Commit | Line | Data |
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0046b040 | 1 | /* Copyright (C) 2007-2016 B.A.T.M.A.N. contributors: |
fc957275 ML |
2 | * |
3 | * Marek Lindner, Simon Wunderlich | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
ebf38fb7 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
fc957275 ML |
16 | */ |
17 | ||
a2d08166 | 18 | #include "bat_iv_ogm.h" |
fc957275 | 19 | #include "main.h" |
1e2c2a4f SE |
20 | |
21 | #include <linux/atomic.h> | |
22 | #include <linux/bitmap.h> | |
23 | #include <linux/bitops.h> | |
24 | #include <linux/bug.h> | |
25 | #include <linux/byteorder/generic.h> | |
26 | #include <linux/cache.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/etherdevice.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/if_ether.h> | |
31 | #include <linux/init.h> | |
32 | #include <linux/jiffies.h> | |
f0d97253 | 33 | #include <linux/kernel.h> |
77ae32e8 | 34 | #include <linux/kref.h> |
fcafa5e7 | 35 | #include <linux/list.h> |
64ae7445 | 36 | #include <linux/lockdep.h> |
1e2c2a4f SE |
37 | #include <linux/netdevice.h> |
38 | #include <linux/pkt_sched.h> | |
39 | #include <linux/printk.h> | |
40 | #include <linux/random.h> | |
41 | #include <linux/rculist.h> | |
42 | #include <linux/rcupdate.h> | |
43 | #include <linux/seq_file.h> | |
44 | #include <linux/skbuff.h> | |
45 | #include <linux/slab.h> | |
46 | #include <linux/spinlock.h> | |
47 | #include <linux/stddef.h> | |
48 | #include <linux/string.h> | |
49 | #include <linux/types.h> | |
50 | #include <linux/workqueue.h> | |
51 | ||
a2d08166 | 52 | #include "bat_algo.h" |
1e2c2a4f | 53 | #include "bitarray.h" |
34d99cfe | 54 | #include "gateway_client.h" |
1e2c2a4f SE |
55 | #include "hard-interface.h" |
56 | #include "hash.h" | |
ba412080 | 57 | #include "log.h" |
1e2c2a4f | 58 | #include "network-coding.h" |
fc957275 | 59 | #include "originator.h" |
1e2c2a4f | 60 | #include "packet.h" |
fc957275 | 61 | #include "routing.h" |
fc957275 | 62 | #include "send.h" |
1e2c2a4f | 63 | #include "translation-table.h" |
1f8dce49 | 64 | #include "tvlv.h" |
fc957275 | 65 | |
f0d97253 AQ |
66 | static void batadv_iv_send_outstanding_bat_ogm_packet(struct work_struct *work); |
67 | ||
791c2a2d | 68 | /** |
95298a91 | 69 | * enum batadv_dup_status - duplicate status |
9f52ee19 | 70 | * @BATADV_NO_DUP: the packet is no duplicate |
791c2a2d AQ |
71 | * @BATADV_ORIG_DUP: OGM is a duplicate in the originator (but not for the |
72 | * neighbor) | |
73 | * @BATADV_NEIGH_DUP: OGM is a duplicate for the neighbor | |
74 | * @BATADV_PROTECTED: originator is currently protected (after reboot) | |
75 | */ | |
76 | enum batadv_dup_status { | |
77 | BATADV_NO_DUP = 0, | |
78 | BATADV_ORIG_DUP, | |
79 | BATADV_NEIGH_DUP, | |
80 | BATADV_PROTECTED, | |
81 | }; | |
82 | ||
24a5deeb AQ |
83 | /** |
84 | * batadv_ring_buffer_set - update the ring buffer with the given value | |
85 | * @lq_recv: pointer to the ring buffer | |
86 | * @lq_index: index to store the value at | |
87 | * @value: value to store in the ring buffer | |
88 | */ | |
6b5e971a | 89 | static void batadv_ring_buffer_set(u8 lq_recv[], u8 *lq_index, u8 value) |
24a5deeb AQ |
90 | { |
91 | lq_recv[*lq_index] = value; | |
92 | *lq_index = (*lq_index + 1) % BATADV_TQ_GLOBAL_WINDOW_SIZE; | |
93 | } | |
94 | ||
95 | /** | |
d491dbb6 | 96 | * batadv_ring_buffer_avg - compute the average of all non-zero values stored |
24a5deeb AQ |
97 | * in the given ring buffer |
98 | * @lq_recv: pointer to the ring buffer | |
99 | * | |
62fe710f | 100 | * Return: computed average value. |
24a5deeb | 101 | */ |
6b5e971a | 102 | static u8 batadv_ring_buffer_avg(const u8 lq_recv[]) |
24a5deeb | 103 | { |
6b5e971a SE |
104 | const u8 *ptr; |
105 | u16 count = 0; | |
106 | u16 i = 0; | |
107 | u16 sum = 0; | |
24a5deeb AQ |
108 | |
109 | ptr = lq_recv; | |
110 | ||
111 | while (i < BATADV_TQ_GLOBAL_WINDOW_SIZE) { | |
112 | if (*ptr != 0) { | |
113 | count++; | |
114 | sum += *ptr; | |
115 | } | |
116 | ||
117 | i++; | |
118 | ptr++; | |
119 | } | |
120 | ||
121 | if (count == 0) | |
122 | return 0; | |
123 | ||
6b5e971a | 124 | return (u8)(sum / count); |
24a5deeb | 125 | } |
d98cae64 | 126 | |
d0015fdd AQ |
127 | /** |
128 | * batadv_iv_ogm_orig_free - free the private resources allocated for this | |
129 | * orig_node | |
130 | * @orig_node: the orig_node for which the resources have to be free'd | |
131 | */ | |
132 | static void batadv_iv_ogm_orig_free(struct batadv_orig_node *orig_node) | |
133 | { | |
134 | kfree(orig_node->bat_iv.bcast_own); | |
135 | kfree(orig_node->bat_iv.bcast_own_sum); | |
136 | } | |
137 | ||
138 | /** | |
139 | * batadv_iv_ogm_orig_add_if - change the private structures of the orig_node to | |
140 | * include the new hard-interface | |
141 | * @orig_node: the orig_node that has to be changed | |
142 | * @max_if_num: the current amount of interfaces | |
143 | * | |
62fe710f | 144 | * Return: 0 on success, a negative error code otherwise. |
d0015fdd AQ |
145 | */ |
146 | static int batadv_iv_ogm_orig_add_if(struct batadv_orig_node *orig_node, | |
147 | int max_if_num) | |
148 | { | |
149 | void *data_ptr; | |
0185dda6 | 150 | size_t old_size; |
d0015fdd AQ |
151 | int ret = -ENOMEM; |
152 | ||
153 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
154 | ||
d0015fdd | 155 | old_size = (max_if_num - 1) * sizeof(unsigned long) * BATADV_NUM_WORDS; |
0185dda6 AQ |
156 | data_ptr = kmalloc_array(max_if_num, |
157 | BATADV_NUM_WORDS * sizeof(unsigned long), | |
158 | GFP_ATOMIC); | |
d0015fdd AQ |
159 | if (!data_ptr) |
160 | goto unlock; | |
161 | ||
162 | memcpy(data_ptr, orig_node->bat_iv.bcast_own, old_size); | |
163 | kfree(orig_node->bat_iv.bcast_own); | |
