(struct batadv_priv *bat_priv, |
2913 | struct batadv_orig_node *dst_orig_node, | |
2914 | u8 ttvn, | |
2915 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2916 | u16 num_vlan, bool full_table) | |
a73105b8 | 2917 | { |
335fbe0f | 2918 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2919 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
2920 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
2921 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 2922 | bool ret = false; |
7ea7b4a1 | 2923 | int i, size; |
a73105b8 | 2924 | |
e5d89254 | 2925 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2926 | if (!primary_if) |
2927 | goto out; | |
2928 | ||
2929 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
2930 | * reply from the same orig_node yet |
2931 | */ | |
383b8636 | 2932 | tt_req_node = batadv_tt_req_node_new(bat_priv, dst_orig_node); |
a73105b8 AQ |
2933 | if (!tt_req_node) |
2934 | goto out; | |
2935 | ||
7ea7b4a1 AQ |
2936 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
2937 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 2938 | if (!tvlv_tt_data) |
a73105b8 AQ |
2939 | goto out; |
2940 | ||
335fbe0f ML |
2941 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
2942 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
2943 | tvlv_tt_data->num_vlan = htons(num_vlan); |
2944 | ||
2945 | /* send all the CRCs within the request. This is needed by intermediate | |
2946 | * nodes to ensure they have the correct table before replying | |
2947 | */ | |
2948 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
2949 | for (i = 0; i < num_vlan; i++) { | |
2950 | tt_vlan_req->vid = tt_vlan->vid; | |
2951 | tt_vlan_req->crc = tt_vlan->crc; | |
2952 | ||
2953 | tt_vlan_req++; | |
2954 | tt_vlan++; | |
2955 | } | |
a73105b8 AQ |
2956 | |
2957 | if (full_table) | |
335fbe0f | 2958 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2959 | |
bb351ba0 | 2960 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 2961 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 2962 | |
d69909d2 | 2963 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
2964 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2965 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 2966 | tvlv_tt_data, size); |
335fbe0f | 2967 | ret = true; |
a73105b8 AQ |
2968 | |
2969 | out: | |
79a0bffb | 2970 | batadv_hardif_put(primary_if); |
9c4604a2 | 2971 | |
a73105b8 | 2972 | if (ret && tt_req_node) { |
807736f6 | 2973 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
9c4604a2 SE |
2974 | if (!hlist_unhashed(&tt_req_node->list)) { |
2975 | hlist_del_init(&tt_req_node->list); | |
2976 | batadv_tt_req_node_put(tt_req_node); | |
2977 | } | |
807736f6 | 2978 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2979 | } |
9c4604a2 | 2980 | |
79a0bffb | 2981 | batadv_tt_req_node_put(tt_req_node); |
9c4604a2 | 2982 | |
335fbe0f | 2983 | kfree(tvlv_tt_data); |
a73105b8 AQ |
2984 | return ret; |
2985 | } | |
2986 | ||
335fbe0f | 2987 | /** |
7e9a8c2c | 2988 | * batadv_send_other_tt_response() - send reply to tt request concerning another |
335fbe0f ML |
2989 | * node's translation table |
2990 | * @bat_priv: the bat priv with all the soft interface information | |
2991 | * @tt_data: tt data containing the tt request information | |
2992 | * @req_src: mac address of tt request sender | |
2993 | * @req_dst: mac address of tt request recipient | |
2994 | * | |
62fe710f | 2995 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
2996 | */ |
2997 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
2998 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2999 | u8 *req_src, u8 *req_dst) |
a73105b8 | 3000 | { |
170173bf | 3001 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 3002 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 3003 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 3004 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 3005 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 3006 | bool ret = false, full_table; |
6b5e971a SE |
3007 | u8 orig_ttvn, req_ttvn; |
3008 | u16 tvlv_len; | |
3009 | s32 tt_len; | |
a73105b8 | 3010 | |
39c75a51 | 3011 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3012 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f | 3013 | req_src, tt_data->ttvn, req_dst, |
a2f2b6cd | 3014 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 AQ |
3015 | |
3016 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 3017 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
3018 | if (!req_dst_orig_node) |
3019 | goto out; | |
3020 | ||
335fbe0f | 3021 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
3022 | if (!res_dst_orig_node) |
3023 | goto out; | |
3024 | ||
6b5e971a | 3025 | orig_ttvn = (u8)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 3026 | req_ttvn = tt_data->ttvn; |
a73105b8 | 3027 | |
7ea7b4a1 | 3028 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 3029 | /* this node doesn't have the requested data */ |
a73105b8 | 3030 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
3031 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
3032 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
3033 | goto out; |
3034 | ||
015758d0 | 3035 | /* If the full table has been explicitly requested */ |
335fbe0f | 3036 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
3037 | !req_dst_orig_node->tt_buff) |
3038 | full_table = true; | |
3039 | else | |
3040 | full_table = false; | |
3041 | ||
335fbe0f ML |
3042 | /* TT fragmentation hasn't been implemented yet, so send as many |
3043 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 3044 | */ |
a73105b8 AQ |
3045 | if (!full_table) { |
3046 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
3047 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 3048 | |
7ea7b4a1 AQ |
3049 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
3050 | &tvlv_tt_data, | |
3051 | &tt_change, | |
3052 | &tt_len); | |
3053 | if (!tt_len) | |
a73105b8 AQ |
3054 | goto unlock; |
3055 | ||
a73105b8 | 3056 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 3057 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 3058 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
3059 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
3060 | } else { | |
7ea7b4a1 AQ |
3061 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
3062 | * in the initial part | |
3063 | */ | |
3064 | tt_len = -1; | |
3065 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
3066 | &tvlv_tt_data, | |
3067 | &tt_change, | |
3068 | &tt_len); | |
3069 | if (!tt_len) | |
a73105b8 | 3070 | goto out; |
7ea7b4a1 AQ |
3071 | |
3072 | /* fill the rest of the tvlv with the real TT entries */ | |
3073 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
3074 | tt_change, tt_len, | |
3075 | batadv_tt_global_valid, | |
3076 | req_dst_orig_node); | |
a73105b8 AQ |
3077 | } |
3078 | ||
a19d3d85 ML |
3079 | /* Don't send the response, if larger than fragmented packet. */ |
3080 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
3081 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
3082 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