164 | orig_node->bat_iv.bcast_own = data_ptr; | |
165 | ||
6b5e971a | 166 | data_ptr = kmalloc_array(max_if_num, sizeof(u8), GFP_ATOMIC); |
f7dcdf5f | 167 | if (!data_ptr) |
d0015fdd | 168 | goto unlock; |
d0015fdd AQ |
169 | |
170 | memcpy(data_ptr, orig_node->bat_iv.bcast_own_sum, | |
6b5e971a | 171 | (max_if_num - 1) * sizeof(u8)); |
d0015fdd AQ |
172 | kfree(orig_node->bat_iv.bcast_own_sum); |
173 | orig_node->bat_iv.bcast_own_sum = data_ptr; | |
174 | ||
175 | ret = 0; | |
176 | ||
177 | unlock: | |
178 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
179 | ||
180 | return ret; | |
181 | } | |
182 | ||
183 | /** | |
64ae7445 | 184 | * batadv_iv_ogm_drop_bcast_own_entry - drop section of bcast_own |
d0015fdd AQ |
185 | * @orig_node: the orig_node that has to be changed |
186 | * @max_if_num: the current amount of interfaces | |
187 | * @del_if_num: the index of the interface being removed | |
d0015fdd | 188 | */ |
64ae7445 SE |
189 | static void |
190 | batadv_iv_ogm_drop_bcast_own_entry(struct batadv_orig_node *orig_node, | |
191 | int max_if_num, int del_if_num) | |
d0015fdd | 192 | { |
64ae7445 SE |
193 | size_t chunk_size; |
194 | size_t if_offset; | |
195 | void *data_ptr; | |
d0015fdd | 196 | |
64ae7445 | 197 | lockdep_assert_held(&orig_node->bat_iv.ogm_cnt_lock); |
d0015fdd AQ |
198 | |
199 | chunk_size = sizeof(unsigned long) * BATADV_NUM_WORDS; | |
0185dda6 | 200 | data_ptr = kmalloc_array(max_if_num, chunk_size, GFP_ATOMIC); |
d0015fdd | 201 | if (!data_ptr) |
64ae7445 SE |
202 | /* use old buffer when new one could not be allocated */ |
203 | data_ptr = orig_node->bat_iv.bcast_own; | |
d0015fdd AQ |
204 | |
205 | /* copy first part */ | |
64ae7445 | 206 | memmove(data_ptr, orig_node->bat_iv.bcast_own, del_if_num * chunk_size); |
d0015fdd AQ |
207 | |
208 | /* copy second part */ | |
13bbdd37 | 209 | if_offset = (del_if_num + 1) * chunk_size; |
64ae7445 SE |
210 | memmove((char *)data_ptr + del_if_num * chunk_size, |
211 | (uint8_t *)orig_node->bat_iv.bcast_own + if_offset, | |
212 | (max_if_num - del_if_num) * chunk_size); | |
d0015fdd | 213 | |
64ae7445 SE |
214 | /* bcast_own was shrunk down in new buffer; free old one */ |
215 | if (orig_node->bat_iv.bcast_own != data_ptr) { | |
216 | kfree(orig_node->bat_iv.bcast_own); | |
217 | orig_node->bat_iv.bcast_own = data_ptr; | |
218 | } | |
219 | } | |
d0015fdd | 220 | |
64ae7445 SE |
221 | /** |
222 | * batadv_iv_ogm_drop_bcast_own_sum_entry - drop section of bcast_own_sum | |
223 | * @orig_node: the orig_node that has to be changed | |
224 | * @max_if_num: the current amount of interfaces | |
225 | * @del_if_num: the index of the interface being removed | |
226 | */ | |
227 | static void | |
228 | batadv_iv_ogm_drop_bcast_own_sum_entry(struct batadv_orig_node *orig_node, | |
229 | int max_if_num, int del_if_num) | |
230 | { | |
231 | size_t if_offset; | |
232 | void *data_ptr; | |
233 | ||
234 | lockdep_assert_held(&orig_node->bat_iv.ogm_cnt_lock); | |
d0015fdd | 235 | |
6b5e971a | 236 | data_ptr = kmalloc_array(max_if_num, sizeof(u8), GFP_ATOMIC); |
64ae7445 SE |
237 | if (!data_ptr) |
238 | /* use old buffer when new one could not be allocated */ | |
239 | data_ptr = orig_node->bat_iv.bcast_own_sum; | |
d0015fdd | 240 | |
64ae7445 SE |
241 | memmove(data_ptr, orig_node->bat_iv.bcast_own_sum, |
242 | del_if_num * sizeof(u8)); | |
d0015fdd | 243 | |
6b5e971a | 244 | if_offset = (del_if_num + 1) * sizeof(u8); |
64ae7445 SE |
245 | memmove((char *)data_ptr + del_if_num * sizeof(u8), |
246 | orig_node->bat_iv.bcast_own_sum + if_offset, | |
247 | (max_if_num - del_if_num) * sizeof(u8)); | |
248 | ||
249 | /* bcast_own_sum was shrunk down in new buffer; free old one */ | |
250 | if (orig_node->bat_iv.bcast_own_sum != data_ptr) { | |
251 | kfree(orig_node->bat_iv.bcast_own_sum); | |
252 | orig_node->bat_iv.bcast_own_sum = data_ptr; | |
253 | } | |
254 | } | |
d0015fdd | 255 | |
64ae7445 SE |
256 | /** |
257 | * batadv_iv_ogm_orig_del_if - change the private structures of the orig_node to | |
258 | * exclude the removed interface | |
259 | * @orig_node: the orig_node that has to be changed | |
260 | * @max_if_num: the current amount of interfaces | |
261 | * @del_if_num: the index of the interface being removed | |
262 | * | |
263 | * Return: 0 on success, a negative error code otherwise. | |
264 | */ | |
265 | static int batadv_iv_ogm_orig_del_if(struct batadv_orig_node *orig_node, | |
266 | int max_if_num, int del_if_num) | |
267 | { | |
268 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
269 | ||
270 | if (max_if_num == 0) { | |
271 | kfree(orig_node->bat_iv.bcast_own); | |
272 | kfree(orig_node->bat_iv.bcast_own_sum); | |
273 | orig_node->bat_iv.bcast_own = NULL; | |
274 | orig_node->bat_iv.bcast_own_sum = NULL; | |
275 | } else { | |
276 | batadv_iv_ogm_drop_bcast_own_entry(orig_node, max_if_num, | |
277 | del_if_num); | |
278 | batadv_iv_ogm_drop_bcast_own_sum_entry(orig_node, max_if_num, | |
279 | del_if_num); | |
280 | } | |
d0015fdd | 281 | |
d0015fdd AQ |
282 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
283 | ||
64ae7445 | 284 | return 0; |
d0015fdd AQ |
285 | } |
286 | ||
bbad0a5e AQ |
287 | /** |
288 | * batadv_iv_ogm_orig_get - retrieve or create (if does not exist) an originator | |
289 | * @bat_priv: the bat priv with all the soft interface information | |
290 | * @addr: mac address of the originator | |
291 | * | |
62fe710f | 292 | * Return: the originator object corresponding to the passed mac address or NULL |
bbad0a5e AQ |
293 | * on failure. |
294 | * If the object does not exists it is created an initialised. | |
295 | */ | |
296 | static struct batadv_orig_node * | |
6b5e971a | 297 | batadv_iv_ogm_orig_get(struct batadv_priv *bat_priv, const u8 *addr) |