3083 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
3084 | res_dst_orig_node->orig); | |
3085 | goto out; | |
3086 | } | |
3087 | ||
335fbe0f ML |
3088 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
3089 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
3090 | |
3091 | if (full_table) | |
335fbe0f | 3092 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 3093 | |
39c75a51 | 3094 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
3095 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
3096 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
3097 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 3098 | |
d69909d2 | 3099 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 3100 | |
335fbe0f | 3101 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
3102 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
3103 | tvlv_len); | |
e91ecfc6 | 3104 | |
335fbe0f | 3105 | ret = true; |
a73105b8 AQ |
3106 | goto out; |
3107 | ||
3108 | unlock: | |
3109 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
3110 | ||
3111 | out: | |
79a0bffb SE |
3112 | batadv_orig_node_put(res_dst_orig_node); |
3113 | batadv_orig_node_put(req_dst_orig_node); | |
335fbe0f | 3114 | kfree(tvlv_tt_data); |
a73105b8 | 3115 | return ret; |
a73105b8 | 3116 | } |
96412690 | 3117 | |
335fbe0f | 3118 | /** |
7e9a8c2c SE |
3119 | * batadv_send_my_tt_response() - send reply to tt request concerning this |
3120 | * node's translation table | |
335fbe0f ML |
3121 | * @bat_priv: the bat priv with all the soft interface information |
3122 | * @tt_data: tt data containing the tt request information | |
3123 | * @req_src: mac address of tt request sender | |
3124 | * | |
62fe710f | 3125 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
3126 | */ |
3127 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
3128 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3129 | u8 *req_src) |
a73105b8 | 3130 | { |
335fbe0f | 3131 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 3132 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
3133 | struct batadv_tvlv_tt_change *tt_change; |
3134 | struct batadv_orig_node *orig_node; | |
6b5e971a SE |
3135 | u8 my_ttvn, req_ttvn; |
3136 | u16 tvlv_len; | |
a73105b8 | 3137 | bool full_table; |
6b5e971a | 3138 | s32 tt_len; |
a73105b8 | 3139 | |
39c75a51 | 3140 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3141 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f | 3142 | req_src, tt_data->ttvn, |
a2f2b6cd | 3143 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 3144 | |
a70a9aa9 | 3145 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 3146 | |
6b5e971a | 3147 | my_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 3148 | req_ttvn = tt_data->ttvn; |
a73105b8 | 3149 | |
335fbe0f | 3150 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
3151 | if (!orig_node) |
3152 | goto out; | |
3153 | ||
e5d89254 | 3154 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
3155 | if (!primary_if) |
3156 | goto out; | |
3157 | ||
3158 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
3159 | * is too big send the whole local translation table |
3160 | */ | |
335fbe0f | 3161 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 3162 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
3163 | full_table = true; |
3164 | else | |
3165 | full_table = false; | |
3166 | ||
335fbe0f ML |
3167 | /* TT fragmentation hasn't been implemented yet, so send as many |
3168 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 3169 | */ |
a73105b8 | 3170 | if (!full_table) { |
807736f6 | 3171 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 3172 | |
7ea7b4a1 AQ |
3173 | tt_len = bat_priv->tt.last_changeset_len; |
3174 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
3175 | &tvlv_tt_data, | |
3176 | &tt_change, | |
3177 | &tt_len); | |
c2d0f48a | 3178 | if (!tt_len || !tvlv_len) |
a73105b8 AQ |
3179 | goto unlock; |
3180 | ||
335fbe0f | 3181 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 3182 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
3183 | bat_priv->tt.last_changeset_len); |
3184 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 3185 | } else { |
6b5e971a | 3186 | req_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 3187 | |
7ea7b4a1 AQ |
3188 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
3189 | * in the initial part | |
3190 | */ | |
3191 | tt_len = -1; | |
3192 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
3193 | &tvlv_tt_data, | |
3194 | &tt_change, | |
3195 | &tt_len); | |
c2d0f48a | 3196 | if (!tt_len || !tvlv_len) |
a73105b8 | 3197 | goto out; |
7ea7b4a1 AQ |
3198 | |
3199 | /* fill the rest of the tvlv with the real TT entries */ | |
3200 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
3201 | tt_change, tt_len, | |
3202 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
3203 | } |
3204 | ||
335fbe0f ML |
3205 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
3206 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
3207 | |
3208 | if (full_table) | |
335fbe0f | 3209 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 3210 | |
39c75a51 | 3211 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
3212 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
3213 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 3214 | |
d69909d2 | 3215 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 3216 | |
335fbe0f | 3217 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
3218 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
3219 | tvlv_len); | |
335fbe0f | 3220 | |
a73105b8 AQ |
3221 | goto out; |
3222 | ||
3223 | unlock: | |
807736f6 | 3224 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 3225 | out: |
a70a9aa9 | 3226 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
79a0bffb SE |
3227 | batadv_orig_node_put(orig_node); |
3228 | batadv_hardif_put(primary_if); | |
335fbe0f ML |
3229 | kfree(tvlv_tt_data); |
3230 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
3231 | return true; |
3232 | } | |
3233 | ||
335fbe0f | 3234 | /** |
7e9a8c2c | 3235 | * batadv_send_tt_response() - send reply to tt request |
335fbe0f ML |
3236 | * @bat_priv: the bat priv with all the soft interface information |
3237 | * @tt_data: tt data containing the tt request information | |
3238 | * @req_src: mac address of tt request sender | |
3239 | * @req_dst: mac address of tt request recipient | |
3240 | * | |
62fe710f | 3241 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
3242 | */ |
3243 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
3244 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3245 | u8 *req_src, u8 *req_dst) |
a73105b8 | 3246 | { |
cfd4f757 | 3247 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 3248 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
24820df1 AQ |
3249 | return batadv_send_other_tt_response(bat_priv, tt_data, req_src, |
3250 | req_dst); | |
a73105b8 AQ |
3251 | } |
3252 | ||
56303d34 SE |
3253 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
3254 | struct batadv_orig_node *orig_node, | |
335fbe0f | 3255 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 3256 | u16 tt_num_changes, u8 ttvn) |
a73105b8 AQ |
3257 | { |
3258 | int i; | |
a513088d | 3259 | int roams; |
a73105b8 AQ |
3260 | |
3261 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
3262 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
3263 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
3264 | batadv_tt_global_del(bat_priv, orig_node, |
3265 | (tt_change + i)->addr, | |
c018ad3d | 3266 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
3267 | "tt removed by changes", |
3268 | roams); | |
08c36d3e | 3269 | } else { |
08c36d3e | 3270 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 3271 | (tt_change + i)->addr, |
c018ad3d | 3272 | ntohs((tt_change + i)->vid), |
d4f44692 | 3273 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
3274 | /* In case of problem while storing a |
3275 | * global_entry, we stop the updating | |
3276 | * procedure without committing the | |
3277 | * ttvn change. This will avoid to send | |
3278 | * corrupted data on tt_request | |
3279 | */ | |
3280 | return; | |
08c36d3e | 3281 | } |
a73105b8 | 3282 | } |
ac4eebd4 | 3283 | set_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
a73105b8 AQ |
3284 | } |
3285 | ||
56303d34 | 3286 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 | 3287 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a SE |
3288 | u8 ttvn, u8 *resp_src, |
3289 | u16 num_entries) | |
a73105b8 | 3290 | { |
170173bf | 3291 | struct batadv_orig_node *orig_node; |
a73105b8 | 3292 | |
335fbe0f | 3293 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
3294 | if (!orig_node) |
3295 | goto out; | |
3296 | ||
3297 | /* Purge the old table first.. */ | |
95fb130d AQ |
3298 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
3299 | "Received full table"); | |
a73105b8 | 3300 | |
7ea7b4a1 AQ |
3301 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
3302 | ttvn); | |
a73105b8 AQ |
3303 | |
3304 | spin_lock_bh(&orig_node->tt_buff_lock); | |
3305 | kfree(orig_node->tt_buff); | |
3306 | orig_node->tt_buff_len = 0; | |
3307 | orig_node->tt_buff = NULL; | |
3308 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
3309 | ||
7ea7b4a1 | 3310 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
3311 | |
3312 | out: | |
79a0bffb | 3313 | batadv_orig_node_put(orig_node); |
a73105b8 AQ |
3314 | } |
3315 | ||
56303d34 SE |
3316 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
3317 | struct batadv_orig_node *orig_node, | |
6b5e971a | 3318 | u16 tt_num_changes, u8 ttvn, |
335fbe0f | 3319 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 3320 | { |
a513088d SE |
3321 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
3322 | tt_num_changes, ttvn); | |
a73105b8 | 3323 | |
e8cf234a AQ |
3324 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
3325 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
3326 | atomic_set(&orig_node->last_ttvn, ttvn); |
3327 | } | |
3328 | ||
c018ad3d | 3329 | /** |
7e9a8c2c | 3330 | * batadv_is_my_client() - check if a client is served by the local node |
c018ad3d | 3331 | * @bat_priv: the bat priv with all the soft interface information |
3f68785e | 3332 | * @addr: the mac address of the client to check |
c018ad3d AQ |
3333 | * @vid: VLAN identifier |
3334 | * | |
62fe710f | 3335 | * Return: true if the client is served by this node, false otherwise. |
c018ad3d | 3336 | */ |
6b5e971a | 3337 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 3338 | unsigned short vid) |
a73105b8 | 3339 | { |
170173bf | 3340 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 3341 | bool ret = false; |
a73105b8 | 3342 | |
c018ad3d | 3343 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
3344 | if (!tt_local_entry) |
3345 | goto out; | |
058d0e26 | 3346 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
3347 | * consistency purpose) |
3348 | */ | |
7c1fd91d AQ |
3349 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
3350 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 3351 | goto out; |
7683fdc1 AQ |
3352 | ret = true; |
3353 | out: | |
79a0bffb | 3354 | batadv_tt_local_entry_put(tt_local_entry); |
7683fdc1 | 3355 | return ret; |
a73105b8 AQ |
3356 | } |
3357 | ||
335fbe0f | 3358 | /** |
7e9a8c2c | 3359 | * batadv_handle_tt_response() - process incoming tt reply |
335fbe0f ML |
3360 | * @bat_priv: the bat priv with all the soft interface information |
3361 | * @tt_data: tt data containing the tt request information | |
3362 | * @resp_src: mac address of tt reply sender | |
3363 | * @num_entries: number of tt change entries appended to the tt data | |
3364 | */ | |
3365 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
3366 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3367 | u8 *resp_src, u16 num_entries) |
a73105b8 | 3368 | { |
7c26a53b ML |
3369 | struct batadv_tt_req_node *node; |
3370 | struct hlist_node *safe; | |
56303d34 | 3371 | struct batadv_orig_node *orig_node = NULL; |
335fbe0f | 3372 | struct batadv_tvlv_tt_change *tt_change; |
6b5e971a SE |
3373 | u8 *tvlv_ptr = (u8 *)tt_data; |
3374 | u16 change_offset; | |
a73105b8 | 3375 | |
39c75a51 | 3376 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3377 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f | 3378 | resp_src, tt_data->ttvn, num_entries, |
a2f2b6cd | 3379 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 3380 | |
335fbe0f | 3381 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
3382 | if (!orig_node) |
3383 | goto out; | |
3384 | ||
a70a9aa9 AQ |
3385 | spin_lock_bh(&orig_node->tt_lock); |
3386 | ||
7ea7b4a1 AQ |
3387 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
3388 | change_offset *= ntohs(tt_data->num_vlan); | |
3389 | change_offset += sizeof(*tt_data); | |
3390 | tvlv_ptr += change_offset; | |
3391 | ||
3392 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 3393 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
3394 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
3395 | resp_src, num_entries); | |
96412690 | 3396 | } else { |
335fbe0f ML |
3397 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
3398 | tt_data->ttvn, tt_change); | |
96412690 | 3399 | } |
a73105b8 | 3400 | |
a70a9aa9 | 3401 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 3402 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
3403 | |
3404 | spin_unlock_bh(&orig_node->tt_lock); | |
3405 | ||
a73105b8 | 3406 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 | 3407 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 3408 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
335fbe0f | 3409 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 | 3410 | continue; |
7c26a53b | 3411 | hlist_del_init(&node->list); |
9c4604a2 | 3412 | batadv_tt_req_node_put(node); |
a73105b8 | 3413 | } |
7ea7b4a1 | 3414 | |
807736f6 | 3415 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 3416 | out: |
79a0bffb | 3417 | batadv_orig_node_put(orig_node); |
a73105b8 AQ |
3418 | } |
3419 | ||
56303d34 | 3420 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 3421 | { |
56303d34 | 3422 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 3423 | |
807736f6 | 3424 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 3425 | |