bbad0a5e AQ |
298 | { |
299 | struct batadv_orig_node *orig_node; | |
300 | int size, hash_added; | |
301 | ||
302 | orig_node = batadv_orig_hash_find(bat_priv, addr); | |
303 | if (orig_node) | |
304 | return orig_node; | |
305 | ||
306 | orig_node = batadv_orig_node_new(bat_priv, addr); | |
307 | if (!orig_node) | |
308 | return NULL; | |
309 | ||
310 | spin_lock_init(&orig_node->bat_iv.ogm_cnt_lock); | |
311 | ||
312 | size = bat_priv->num_ifaces * sizeof(unsigned long) * BATADV_NUM_WORDS; | |
313 | orig_node->bat_iv.bcast_own = kzalloc(size, GFP_ATOMIC); | |
314 | if (!orig_node->bat_iv.bcast_own) | |
315 | goto free_orig_node; | |
316 | ||
6b5e971a | 317 | size = bat_priv->num_ifaces * sizeof(u8); |
bbad0a5e AQ |
318 | orig_node->bat_iv.bcast_own_sum = kzalloc(size, GFP_ATOMIC); |
319 | if (!orig_node->bat_iv.bcast_own_sum) | |
a5a5cb8c | 320 | goto free_orig_node; |
bbad0a5e AQ |
321 | |
322 | hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig, | |
323 | batadv_choose_orig, orig_node, | |
324 | &orig_node->hash_entry); | |
325 | if (hash_added != 0) | |
a5a5cb8c | 326 | goto free_orig_node; |
bbad0a5e AQ |
327 | |
328 | return orig_node; | |
329 | ||
bbad0a5e | 330 | free_orig_node: |
b2262df7 | 331 | /* free twice, as batadv_orig_node_new sets refcount to 2 */ |
5d967310 SE |
332 | batadv_orig_node_put(orig_node); |
333 | batadv_orig_node_put(orig_node); | |
bbad0a5e AQ |
334 | |
335 | return NULL; | |
336 | } | |
337 | ||
56303d34 SE |
338 | static struct batadv_neigh_node * |
339 | batadv_iv_ogm_neigh_new(struct batadv_hard_iface *hard_iface, | |
6b5e971a | 340 | const u8 *neigh_addr, |
56303d34 | 341 | struct batadv_orig_node *orig_node, |
863dd7a8 | 342 | struct batadv_orig_node *orig_neigh) |
7ae8b285 | 343 | { |
741aa06b | 344 | struct batadv_neigh_node *neigh_node; |
7ae8b285 | 345 | |
6f0a6b5e ML |
346 | neigh_node = batadv_neigh_node_get_or_create(orig_node, |
347 | hard_iface, neigh_addr); | |
7ae8b285 ML |
348 | if (!neigh_node) |
349 | goto out; | |
350 | ||
89652331 | 351 | neigh_node->orig_node = orig_neigh; |
7ae8b285 | 352 | |
7ae8b285 ML |
353 | out: |
354 | return neigh_node; | |
355 | } | |
356 | ||
56303d34 | 357 | static int batadv_iv_ogm_iface_enable(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 358 | { |
96412690 | 359 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 360 | unsigned char *ogm_buff; |
6b5e971a | 361 | u32 random_seqno; |
d7d32ec0 ML |
362 | |
363 | /* randomize initial seqno to avoid collision */ | |
364 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
14511519 | 365 | atomic_set(&hard_iface->bat_iv.ogm_seqno, random_seqno); |
d0b9fd89 | 366 | |
14511519 ML |
367 | hard_iface->bat_iv.ogm_buff_len = BATADV_OGM_HLEN; |
368 | ogm_buff = kmalloc(hard_iface->bat_iv.ogm_buff_len, GFP_ATOMIC); | |
369 | if (!ogm_buff) | |
42d9f2cb | 370 | return -ENOMEM; |
77af7575 | 371 | |
14511519 ML |
372 | hard_iface->bat_iv.ogm_buff = ogm_buff; |
373 | ||
374 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; | |
a40d9b07 SW |
375 | batadv_ogm_packet->packet_type = BATADV_IV_OGM; |
376 | batadv_ogm_packet->version = BATADV_COMPAT_VERSION; | |
377 | batadv_ogm_packet->ttl = 2; | |
96412690 | 378 | batadv_ogm_packet->flags = BATADV_NO_FLAGS; |
414254e3 | 379 | batadv_ogm_packet->reserved = 0; |
96412690 | 380 | batadv_ogm_packet->tq = BATADV_TQ_MAX_VALUE; |
77af7575 | 381 | |
42d9f2cb | 382 | return 0; |
d0b9fd89 ML |
383 | } |
384 | ||
56303d34 | 385 | static void batadv_iv_ogm_iface_disable(struct batadv_hard_iface *hard_iface) |
00a50076 | 386 | { |
14511519 ML |
387 | kfree(hard_iface->bat_iv.ogm_buff); |
388 | hard_iface->bat_iv.ogm_buff = NULL; | |
00a50076 ML |
389 | } |
390 | ||
56303d34 | 391 | static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 392 | { |
96412690 | 393 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 394 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 395 | |
14511519 | 396 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
8fdd0153 AQ |
397 | ether_addr_copy(batadv_ogm_packet->orig, |
398 | hard_iface->net_dev->dev_addr); | |
399 | ether_addr_copy(batadv_ogm_packet->prev_sender, | |
400 | hard_iface->net_dev->dev_addr); | |
d0b9fd89 ML |
401 | } |
402 | ||
56303d34 SE |
403 | static void |
404 | batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface) | |
d0b9fd89 | 405 | { |
96412690 | 406 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 407 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 408 | |
14511519 | 409 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
a40d9b07 | 410 | batadv_ogm_packet->ttl = BATADV_TTL; |
d0b9fd89 ML |
411 | } |
412 | ||
b9dacc52 | 413 | /* when do we schedule our own ogm to be sent */ |
fe8bc396 | 414 | static unsigned long |
56303d34 | 415 | batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv) |
b9dacc52 | 416 | { |
42d0b044 SE |
417 | unsigned int msecs; |
418 | ||
419 | msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER; | |
e76e4320 | 420 | msecs += prandom_u32() % (2 * BATADV_JITTER); |
42d0b044 SE |
421 | |
422 | return jiffies + msecs_to_jiffies(msecs); | |
b9dacc52 ML |
423 | } |
424 | ||
425 | /* when do we schedule a ogm packet to be sent */ | |
fe8bc396 | 426 | static unsigned long batadv_iv_ogm_fwd_send_time(void) |
b9dacc52 | 427 | { |
e76e4320 | 428 | return jiffies + msecs_to_jiffies(prandom_u32() % (BATADV_JITTER / 2)); |
b9dacc52 ML |
429 | } |
430 | ||
431 | /* apply hop penalty for a normal link */ | |
6b5e971a | 432 | static u8 batadv_hop_penalty(u8 tq, const struct batadv_priv *bat_priv) |
b9dacc52 ML |
433 | { |
434 | int hop_penalty = atomic_read(&bat_priv->hop_penalty); | |
42d0b044 SE |
435 | int new_tq; |
436 | ||
437 | new_tq = tq * (BATADV_TQ_MAX_VALUE - hop_penalty); | |
438 | new_tq /= BATADV_TQ_MAX_VALUE; | |
439 | ||
440 | return new_tq; | |
b9dacc52 ML |
441 | } |
442 | ||
600184b7 SW |
443 | /** |
444 | * batadv_iv_ogm_aggr_packet - checks if there is another OGM attached | |
445 | * @buff_pos: current position in the skb | |
446 | * @packet_len: total length of the skb | |
447 | * @tvlv_len: tvlv length of the previously considered OGM | |
448 | * | |
449 | * Return: true if there is enough space for another OGM, false otherwise. | |
450 | */ | |
9fd9b19e MP |
451 | static bool batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len, |
452 | __be16 tvlv_len) | |
fc957275 | 453 | { |
08c36d3e SE |
454 | int next_buff_pos = 0; |
455 | ||
7e071c79 | 456 | next_buff_pos += buff_pos + BATADV_OGM_HLEN; |
ef261577 | 457 | next_buff_pos += ntohs(tvlv_len); |
fc957275 ML |
458 | |
459 | return (next_buff_pos <= packet_len) && | |
42d0b044 | 460 | (next_buff_pos <= BATADV_MAX_AGGREGATION_BYTES); |
fc957275 ML |
461 | } |
462 | ||
b9dacc52 | 463 | /* send a batman ogm to a given interface */ |
56303d34 SE |
464 | static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, |
465 | struct batadv_hard_iface *hard_iface) | |
b9dacc52 | 466 | { |
56303d34 | 467 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
de12baec | 468 | const char *fwd_str; |
6b5e971a SE |
469 | u8 packet_num; |
470 | s16 buff_pos; | |
96412690 | 471 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 472 | struct sk_buff *skb; |
6b5e971a | 473 | u8 *packet_pos; |
b9dacc52 | 474 | |
e9a4f295 | 475 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
b9dacc52 ML |
476 | return; |
477 | ||
478 | packet_num = 0; | |
479 | buff_pos = 0; | |
c67893d1 SE |
480 | packet_pos = forw_packet->skb->data; |
481 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
482 | |
483 | /* adjust all flags and log packets */ | |
fe8bc396 | 484 | while (batadv_iv_ogm_aggr_packet(buff_pos, forw_packet->packet_len, |
ef261577 | 485 | batadv_ogm_packet->tvlv_len)) { |
b9dacc52 | 486 | /* we might have aggregated direct link packets with an |
9cfc7bd6 SE |
487 | * ordinary base packet |
488 | */ | |
8de47de5 SE |
489 | if (forw_packet->direct_link_flags & BIT(packet_num) && |
490 | forw_packet->if_incoming == hard_iface) | |
96412690 | 491 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 492 | else |
96412690 | 493 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 494 | |
c67893d1 SE |
495 | if (packet_num > 0 || !forw_packet->own) |
496 | fwd_str = "Forwarding"; | |
497 | else | |
498 | fwd_str = "Sending own"; | |
499 | ||
39c75a51 | 500 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
e1bf0c14 | 501 | "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s) on interface %s [%pM]\n", |
1eda58bf | 502 | fwd_str, (packet_num > 0 ? "aggregated " : ""), |
96412690 SE |
503 | batadv_ogm_packet->orig, |
504 | ntohl(batadv_ogm_packet->seqno), | |
a40d9b07 | 505 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl, |
a2f2b6cd | 506 | ((batadv_ogm_packet->flags & BATADV_DIRECTLINK) ? |
1eda58bf | 507 | "on" : "off"), |
e1bf0c14 | 508 | hard_iface->net_dev->name, |
1eda58bf | 509 | hard_iface->net_dev->dev_addr); |
b9dacc52 | 510 | |
7e071c79 | 511 | buff_pos += BATADV_OGM_HLEN; |
ef261577 | 512 | buff_pos += ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 513 | packet_num++; |
c67893d1 SE |
514 | packet_pos = forw_packet->skb->data + buff_pos; |
515 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
516 | } |
517 | ||
518 | /* create clone because function is called more than once */ | |
519 | skb = skb_clone(forw_packet->skb, GFP_ATOMIC); | |
f8214865 | 520 | if (skb) { |
d69909d2 SE |
521 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_TX); |
522 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_TX_BYTES, | |
f8214865 | 523 | skb->len + ETH_HLEN); |
95d39278 | 524 | batadv_send_broadcast_skb(skb, hard_iface); |
f8214865 | 525 | } |
b9dacc52 ML |
526 | } |
527 | ||
528 | /* send a batman ogm packet */ | |
56303d34 | 529 | static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) |
b9dacc52 | 530 | { |
b9dacc52 | 531 | struct net_device *soft_iface; |
b9dacc52 ML |
532 | |
533 | if (!forw_packet->if_incoming) { | |
86ceb360 | 534 | pr_err("Error - can't forward packet: incoming iface not specified\n"); |
f55a2e84 | 535 | return; |
b9dacc52 ML |
536 | } |
537 | ||
538 | soft_iface = forw_packet->if_incoming->soft_iface; | |
b9dacc52 | 539 | |
ef0a937f | 540 | if (WARN_ON(!forw_packet->if_outgoing)) |
f55a2e84 | 541 | return; |
b9dacc52 | 542 | |
ef0a937f | 543 | if (WARN_ON(forw_packet->if_outgoing->soft_iface != soft_iface)) |
f55a2e84 | 544 | return; |
b9dacc52 | 545 | |
ef0a937f | 546 | if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) |
f55a2e84 | 547 | return; |
b9dacc52 | 548 | |
ef0a937f SW |
549 | /* only for one specific outgoing interface */ |
550 | batadv_iv_ogm_send_to_if(forw_packet, forw_packet->if_outgoing); | |
b9dacc52 ML |
551 | } |
552 | ||
ef0a937f SW |
553 | /** |
554 | * batadv_iv_ogm_can_aggregate - find out if an OGM can be aggregated on an | |
555 | * existing forward packet | |
556 | * @new_bat_ogm_packet: OGM packet to be aggregated | |
557 | * @bat_priv: the bat priv with all the soft interface information | |
558 | * @packet_len: (total) length of the OGM | |
559 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
95298a91 | 560 | * @directlink: true if this is a direct link packet |
ef0a937f SW |
561 | * @if_incoming: interface where the packet was received |
562 | * @if_outgoing: interface for which the retransmission should be considered | |
563 | * @forw_packet: the forwarded packet which should be checked | |