807736f6 | 3426 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e | 3427 | list_del(&node->list); |
86452f81 | 3428 | kmem_cache_free(batadv_tt_roam_cache, node); |
cc47f66e AQ |
3429 | } |
3430 | ||
807736f6 | 3431 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3432 | } |
3433 | ||
56303d34 | 3434 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 3435 | { |
56303d34 | 3436 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 3437 | |
807736f6 SE |
3438 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
3439 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
3440 | if (!batadv_has_timed_out(node->first_time, |
3441 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
3442 | continue; |
3443 | ||
3444 | list_del(&node->list); | |
86452f81 | 3445 | kmem_cache_free(batadv_tt_roam_cache, node); |
cc47f66e | 3446 | } |
807736f6 | 3447 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3448 | } |
3449 | ||
62fe710f | 3450 | /** |
7e9a8c2c | 3451 | * batadv_tt_check_roam_count() - check if a client has roamed too frequently |
d15cd622 AQ |
3452 | * @bat_priv: the bat priv with all the soft interface information |
3453 | * @client: mac address of the roaming client | |
62fe710f SE |
3454 | * |
3455 | * This function checks whether the client already reached the | |
cc47f66e AQ |
3456 | * maximum number of possible roaming phases. In this case the ROAMING_ADV |
3457 | * will not be sent. | |
3458 | * | |
62fe710f | 3459 | * Return: true if the ROAMING_ADV can be sent, false otherwise |
9cfc7bd6 | 3460 | */ |
6b5e971a | 3461 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, u8 *client) |
cc47f66e | 3462 | { |
56303d34 | 3463 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
3464 | bool ret = false; |
3465 | ||
807736f6 | 3466 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 3467 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
3468 | * reply from the same orig_node yet |
3469 | */ | |
807736f6 | 3470 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 3471 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
3472 | continue; |
3473 | ||
1eda58bf | 3474 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 3475 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
3476 | continue; |
3477 | ||
3e34819e | 3478 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
3479 | /* Sorry, you roamed too many times! */ |
3480 | goto unlock; | |
3481 | ret = true; | |
3482 | break; | |
3483 | } | |
3484 | ||
3485 | if (!ret) { | |
86452f81 SE |
3486 | tt_roam_node = kmem_cache_alloc(batadv_tt_roam_cache, |
3487 | GFP_ATOMIC); | |
cc47f66e AQ |
3488 | if (!tt_roam_node) |
3489 | goto unlock; | |
3490 | ||
3491 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
3492 | atomic_set(&tt_roam_node->counter, |
3493 | BATADV_ROAMING_MAX_COUNT - 1); | |
8fdd0153 | 3494 | ether_addr_copy(tt_roam_node->addr, client); |
cc47f66e | 3495 | |
807736f6 | 3496 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
3497 | ret = true; |
3498 | } | |
3499 | ||
3500 | unlock: | |
807736f6 | 3501 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3502 | return ret; |
3503 | } | |
3504 | ||
c018ad3d | 3505 | /** |
7e9a8c2c | 3506 | * batadv_send_roam_adv() - send a roaming advertisement message |
c018ad3d AQ |
3507 | * @bat_priv: the bat priv with all the soft interface information |
3508 | * @client: mac address of the roaming client | |
3509 | * @vid: VLAN identifier | |
3510 | * @orig_node: message destination | |
3511 | * | |
3512 | * Send a ROAMING_ADV message to the node which was previously serving this | |
3513 | * client. This is done to inform the node that from now on all traffic destined | |
3514 | * for this particular roamed client has to be forwarded to the sender of the | |
3515 | * roaming message. | |
3516 | */ | |
6b5e971a | 3517 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 3518 | unsigned short vid, |
56303d34 | 3519 | struct batadv_orig_node *orig_node) |
cc47f66e | 3520 | { |
56303d34 | 3521 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
3522 | struct batadv_tvlv_roam_adv tvlv_roam; |
3523 | ||
3524 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
3525 | if (!primary_if) | |
3526 | goto out; | |
cc47f66e AQ |
3527 | |
3528 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
3529 | * already roamed to us too many times |
3530 | */ | |
a513088d | 3531 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
3532 | goto out; |
3533 | ||
39c75a51 | 3534 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 3535 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
f7a2bd65 | 3536 | orig_node->orig, client, batadv_print_vid(vid)); |
cc47f66e | 3537 | |
d69909d2 | 3538 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 3539 | |
122edaa0 | 3540 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 3541 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
3542 | |
3543 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
3544 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
3545 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
3546 | |
3547 | out: | |
79a0bffb | 3548 | batadv_hardif_put(primary_if); |
a73105b8 AQ |
3549 | } |
3550 | ||
a513088d | 3551 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 3552 | { |
56303d34 | 3553 | struct delayed_work *delayed_work; |
807736f6 | 3554 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
3555 | struct batadv_priv *bat_priv; |
3556 | ||
4ba4bc0f | 3557 | delayed_work = to_delayed_work(work); |
807736f6 SE |
3558 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
3559 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 3560 | |
a19d3d85 | 3561 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 3562 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
3563 | batadv_tt_req_purge(bat_priv); |
3564 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 3565 | |
72414442 AQ |
3566 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
3567 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 3568 | } |
cc47f66e | 3569 | |
ff15c27c SE |
3570 | /** |
3571 | * batadv_tt_free() - Free translation table of soft interface | |
3572 | * @bat_priv: the bat priv with all the soft interface information | |
3573 | */ | |
56303d34 | 3574 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 3575 | { |
17f78dd1 JS |
3576 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_ROAM, 1); |
3577 | ||
e1bf0c14 ML |
3578 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
3579 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3580 | ||
807736f6 | 3581 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3582 | |
a513088d SE |
3583 | batadv_tt_local_table_free(bat_priv); |
3584 | batadv_tt_global_table_free(bat_priv); | |
3585 | batadv_tt_req_list_free(bat_priv); | |
3586 | batadv_tt_changes_list_free(bat_priv); | |
3587 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3588 | |
807736f6 | 3589 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3590 | } |
058d0e26 | 3591 | |
7ea7b4a1 | 3592 | /** |
7e9a8c2c | 3593 | * batadv_tt_local_set_flags() - set or unset the specified flags on the local |
7ea7b4a1 AQ |
3594 | * table and possibly count them in the TT size |
3595 | * @bat_priv: the bat priv with all the soft interface information | |
3596 | * @flags: the flag to switch | |
3597 | * @enable: whether to set or unset the flag | |
3598 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3599 | */ |
6b5e971a SE |
3600 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, u16 flags, |
3601 | bool enable, bool count) | |
058d0e26 | 3602 | { |
7ea7b4a1 AQ |
3603 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3604 | struct batadv_tt_common_entry *tt_common_entry; | |
058d0e26 | 3605 | struct hlist_head *head; |
6b5e971a | 3606 | u32 i; |
058d0e26 AQ |
3607 | |
3608 | if (!hash) | |
7ea7b4a1 | 3609 | return; |
058d0e26 AQ |
3610 | |
3611 | for (i = 0; i < hash->size; i++) { | |
3612 | head = &hash->table[i]; | |
3613 | ||
3614 | rcu_read_lock(); | |
b67bfe0d | 3615 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3616 | head, hash_entry) { |
697f2531 AQ |
3617 | if (enable) { |
3618 | if ((tt_common_entry->flags & flags) == flags) | |
3619 | continue; | |
3620 | tt_common_entry->flags |= flags; | |
3621 | } else { | |
3622 | if (!(tt_common_entry->flags & flags)) | |
3623 | continue; | |
3624 | tt_common_entry->flags &= ~flags; | |
3625 | } | |
7ea7b4a1 AQ |
3626 | |
3627 | if (!count) | |
3628 | continue; | |
3629 | ||
3630 | batadv_tt_local_size_inc(bat_priv, | |
3631 | tt_common_entry->vid); | |
058d0e26 AQ |
3632 | } |
3633 | rcu_read_unlock(); | |
3634 | } | |
058d0e26 AQ |
3635 | } |
3636 | ||
acd34afa | 3637 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3638 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3639 | { |
807736f6 | 3640 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3641 | struct batadv_tt_common_entry *tt_common; |
3642 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 3643 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3644 | struct hlist_head *head; |
3645 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
6b5e971a | 3646 | u32 i; |
058d0e26 AQ |
3647 | |
3648 | if (!hash) | |
3649 | return; | |
3650 | ||
3651 | for (i = 0; i < hash->size; i++) { | |
3652 | head = &hash->table[i]; | |
3653 | list_lock = &hash->list_locks[i]; | |
3654 | ||
3655 | spin_lock_bh(list_lock); | |
b67bfe0d | 3656 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3657 | hash_entry) { |
3658 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3659 | continue; |
3660 | ||
39c75a51 | 3661 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3662 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3663 | tt_common->addr, | |
f7a2bd65 | 3664 | batadv_print_vid(tt_common->vid)); |
058d0e26 | 3665 | |
7ea7b4a1 | 3666 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3667 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3668 | tt_local = container_of(tt_common, |
3669 | struct batadv_tt_local_entry, | |
3670 | common); | |
35df3b29 | 3671 | |
95c0db90 | 3672 | batadv_tt_local_entry_put(tt_local); |
058d0e26 AQ |
3673 | } |
3674 | spin_unlock_bh(list_lock); | |
3675 | } | |
058d0e26 AQ |
3676 | } |
3677 | ||
e1bf0c14 | 3678 | /** |
7e9a8c2c | 3679 | * batadv_tt_local_commit_changes_nolock() - commit all pending local tt changes |
a19d3d85 | 3680 | * which have been queued in the time since the last commit |
e1bf0c14 | 3681 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3682 | * |
3683 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3684 | */ |
a19d3d85 | 3685 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3686 | { |
5274cd68 SE |
3687 | lockdep_assert_held(&bat_priv->tt.commit_lock); |
3688 | ||
e1bf0c14 ML |
3689 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3690 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3691 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3692 | return; |
e1bf0c14 | 3693 | } |
be9aa4c1 | 3694 | |
7ea7b4a1 | 3695 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3696 | |
a513088d | 3697 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3698 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3699 | |
3700 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3701 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3702 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3703 | "Local changes committed, updating to ttvn %u\n", |
6b5e971a | 3704 | (u8)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3705 | |
3706 | /* reset the sending counter */ | |
807736f6 | 3707 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3708 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3709 | } |
a70a9aa9 | 3710 | |
a19d3d85 | 3711 | /** |
7e9a8c2c | 3712 | * batadv_tt_local_commit_changes() - commit all pending local tt changes which |
a19d3d85 ML |
3713 | * have been queued in the time since the last commit |
3714 | * @bat_priv: the bat priv with all the soft interface information | |
3715 | */ | |
3716 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3717 | { | |
3718 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3719 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3720 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3721 | } |
59b699cd | 3722 | |
ff15c27c SE |
3723 | /** |
3724 | * batadv_is_ap_isolated() - Check if packet from upper layer should be dropped | |
3725 | * @bat_priv: the bat priv with all the soft interface information | |
3726 | * @src: source mac address of packet | |
3727 | * @dst: destination mac address of packet | |
3728 | * @vid: vlan id of packet | |
3729 | * | |
3730 | * Return: true when src+dst(+vid) pair should be isolated, false otherwise | |
3731 | */ | |
6b5e971a SE |
3732 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst, |
3733 | unsigned short vid) | |
59b699cd | 3734 | { |
393b299d ME |
3735 | struct batadv_tt_local_entry *tt_local_entry; |
3736 | struct batadv_tt_global_entry *tt_global_entry; | |
b8cbd81d | 3737 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3738 | bool ret = false; |
59b699cd | 3739 | |
b8cbd81d | 3740 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
e087f34f ME |
3741 | if (!vlan) |
3742 | return false; | |
3743 | ||
3744 | if (!atomic_read(&vlan->ap_isolation)) | |
393b299d | 3745 | goto vlan_put; |
59b699cd | 3746 | |
b8cbd81d | 3747 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd | 3748 | if (!tt_local_entry) |
393b299d | 3749 | goto vlan_put; |
59b699cd | 3750 | |
b8cbd81d | 3751 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd | 3752 | if (!tt_global_entry) |
393b299d | 3753 | goto local_entry_put; |
59b699cd | 3754 | |
393b299d ME |
3755 | if (_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
3756 | ret = true; | |
59b699cd | 3757 | |
393b299d ME |
3758 | batadv_tt_global_entry_put(tt_global_entry); |
3759 | local_entry_put: | |
3760 | batadv_tt_local_entry_put(tt_local_entry); | |
3761 | vlan_put: | |
9c3bf081 | 3762 | batadv_softif_vlan_put(vlan); |
59b699cd AQ |
3763 | return ret; |
3764 | } | |
a943cac1 | 3765 | |
e1bf0c14 | 3766 | /** |
7e9a8c2c | 3767 | * batadv_tt_update_orig() - update global translation table with new tt |
e1bf0c14 ML |
3768 | * information received via ogms |
3769 | * @bat_priv: the bat priv with all the soft interface information | |