564 | * | |
62fe710f | 565 | * Return: true if new_packet can be aggregated with forw_packet |
ef0a937f | 566 | */ |
fe8bc396 | 567 | static bool |
96412690 | 568 | batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, |
56303d34 | 569 | struct batadv_priv *bat_priv, |
fe8bc396 SE |
570 | int packet_len, unsigned long send_time, |
571 | bool directlink, | |
56303d34 | 572 | const struct batadv_hard_iface *if_incoming, |
ef0a937f | 573 | const struct batadv_hard_iface *if_outgoing, |
56303d34 | 574 | const struct batadv_forw_packet *forw_packet) |
b9dacc52 | 575 | { |
96412690 | 576 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 577 | int aggregated_bytes = forw_packet->packet_len + packet_len; |
56303d34 | 578 | struct batadv_hard_iface *primary_if = NULL; |
b9dacc52 | 579 | bool res = false; |
42d0b044 | 580 | unsigned long aggregation_end_time; |
b9dacc52 | 581 | |
96412690 | 582 | batadv_ogm_packet = (struct batadv_ogm_packet *)forw_packet->skb->data; |
42d0b044 SE |
583 | aggregation_end_time = send_time; |
584 | aggregation_end_time += msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); | |
b9dacc52 | 585 | |
9cfc7bd6 | 586 | /* we can aggregate the current packet to this aggregated packet |
b9dacc52 ML |
587 | * if: |
588 | * | |
589 | * - the send time is within our MAX_AGGREGATION_MS time | |
590 | * - the resulting packet wont be bigger than | |
591 | * MAX_AGGREGATION_BYTES | |
8f34b388 | 592 | * otherwise aggregation is not possible |
b9dacc52 | 593 | */ |
8f34b388 MP |
594 | if (!time_before(send_time, forw_packet->send_time) || |
595 | !time_after_eq(aggregation_end_time, forw_packet->send_time)) | |
596 | return false; | |
597 | ||
598 | if (aggregated_bytes > BATADV_MAX_AGGREGATION_BYTES) | |
599 | return false; | |
600 | ||
601 | /* packet is not leaving on the same interface. */ | |
602 | if (forw_packet->if_outgoing != if_outgoing) | |
603 | return false; | |
604 | ||
605 | /* check aggregation compatibility | |
606 | * -> direct link packets are broadcasted on | |
607 | * their interface only | |
608 | * -> aggregate packet if the current packet is | |
609 | * a "global" packet as well as the base | |
610 | * packet | |
611 | */ | |
612 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
613 | if (!primary_if) | |
614 | return false; | |
ef0a937f | 615 | |
8f34b388 MP |
616 | /* packets without direct link flag and high TTL |
617 | * are flooded through the net | |
618 | */ | |
619 | if (!directlink && | |
620 | !(batadv_ogm_packet->flags & BATADV_DIRECTLINK) && | |
621 | batadv_ogm_packet->ttl != 1 && | |
622 | ||
623 | /* own packets originating non-primary | |
624 | * interfaces leave only that interface | |
625 | */ | |
626 | (!forw_packet->own || | |
627 | forw_packet->if_incoming == primary_if)) { | |
628 | res = true; | |
629 | goto out; | |
630 | } | |
b9dacc52 | 631 | |
8f34b388 MP |
632 | /* if the incoming packet is sent via this one |
633 | * interface only - we still can aggregate | |
634 | */ | |
635 | if (directlink && | |
636 | new_bat_ogm_packet->ttl == 1 && | |
637 | forw_packet->if_incoming == if_incoming && | |
638 | ||
639 | /* packets from direct neighbors or | |
640 | * own secondary interface packets | |
641 | * (= secondary interface packets in general) | |
642 | */ | |
643 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK || | |
644 | (forw_packet->own && | |
645 | forw_packet->if_incoming != primary_if))) { | |
646 | res = true; | |
647 | goto out; | |
b9dacc52 ML |
648 | } |
649 | ||
650 | out: | |
651 | if (primary_if) | |
82047ad7 | 652 | batadv_hardif_put(primary_if); |
b9dacc52 ML |
653 | return res; |
654 | } | |
655 | ||
1b371d13 SW |
656 | /** |
657 | * batadv_iv_ogm_aggregate_new - create a new aggregated packet and add this | |
ef0a937f SW |
658 | * packet to it. |
659 | * @packet_buff: pointer to the OGM | |
660 | * @packet_len: (total) length of the OGM | |
661 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
662 | * @direct_link: whether this OGM has direct link status | |
663 | * @if_incoming: interface where the packet was received | |
664 | * @if_outgoing: interface for which the retransmission should be considered | |
665 | * @own_packet: true if it is a self-generated ogm | |
666 | */ | |
fe8bc396 SE |
667 | static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, |
668 | int packet_len, unsigned long send_time, | |
669 | bool direct_link, | |
56303d34 | 670 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 671 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 672 | int own_packet) |
b9dacc52 | 673 | { |
56303d34 SE |
674 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
675 | struct batadv_forw_packet *forw_packet_aggr; | |
b9dacc52 | 676 | unsigned char *skb_buff; |
42d0b044 | 677 | unsigned int skb_size; |
b9dacc52 | 678 | |
b9dacc52 ML |
679 | /* own packet should always be scheduled */ |
680 | if (!own_packet) { | |
3e34819e | 681 | if (!batadv_atomic_dec_not_zero(&bat_priv->batman_queue_left)) { |
39c75a51 | 682 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 683 | "batman packet queue full\n"); |
17a86915 | 684 | return; |
b9dacc52 ML |
685 | } |
686 | } | |
687 | ||
688 | forw_packet_aggr = kmalloc(sizeof(*forw_packet_aggr), GFP_ATOMIC); | |
940d156f MP |
689 | if (!forw_packet_aggr) |
690 | goto out_nomem; | |
b9dacc52 | 691 | |
940d156f MP |
692 | if (atomic_read(&bat_priv->aggregated_ogms) && |
693 | packet_len < BATADV_MAX_AGGREGATION_BYTES) | |
5b246574 | 694 | skb_size = BATADV_MAX_AGGREGATION_BYTES; |
b9dacc52 | 695 | else |
5b246574 SE |
696 | skb_size = packet_len; |
697 | ||
41ab6c48 | 698 | skb_size += ETH_HLEN; |
b9dacc52 | 699 | |
41ab6c48 | 700 | forw_packet_aggr->skb = netdev_alloc_skb_ip_align(NULL, skb_size); |
940d156f MP |
701 | if (!forw_packet_aggr->skb) |
702 | goto out_free_forw_packet; | |
c54f38c9 | 703 | forw_packet_aggr->skb->priority = TC_PRIO_CONTROL; |
41ab6c48 | 704 | skb_reserve(forw_packet_aggr->skb, ETH_HLEN); |
b9dacc52 | 705 | |
b9dacc52 ML |
706 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); |
707 | forw_packet_aggr->packet_len = packet_len; | |
708 | memcpy(skb_buff, packet_buff, packet_len); | |
709 | ||
17a86915 SE |
710 | kref_get(&if_incoming->refcount); |
711 | kref_get(&if_outgoing->refcount); | |
b9dacc52 ML |
712 | forw_packet_aggr->own = own_packet; |
713 | forw_packet_aggr->if_incoming = if_incoming; | |
ef0a937f | 714 | forw_packet_aggr->if_outgoing = if_outgoing; |
b9dacc52 | 715 | forw_packet_aggr->num_packets = 0; |
42d0b044 | 716 | forw_packet_aggr->direct_link_flags = BATADV_NO_FLAGS; |
b9dacc52 ML |
717 | forw_packet_aggr->send_time = send_time; |
718 | ||
719 | /* save packet direct link flag status */ | |
720 | if (direct_link) | |
721 | forw_packet_aggr->direct_link_flags |= 1; | |
722 | ||
723 | /* add new packet to packet list */ | |
724 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
725 | hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list); | |
726 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
727 | ||
728 | /* start timer for this packet */ | |
729 | INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work, | |
f0d97253 | 730 | batadv_iv_send_outstanding_bat_ogm_packet); |
3193e8fd | 731 | queue_delayed_work(batadv_event_workqueue, |
b9dacc52 ML |
732 | &forw_packet_aggr->delayed_work, |
733 | send_time - jiffies); | |
734 | ||
735 | return; | |
940d156f MP |
736 | out_free_forw_packet: |
737 | kfree(forw_packet_aggr); | |
738 | out_nomem: | |
739 | if (!own_packet) | |
740 | atomic_inc(&bat_priv->batman_queue_left); | |
b9dacc52 ML |
741 | } |
742 | ||
743 | /* aggregate a new packet into the existing ogm packet */ | |
56303d34 | 744 | static void batadv_iv_ogm_aggregate(struct batadv_forw_packet *forw_packet_aggr, |
fe8bc396 SE |
745 | const unsigned char *packet_buff, |
746 | int packet_len, bool direct_link) | |
b9dacc52 ML |
747 | { |
748 | unsigned char *skb_buff; | |
8de47de5 | 749 | unsigned long new_direct_link_flag; |
b9dacc52 ML |
750 | |
751 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); | |
752 | memcpy(skb_buff, packet_buff, packet_len); | |
753 | forw_packet_aggr->packet_len += packet_len; | |
754 | forw_packet_aggr->num_packets++; | |
755 | ||
756 | /* save packet direct link flag status */ | |
8de47de5 SE |
757 | if (direct_link) { |
758 | new_direct_link_flag = BIT(forw_packet_aggr->num_packets); | |
759 | forw_packet_aggr->direct_link_flags |= new_direct_link_flag; | |
760 | } | |
b9dacc52 ML |
761 | } |
762 | ||
ef0a937f SW |
763 | /** |
764 | * batadv_iv_ogm_queue_add - queue up an OGM for transmission | |
765 | * @bat_priv: the bat priv with all the soft interface information | |
766 | * @packet_buff: pointer to the OGM | |
767 | * @packet_len: (total) length of the OGM | |
768 | * @if_incoming: interface where the packet was received | |
769 | * @if_outgoing: interface for which the retransmission should be considered | |
770 | * @own_packet: true if it is a self-generated ogm | |
771 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
772 | */ | |
56303d34 | 773 | static void batadv_iv_ogm_queue_add(struct batadv_priv *bat_priv, |
fe8bc396 SE |
774 | unsigned char *packet_buff, |
775 | int packet_len, | |
56303d34 | 776 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 777 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 778 | int own_packet, unsigned long send_time) |
b9dacc52 | 779 | { |
9cfc7bd6 | 780 | /* _aggr -> pointer to the packet we want to aggregate with |
b9dacc52 ML |
781 | * _pos -> pointer to the position in the queue |
782 | */ | |
56303d34 SE |
783 | struct batadv_forw_packet *forw_packet_aggr = NULL; |
784 | struct batadv_forw_packet *forw_packet_pos = NULL; | |
96412690 | 785 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 786 | bool direct_link; |
42d0b044 | 787 | unsigned long max_aggregation_jiffies; |
b9dacc52 | 788 | |
96412690 | 789 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
56489151 | 790 | direct_link = !!(batadv_ogm_packet->flags & BATADV_DIRECTLINK); |
42d0b044 | 791 | max_aggregation_jiffies = msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); |
b9dacc52 ML |
792 | |
793 | /* find position for the packet in the forward queue */ | |
794 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
795 | /* own packets are not to be aggregated */ | |
56489151 | 796 | if (atomic_read(&bat_priv->aggregated_ogms) && !own_packet) { |
b67bfe0d | 797 | hlist_for_each_entry(forw_packet_pos, |
b9dacc52 | 798 | &bat_priv->forw_bat_list, list) { |
96412690 | 799 | if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet, |
fe8bc396 SE |
800 | bat_priv, packet_len, |
801 | send_time, direct_link, | |
802 | if_incoming, | |
ef0a937f | 803 | if_outgoing, |
fe8bc396 | 804 | forw_packet_pos)) { |
b9dacc52 ML |
805 | forw_packet_aggr = forw_packet_pos; |
806 | break; | |
807 | } | |
808 | } | |
809 | } | |
810 | ||
811 | /* nothing to aggregate with - either aggregation disabled or no | |
9cfc7bd6 SE |
812 | * suitable aggregation packet found |
813 | */ | |
b9dacc52 ML |
814 | if (!forw_packet_aggr) { |
815 | /* the following section can run without the lock */ | |
816 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
817 | ||
9cfc7bd6 | 818 | /* if we could not aggregate this packet with one of the others |
b9dacc52 ML |
819 | * we hold it back for a while, so that it might be aggregated |
820 | * later on | |
821 | */ | |