e51f0397 SE |
3770 | * @orig_node: the orig_node of the ogm |
3771 | * @tt_buff: pointer to the first tvlv VLAN entry | |
7ea7b4a1 AQ |
3772 | * @tt_num_vlan: number of tvlv VLAN entries |
3773 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3774 | * @tt_num_changes: number of tt changes inside the tt buffer |
3775 | * @ttvn: translation table version number of this changeset | |
e1bf0c14 ML |
3776 | */ |
3777 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3778 | struct batadv_orig_node *orig_node, | |
6b5e971a | 3779 | const void *tt_buff, u16 tt_num_vlan, |
7ea7b4a1 | 3780 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 3781 | u16 tt_num_changes, u8 ttvn) |
a943cac1 | 3782 | { |
6b5e971a | 3783 | u8 orig_ttvn = (u8)atomic_read(&orig_node->last_ttvn); |
7ea7b4a1 | 3784 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 | 3785 | bool full_table = true; |
e17931d1 | 3786 | bool has_tt_init; |
a943cac1 | 3787 | |
7ea7b4a1 | 3788 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
ac4eebd4 LL |
3789 | has_tt_init = test_bit(BATADV_ORIG_CAPA_HAS_TT, |
3790 | &orig_node->capa_initialized); | |
e17931d1 | 3791 | |
17071578 | 3792 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3793 | * increased by one -> we can apply the attached changes |
3794 | */ | |
e17931d1 | 3795 | if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) { |
a943cac1 | 3796 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3797 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3798 | * times. | |
9cfc7bd6 SE |
3799 | * In this case send a tt request |
3800 | */ | |
a943cac1 ML |
3801 | if (!tt_num_changes) { |
3802 | full_table = false; | |
3803 | goto request_table; | |
3804 | } | |
3805 | ||
a70a9aa9 AQ |
3806 | spin_lock_bh(&orig_node->tt_lock); |
3807 | ||
a513088d | 3808 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3809 | ttvn, tt_change); |
a943cac1 ML |
3810 | |
3811 | /* Even if we received the precomputed crc with the OGM, we | |
3812 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3813 | * in the global table |
3814 | */ | |
7ea7b4a1 | 3815 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3816 | |
a70a9aa9 AQ |
3817 | spin_unlock_bh(&orig_node->tt_lock); |
3818 | ||
a943cac1 ML |
3819 | /* The ttvn alone is not enough to guarantee consistency |
3820 | * because a single value could represent different states | |
3821 | * (due to the wrap around). Thus a node has to check whether | |
3822 | * the resulting table (after applying the changes) is still | |
3823 | * consistent or not. E.g. a node could disconnect while its | |
3824 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3825 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3826 | * inconsistency |
3827 | */ | |
7ea7b4a1 AQ |
3828 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3829 | tt_num_vlan)) | |
a943cac1 | 3830 | goto request_table; |
a943cac1 ML |
3831 | } else { |
3832 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3833 | * in sync anymore -> request fresh tt data |
3834 | */ | |
e17931d1 | 3835 | if (!has_tt_init || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3836 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3837 | tt_num_vlan)) { | |
a943cac1 | 3838 | request_table: |
39c75a51 | 3839 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3840 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3841 | orig_node->orig, ttvn, orig_ttvn, | |
3842 | tt_num_changes); | |
a513088d | 3843 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3844 | tt_vlan, tt_num_vlan, |
3845 | full_table); | |
a943cac1 ML |
3846 | return; |
3847 | } | |
3848 | } | |
3849 | } | |
3275e7cc | 3850 | |
c018ad3d | 3851 | /** |
7e9a8c2c | 3852 | * batadv_tt_global_client_is_roaming() - check if a client is marked as roaming |
c018ad3d AQ |
3853 | * @bat_priv: the bat priv with all the soft interface information |
3854 | * @addr: the mac address of the client to check | |
3855 | * @vid: VLAN identifier | |
3856 | * | |
62fe710f | 3857 | * Return: true if we know that the client has moved from its old originator |
c018ad3d AQ |
3858 | * to another one. This entry is still kept for consistency purposes and will be |
3859 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3860 | */ |
56303d34 | 3861 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
6b5e971a | 3862 | u8 *addr, unsigned short vid) |
3275e7cc | 3863 | { |
56303d34 | 3864 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3865 | bool ret = false; |
3866 | ||
c018ad3d | 3867 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3868 | if (!tt_global_entry) |
3869 | goto out; | |
3870 | ||
c1d07431 | 3871 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
5dafd8a6 | 3872 | batadv_tt_global_entry_put(tt_global_entry); |
3275e7cc AQ |
3873 | out: |
3874 | return ret; | |
3875 | } | |
30cfd02b | 3876 | |
7c1fd91d | 3877 | /** |
7e9a8c2c | 3878 | * batadv_tt_local_client_is_roaming() - tells whether the client is roaming |
7c1fd91d | 3879 | * @bat_priv: the bat priv with all the soft interface information |
c018ad3d AQ |
3880 | * @addr: the mac address of the local client to query |
3881 | * @vid: VLAN identifier | |
7c1fd91d | 3882 | * |
62fe710f | 3883 | * Return: true if the local client is known to be roaming (it is not served by |
7c1fd91d AQ |
3884 | * this node anymore) or not. If yes, the client is still present in the table |
3885 | * to keep the latter consistent with the node TTVN | |
3886 | */ | |
3887 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
6b5e971a | 3888 | u8 *addr, unsigned short vid) |
7c1fd91d AQ |
3889 | { |
3890 | struct batadv_tt_local_entry *tt_local_entry; | |
3891 | bool ret = false; | |
3892 | ||
c018ad3d | 3893 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3894 | if (!tt_local_entry) |
3895 | goto out; | |
3896 | ||
3897 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
95c0db90 | 3898 | batadv_tt_local_entry_put(tt_local_entry); |
7c1fd91d AQ |
3899 | out: |
3900 | return ret; | |
7c1fd91d AQ |
3901 | } |
3902 | ||
ff15c27c SE |
3903 | /** |
3904 | * batadv_tt_add_temporary_global_entry() - Add temporary entry to global TT | |
3905 | * @bat_priv: the bat priv with all the soft interface information | |
3906 | * @orig_node: orig node which the temporary entry should be associated with | |
3907 | * @addr: mac address of the client | |
3908 | * @vid: VLAN id of the new temporary global translation table | |
3909 | * | |
3910 | * Return: true when temporary tt entry could be added, false otherwise | |
3911 | */ | |
30cfd02b AQ |
3912 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
3913 | struct batadv_orig_node *orig_node, | |
c018ad3d | 3914 | const unsigned char *addr, |
16052789 | 3915 | unsigned short vid) |
30cfd02b | 3916 | { |
1227c9ae SW |
3917 | /* ignore loop detect macs, they are not supposed to be in the tt local |
3918 | * data as well. | |
3919 | */ | |
3920 | if (batadv_bla_is_loopdetect_mac(addr)) | |
3921 | return false; | |
3922 | ||
16052789 | 3923 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
3924 | BATADV_TT_CLIENT_TEMP, |
3925 | atomic_read(&orig_node->last_ttvn))) | |