42d0b044 SE |
822 | if (!own_packet && atomic_read(&bat_priv->aggregated_ogms)) |
823 | send_time += max_aggregation_jiffies; | |
b9dacc52 | 824 | |
fe8bc396 SE |
825 | batadv_iv_ogm_aggregate_new(packet_buff, packet_len, |
826 | send_time, direct_link, | |
ef0a937f SW |
827 | if_incoming, if_outgoing, |
828 | own_packet); | |
b9dacc52 | 829 | } else { |
fe8bc396 SE |
830 | batadv_iv_ogm_aggregate(forw_packet_aggr, packet_buff, |
831 | packet_len, direct_link); | |
b9dacc52 ML |
832 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
833 | } | |
834 | } | |
835 | ||
56303d34 | 836 | static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, |
fe8bc396 | 837 | const struct ethhdr *ethhdr, |
96412690 | 838 | struct batadv_ogm_packet *batadv_ogm_packet, |
fe8bc396 SE |
839 | bool is_single_hop_neigh, |
840 | bool is_from_best_next_hop, | |
ef0a937f SW |
841 | struct batadv_hard_iface *if_incoming, |
842 | struct batadv_hard_iface *if_outgoing) | |
b9dacc52 | 843 | { |
56303d34 | 844 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
6b5e971a | 845 | u16 tvlv_len; |
b9dacc52 | 846 | |
a40d9b07 | 847 | if (batadv_ogm_packet->ttl <= 1) { |
39c75a51 | 848 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n"); |
b9dacc52 ML |
849 | return; |
850 | } | |
851 | ||
13b2541b ML |
852 | if (!is_from_best_next_hop) { |
853 | /* Mark the forwarded packet when it is not coming from our | |
854 | * best next hop. We still need to forward the packet for our | |
855 | * neighbor link quality detection to work in case the packet | |
856 | * originated from a single hop neighbor. Otherwise we can | |
857 | * simply drop the ogm. | |
858 | */ | |
859 | if (is_single_hop_neigh) | |
96412690 | 860 | batadv_ogm_packet->flags |= BATADV_NOT_BEST_NEXT_HOP; |
13b2541b ML |
861 | else |
862 | return; | |
863 | } | |
b9dacc52 | 864 | |
ef261577 | 865 | tvlv_len = ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 866 | |
a40d9b07 | 867 | batadv_ogm_packet->ttl--; |
8fdd0153 | 868 | ether_addr_copy(batadv_ogm_packet->prev_sender, ethhdr->h_source); |
b9dacc52 | 869 | |
b9dacc52 | 870 | /* apply hop penalty */ |
96412690 | 871 | batadv_ogm_packet->tq = batadv_hop_penalty(batadv_ogm_packet->tq, |
fe8bc396 | 872 | bat_priv); |
b9dacc52 | 873 | |
39c75a51 | 874 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 875 | "Forwarding packet: tq: %i, ttl: %i\n", |
a40d9b07 | 876 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl); |
b9dacc52 | 877 | |
75cd33f8 | 878 | if (is_single_hop_neigh) |
96412690 | 879 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 880 | else |
96412690 | 881 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 882 | |
96412690 | 883 | batadv_iv_ogm_queue_add(bat_priv, (unsigned char *)batadv_ogm_packet, |
ef261577 | 884 | BATADV_OGM_HLEN + tvlv_len, |
ef0a937f SW |
885 | if_incoming, if_outgoing, 0, |
886 | batadv_iv_ogm_fwd_send_time()); | |
b9dacc52 ML |
887 | } |
888 | ||
d9896617 AQ |
889 | /** |
890 | * batadv_iv_ogm_slide_own_bcast_window - bitshift own OGM broadcast windows for | |
891 | * the given interface | |
892 | * @hard_iface: the interface for which the windows have to be shifted | |
893 | */ | |
894 | static void | |
895 | batadv_iv_ogm_slide_own_bcast_window(struct batadv_hard_iface *hard_iface) | |
896 | { | |
897 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); | |
898 | struct batadv_hashtable *hash = bat_priv->orig_hash; | |
899 | struct hlist_head *head; | |
900 | struct batadv_orig_node *orig_node; | |
901 | unsigned long *word; | |
6b5e971a | 902 | u32 i; |
d9896617 | 903 | size_t word_index; |
6b5e971a | 904 | u8 *w; |
bbad0a5e | 905 | int if_num; |
d9896617 AQ |
906 | |
907 | for (i = 0; i < hash->size; i++) { | |
908 | head = &hash->table[i]; | |
909 | ||
910 | rcu_read_lock(); | |
911 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
bbad0a5e | 912 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
d9896617 | 913 | word_index = hard_iface->if_num * BATADV_NUM_WORDS; |
32db6aaa | 914 | word = &orig_node->bat_iv.bcast_own[word_index]; |
d9896617 AQ |
915 | |
916 | batadv_bit_get_packet(bat_priv, word, 1, 0); | |
bbad0a5e AQ |
917 | if_num = hard_iface->if_num; |
918 | w = &orig_node->bat_iv.bcast_own_sum[if_num]; | |
d9896617 | 919 | *w = bitmap_weight(word, BATADV_TQ_LOCAL_WINDOW_SIZE); |
bbad0a5e | 920 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
d9896617 AQ |
921 | } |
922 | rcu_read_unlock(); | |
923 | } | |
924 | } | |
925 | ||
56303d34 | 926 | static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) |
b9dacc52 | 927 | { |
56303d34 | 928 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
14511519 | 929 | unsigned char **ogm_buff = &hard_iface->bat_iv.ogm_buff; |
96412690 | 930 | struct batadv_ogm_packet *batadv_ogm_packet; |
ef0a937f | 931 | struct batadv_hard_iface *primary_if, *tmp_hard_iface; |
14511519 | 932 | int *ogm_buff_len = &hard_iface->bat_iv.ogm_buff_len; |
6b5e971a SE |
933 | u32 seqno; |
934 | u16 tvlv_len = 0; | |
ef0a937f | 935 | unsigned long send_time; |
b9dacc52 | 936 | |
f0d97253 AQ |
937 | if ((hard_iface->if_status == BATADV_IF_NOT_IN_USE) || |
938 | (hard_iface->if_status == BATADV_IF_TO_BE_REMOVED)) | |
939 | return; | |
940 | ||
941 | /* the interface gets activated here to avoid race conditions between | |
942 | * the moment of activating the interface in | |
943 | * hardif_activate_interface() where the originator mac is set and | |
944 | * outdated packets (especially uninitialized mac addresses) in the | |
945 | * packet queue | |
946 | */ | |
947 | if (hard_iface->if_status == BATADV_IF_TO_BE_ACTIVATED) | |
948 | hard_iface->if_status = BATADV_IF_ACTIVE; | |
949 | ||
e5d89254 | 950 | primary_if = batadv_primary_if_get_selected(bat_priv); |