75ae84a4 | 3926 | return false; |
30cfd02b AQ |
3927 | |
3928 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 | 3929 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
f7a2bd65 | 3930 | addr, batadv_print_vid(vid), orig_node->orig); |
75ae84a4 SW |
3931 | |
3932 | return true; | |
30cfd02b | 3933 | } |
e1bf0c14 | 3934 | |
a19d3d85 | 3935 | /** |
7e9a8c2c | 3936 | * batadv_tt_local_resize_to_mtu() - resize the local translation table fit the |
a19d3d85 ML |
3937 | * maximum packet size that can be transported through the mesh |
3938 | * @soft_iface: netdev struct of the mesh interface | |
3939 | * | |
3940 | * Remove entries older than 'timeout' and half timeout if more entries need | |
3941 | * to be removed. | |
3942 | */ | |
3943 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
3944 | { | |
3945 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
3946 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
3947 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
3948 | bool reduced = false; | |
3949 | ||
3950 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3951 | ||
3952 | while (true) { | |
3953 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
3954 | if (packet_size_max >= table_size) | |
3955 | break; | |
3956 | ||
3957 | batadv_tt_local_purge(bat_priv, timeout); | |
3958 | batadv_tt_local_purge_pending_clients(bat_priv); | |
3959 | ||
3960 | timeout /= 2; | |
3961 | reduced = true; | |
3962 | net_ratelimited_function(batadv_info, soft_iface, | |
3963 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
3964 | packet_size_max); | |
3965 | } | |
3966 | ||
3967 | /* commit these changes immediately, to avoid synchronization problem | |
3968 | * with the TTVN | |
3969 | */ | |
3970 | if (reduced) | |
3971 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
3972 | ||
3973 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
3974 | } | |
3975 | ||
e1bf0c14 | 3976 | /** |
7e9a8c2c | 3977 | * batadv_tt_tvlv_ogm_handler_v1() - process incoming tt tvlv container |
e1bf0c14 ML |
3978 | * @bat_priv: the bat priv with all the soft interface information |
3979 | * @orig: the orig_node of the ogm | |
3980 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
3981 | * @tvlv_value: tvlv buffer containing the gateway data | |
3982 | * @tvlv_value_len: tvlv buffer length | |
3983 | */ | |
3984 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
3985 | struct batadv_orig_node *orig, | |
6b5e971a SE |
3986 | u8 flags, void *tvlv_value, |
3987 | u16 tvlv_value_len) | |
e1bf0c14 | 3988 | { |
7ea7b4a1 AQ |
3989 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
3990 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 3991 | struct batadv_tvlv_tt_data *tt_data; |
6b5e971a | 3992 | u16 num_entries, num_vlan; |
e1bf0c14 ML |
3993 | |
3994 | if (tvlv_value_len < sizeof(*tt_data)) | |
3995 | return; | |
3996 | ||
3997 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3998 | tvlv_value_len -= sizeof(*tt_data); | |
3999 | ||
7ea7b4a1 AQ |
4000 | num_vlan = ntohs(tt_data->num_vlan); |
4001 | ||
4002 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
4003 | return; | |
4004 | ||
4005 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
4006 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
4007 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
4008 | ||
298e6e68 | 4009 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 4010 | |
7ea7b4a1 AQ |
4011 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
4012 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
4013 | } |
4014 | ||
335fbe0f | 4015 | /** |
7e9a8c2c | 4016 | * batadv_tt_tvlv_unicast_handler_v1() - process incoming (unicast) tt tvlv |
335fbe0f ML |
4017 | * container |
4018 | * @bat_priv: the bat priv with all the soft interface information | |
4019 | * @src: mac address of tt tvlv sender | |
4020 | * @dst: mac address of tt tvlv recipient | |
4021 | * @tvlv_value: tvlv buffer containing the tt data | |
4022 | * @tvlv_value_len: tvlv buffer length | |
4023 | * | |
62fe710f | 4024 | * Return: NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS |
335fbe0f ML |
4025 | * otherwise. |
4026 | */ | |
4027 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 4028 | u8 *src, u8 *dst, |
335fbe0f | 4029 | void *tvlv_value, |
6b5e971a | 4030 | u16 tvlv_value_len) |
335fbe0f ML |
4031 | { |
4032 | struct batadv_tvlv_tt_data *tt_data; | |
6b5e971a | 4033 | u16 tt_vlan_len, tt_num_entries; |
335fbe0f ML |
4034 | char tt_flag; |
4035 | bool ret; | |
4036 | ||
4037 | if (tvlv_value_len < sizeof(*tt_data)) | |
4038 | return NET_RX_SUCCESS; | |
4039 | ||
4040 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
4041 | tvlv_value_len -= sizeof(*tt_data); | |
4042 | ||
7ea7b4a1 AQ |
4043 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
4044 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
4045 | ||
4046 | if (tvlv_value_len < tt_vlan_len) | |
4047 | return NET_RX_SUCCESS; | |
4048 | ||
4049 | tvlv_value_len -= tt_vlan_len; | |
4050 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
4051 | |
4052 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
4053 | case BATADV_TT_REQUEST: | |
4054 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
4055 | ||
4056 | /* If this node cannot provide a TT response the tt_request is | |
4057 | * forwarded | |
4058 | */ | |
4059 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
4060 | if (!ret) { | |
4061 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
4062 | tt_flag = 'F'; | |
4063 | else | |
4064 | tt_flag = '.'; | |
4065 | ||
4066 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
4067 | "Routing TT_REQUEST to %pM [%c]\n", | |
4068 | dst, tt_flag); | |
4069 | /* tvlv API will re-route the packet */ | |
4070 | return NET_RX_DROP; | |
4071 | } | |
4072 | break; | |
4073 | case BATADV_TT_RESPONSE: | |
4074 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
4075 | ||
4076 | if (batadv_is_my_mac(bat_priv, dst)) { | |
4077 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 4078 | src, tt_num_entries); |
335fbe0f ML |
4079 | return NET_RX_SUCCESS; |
4080 | } | |
4081 | ||
4082 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
4083 | tt_flag = 'F'; | |
4084 | else | |
4085 | tt_flag = '.'; | |
4086 | ||
4087 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
4088 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
4089 | ||
4090 | /* tvlv API will re-route the packet */ | |
4091 | return NET_RX_DROP; | |
4092 | } | |
4093 | ||
4094 | return NET_RX_SUCCESS; | |
4095 | } | |
4096 | ||
122edaa0 | 4097 | /** |
7e9a8c2c SE |
4098 | * batadv_roam_tvlv_unicast_handler_v1() - process incoming tt roam tvlv |
4099 | * container | |
122edaa0 ML |
4100 | * @bat_priv: the bat priv with all the soft interface information |
4101 | * @src: mac address of tt tvlv sender | |
4102 | * @dst: mac address of tt tvlv recipient | |
4103 | * @tvlv_value: tvlv buffer containing the tt data | |
4104 | * @tvlv_value_len: tvlv buffer length | |
4105 | * | |
62fe710f | 4106 | * Return: NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS |
122edaa0 ML |
4107 | * otherwise. |
4108 | */ | |
4109 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 4110 | u8 *src, u8 *dst, |
122edaa0 | 4111 | void *tvlv_value, |
6b5e971a | 4112 | u16 tvlv_value_len) |
122edaa0 ML |
4113 | { |
4114 | struct batadv_tvlv_roam_adv *roaming_adv; | |
4115 | struct batadv_orig_node *orig_node = NULL; | |
4116 | ||
4117 | /* If this node is not the intended recipient of the | |
4118 | * roaming advertisement the packet is forwarded | |
4119 | * (the tvlv API will re-route the packet). | |
4120 | */ | |
4121 | if (!batadv_is_my_mac(bat_priv, dst)) | |
4122 | return NET_RX_DROP; | |
4123 | ||
122edaa0 ML |
4124 | if (tvlv_value_len < sizeof(*roaming_adv)) |
4125 | goto out; | |
4126 | ||
4127 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
4128 | if (!orig_node) | |
4129 | goto out; | |
4130 | ||
4131 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
4132 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
4133 | ||
4134 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
4135 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
4136 | src, roaming_adv->client); | |
4137 | ||
4138 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 4139 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
4140 | atomic_read(&orig_node->last_ttvn) + 1); |
4141 | ||
4142 | out: | |
79a0bffb | 4143 | batadv_orig_node_put(orig_node); |
122edaa0 ML |
4144 | return NET_RX_SUCCESS; |
4145 | } | |
4146 | ||
e1bf0c14 | 4147 | /** |
7e9a8c2c | 4148 | * batadv_tt_init() - initialise the translation table internals |
e1bf0c14 ML |
4149 | * @bat_priv: the bat priv with all the soft interface information |
4150 | * | |
62fe710f | 4151 | * Return: 0 on success or negative error number in case of failure. |
e1bf0c14 ML |
4152 | */ |
4153 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
4154 | { | |
4155 | int ret; | |
4156 | ||
0eb01568 AQ |
4157 | /* synchronized flags must be remote */ |
4158 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
4159 | ||
e1bf0c14 ML |
4160 | ret = batadv_tt_local_init(bat_priv); |
4161 | if (ret < 0) | |
4162 | return ret; | |
4163 | ||
4164 | ret = batadv_tt_global_init(bat_priv); | |
6f68cd63 PS |
4165 | if (ret < 0) { |
4166 | batadv_tt_local_table_free(bat_priv); | |
e1bf0c14 | 4167 | return ret; |
6f68cd63 | 4168 | } |
e1bf0c14 ML |
4169 | |
4170 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
4171 | batadv_tt_tvlv_unicast_handler_v1, |
4172 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 4173 | |
122edaa0 ML |
4174 | batadv_tvlv_handler_register(bat_priv, NULL, |
4175 | batadv_roam_tvlv_unicast_handler_v1, | |
4176 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
4177 | ||
e1bf0c14 ML |
4178 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
4179 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
4180 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
4181 | ||
4182 | return 1; | |
4183 | } | |
42cb0bef AQ |
4184 | |
4185 | /** | |
7e9a8c2c | 4186 | * batadv_tt_global_is_isolated() - check if a client is marked as isolated |
42cb0bef AQ |
4187 | * @bat_priv: the bat priv with all the soft interface information |
4188 | * @addr: the mac address of the client | |
4189 | * @vid: the identifier of the VLAN where this client is connected | |
4190 | * | |
62fe710f | 4191 | * Return: true if the client is marked with the TT_CLIENT_ISOLA flag, false |
42cb0bef AQ |
4192 | * otherwise |
4193 | */ | |
4194 | bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, | |
6b5e971a | 4195 | const u8 *addr, unsigned short vid) |
42cb0bef AQ |
4196 | { |
4197 | struct batadv_tt_global_entry *tt; | |
4198 | bool ret; | |
4199 | ||
4200 | tt = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
4201 | if (!tt) | |
4202 | return false; | |
4203 | ||
4204 | ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; | |
4205 | ||
5dafd8a6 | 4206 | batadv_tt_global_entry_put(tt); |
42cb0bef AQ |
4207 | |
4208 | return ret; | |
4209 | } | |
86452f81 SE |
4210 | |
4211 | /** | |
7e9a8c2c | 4212 | * batadv_tt_cache_init() - Initialize tt memory object cache |
86452f81 SE |
4213 | * |
4214 | * Return: 0 on success or negative error number in case of failure. | |
4215 | */ | |
4216 | int __init batadv_tt_cache_init(void) | |
4217 | { | |
4218 | size_t tl_size = sizeof(struct batadv_tt_local_entry); | |
4219 | size_t tg_size = sizeof(struct batadv_tt_global_entry); | |
4220 | size_t tt_orig_size = sizeof(struct batadv_tt_orig_list_entry); | |
4221 | size_t tt_change_size = sizeof(struct batadv_tt_change_node); | |
4222 | size_t tt_req_size = sizeof(struct batadv_tt_req_node); | |
4223 | size_t tt_roam_size = sizeof(struct batadv_tt_roam_node); | |
4224 | ||
4225 | batadv_tl_cache = kmem_cache_create("batadv_tl_cache", tl_size, 0, | |
4226 | SLAB_HWCACHE_ALIGN, NULL); | |
4227 | if (!batadv_tl_cache) | |
4228 | return -ENOMEM; | |
4229 | ||
4230 | batadv_tg_cache = kmem_cache_create("batadv_tg_cache", tg_size, 0, | |
4231 | SLAB_HWCACHE_ALIGN, NULL); | |
4232 | if (!batadv_tg_cache) | |
4233 | goto err_tt_tl_destroy; | |
4234 | ||
4235 | batadv_tt_orig_cache = kmem_cache_create("batadv_tt_orig_cache", | |
4236 | tt_orig_size, 0, | |
4237 | SLAB_HWCACHE_ALIGN, NULL); | |
4238 | if (!batadv_tt_orig_cache) | |
4239 | goto err_tt_tg_destroy; | |
4240 | ||
4241 | batadv_tt_change_cache = kmem_cache_create("batadv_tt_change_cache", | |
4242 | tt_change_size, 0, | |
4243 | SLAB_HWCACHE_ALIGN, NULL); | |
4244 | if (!batadv_tt_change_cache) | |
4245 | goto err_tt_orig_destroy; | |
4246 | ||
4247 | batadv_tt_req_cache = kmem_cache_create("batadv_tt_req_cache", | |
4248 | tt_req_size, 0, | |
4249 | SLAB_HWCACHE_ALIGN, NULL); | |
4250 | if (!batadv_tt_req_cache) | |
4251 | goto err_tt_change_destroy; | |
4252 | ||
4253 | batadv_tt_roam_cache = kmem_cache_create("batadv_tt_roam_cache", | |
4254 | tt_roam_size, 0, | |
4255 | SLAB_HWCACHE_ALIGN, NULL); | |
4256 | if (!batadv_tt_roam_cache) | |
4257 | goto err_tt_req_destroy; | |
4258 | ||
4259 | return 0; | |
4260 | ||
4261 | err_tt_req_destroy: | |
4262 | kmem_cache_destroy(batadv_tt_req_cache); | |
4263 | batadv_tt_req_cache = NULL; | |
4264 | err_tt_change_destroy: | |
4265 | kmem_cache_destroy(batadv_tt_change_cache); | |
4266 | batadv_tt_change_cache = NULL; | |
4267 | err_tt_orig_destroy: | |
4268 | kmem_cache_destroy(batadv_tt_orig_cache); | |
4269 | batadv_tt_orig_cache = NULL; | |
4270 | err_tt_tg_destroy: | |
4271 | kmem_cache_destroy(batadv_tg_cache); | |
4272 | batadv_tg_cache = NULL; | |
4273 | err_tt_tl_destroy: | |
4274 | kmem_cache_destroy(batadv_tl_cache); | |
4275 | batadv_tl_cache = NULL; | |
4276 | ||
4277 | return -ENOMEM; | |
4278 | } | |
4279 | ||
4280 | /** | |
7e9a8c2c | 4281 | * batadv_tt_cache_destroy() - Destroy tt memory object cache |
86452f81 SE |
4282 | */ |
4283 | void batadv_tt_cache_destroy(void) | |
4284 | { | |
4285 | kmem_cache_destroy(batadv_tl_cache); | |
4286 | kmem_cache_destroy(batadv_tg_cache); | |
4287 | kmem_cache_destroy(batadv_tt_orig_cache); | |
4288 | kmem_cache_destroy(batadv_tt_change_cache); | |
4289 | kmem_cache_destroy(batadv_tt_req_cache); | |
4290 | kmem_cache_destroy(batadv_tt_roam_cache); | |
4291 | } |