b9dacc52 | 951 | |
e1bf0c14 ML |
952 | if (hard_iface == primary_if) { |
953 | /* tt changes have to be committed before the tvlv data is | |
954 | * appended as it may alter the tt tvlv container | |
955 | */ | |
956 | batadv_tt_local_commit_changes(bat_priv); | |
ef261577 ML |
957 | tvlv_len = batadv_tvlv_container_ogm_append(bat_priv, ogm_buff, |
958 | ogm_buff_len, | |
959 | BATADV_OGM_HLEN); | |
e1bf0c14 | 960 | } |
be9aa4c1 | 961 | |
14511519 | 962 | batadv_ogm_packet = (struct batadv_ogm_packet *)(*ogm_buff); |
ef261577 | 963 | batadv_ogm_packet->tvlv_len = htons(tvlv_len); |
b9dacc52 ML |
964 | |
965 | /* change sequence number to network order */ | |
6b5e971a | 966 | seqno = (u32)atomic_read(&hard_iface->bat_iv.ogm_seqno); |
bbb1f90e | 967 | batadv_ogm_packet->seqno = htonl(seqno); |
14511519 | 968 | atomic_inc(&hard_iface->bat_iv.ogm_seqno); |
b9dacc52 | 969 | |
d9896617 | 970 | batadv_iv_ogm_slide_own_bcast_window(hard_iface); |
b9dacc52 | 971 | |
ef0a937f SW |
972 | send_time = batadv_iv_ogm_emit_send_time(bat_priv); |
973 | ||
974 | if (hard_iface != primary_if) { | |
975 | /* OGMs from secondary interfaces are only scheduled on their | |
976 | * respective interfaces. | |
977 | */ | |
978 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, *ogm_buff_len, | |
979 | hard_iface, hard_iface, 1, send_time); | |
980 | goto out; | |
981 | } | |
982 | ||
983 | /* OGMs from primary interfaces are scheduled on all | |
984 | * interfaces. | |
985 | */ | |
986 | rcu_read_lock(); | |
987 | list_for_each_entry_rcu(tmp_hard_iface, &batadv_hardif_list, list) { | |
988 | if (tmp_hard_iface->soft_iface != hard_iface->soft_iface) | |
87b40f53 | 989 | continue; |
27353446 SE |
990 | |
991 | if (!kref_get_unless_zero(&tmp_hard_iface->refcount)) | |
992 | continue; | |
993 | ||
ef0a937f SW |
994 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, |
995 | *ogm_buff_len, hard_iface, | |
996 | tmp_hard_iface, 1, send_time); | |
27353446 SE |
997 | |
998 | batadv_hardif_put(tmp_hard_iface); | |
ef0a937f SW |
999 | } |
1000 | rcu_read_unlock(); | |
1001 | ||
1002 | out: | |
b9dacc52 | 1003 | if (primary_if) |
82047ad7 | 1004 | batadv_hardif_put(primary_if); |
b9dacc52 ML |
1005 | } |
1006 | ||
89652331 SW |
1007 | /** |
1008 | * batadv_iv_ogm_orig_update - use OGM to update corresponding data in an | |
1009 | * originator | |
1010 | * @bat_priv: the bat priv with all the soft interface information | |
1011 | * @orig_node: the orig node who originally emitted the ogm packet | |
7351a482 | 1012 | * @orig_ifinfo: ifinfo for the outgoing interface of the orig_node |
89652331 SW |
1013 | * @ethhdr: Ethernet header of the OGM |
1014 | * @batadv_ogm_packet: the ogm packet | |
1015 | * @if_incoming: interface where the packet was received | |
1016 | * @if_outgoing: interface for which the retransmission should be considered | |
89652331 SW |
1017 | * @dup_status: the duplicate status of this ogm packet. |
1018 | */ | |
fe8bc396 | 1019 | static void |
56303d34 SE |
1020 | batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, |
1021 | struct batadv_orig_node *orig_node, | |
7351a482 | 1022 | struct batadv_orig_ifinfo *orig_ifinfo, |
fe8bc396 | 1023 | const struct ethhdr *ethhdr, |
96412690 | 1024 | const struct batadv_ogm_packet *batadv_ogm_packet, |
56303d34 | 1025 | struct batadv_hard_iface *if_incoming, |
89652331 | 1026 | struct batadv_hard_iface *if_outgoing, |
7c24bbbe | 1027 | enum batadv_dup_status dup_status) |
fc957275 | 1028 | { |
89652331 SW |
1029 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL; |
1030 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; | |
4f248cff SE |
1031 | struct batadv_neigh_node *neigh_node = NULL; |
1032 | struct batadv_neigh_node *tmp_neigh_node = NULL; | |
56303d34 SE |
1033 | struct batadv_neigh_node *router = NULL; |
1034 | struct batadv_orig_node *orig_node_tmp; | |
7caf69fb | 1035 | int if_num; |
6b5e971a SE |
1036 | u8 sum_orig, sum_neigh; |
1037 | u8 *neigh_addr; | |
1038 | u8 tq_avg; | |
fc957275 | 1039 | |
39c75a51 | 1040 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1041 | "update_originator(): Searching and updating originator entry of received packet\n"); |
fc957275 ML |
1042 | |
1043 | rcu_read_lock(); | |
b67bfe0d | 1044 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 1045 | &orig_node->neigh_list, list) { |
1eda58bf SE |
1046 | neigh_addr = tmp_neigh_node->addr; |
1047 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && | |
1048 | tmp_neigh_node->if_incoming == if_incoming && | |
77ae32e8 | 1049 | kref_get_unless_zero(&tmp_neigh_node->refcount)) { |
38dc40ef | 1050 | if (WARN(neigh_node, "too many matching neigh_nodes")) |
25bb2509 | 1051 | batadv_neigh_node_put(neigh_node); |
fc957275 ML |
1052 | neigh_node = tmp_neigh_node; |
1053 | continue; | |
1054 | } | |
1055 | ||
7c24bbbe | 1056 | if (dup_status != BATADV_NO_DUP) |
fc957275 ML |
1057 | continue; |
1058 | ||
89652331 SW |
1059 | /* only update the entry for this outgoing interface */ |
1060 | neigh_ifinfo = batadv_neigh_ifinfo_get(tmp_neigh_node, | |
1061 | if_outgoing); | |
1062 | if (!neigh_ifinfo) | |
1063 | continue; | |
1064 | ||
1065 | spin_lock_bh(&tmp_neigh_node->ifinfo_lock); | |
1066 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
1067 | &neigh_ifinfo->bat_iv.tq_index, 0); | |
1068 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); | |
1069 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
1070 | spin_unlock_bh(&tmp_neigh_node->ifinfo_lock); | |
1071 | ||
044fa3ae | 1072 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 | 1073 | neigh_ifinfo = NULL; |
fc957275 ML |
1074 | } |
1075 | ||
1076 | if (!neigh_node) { | |
56303d34 | 1077 | struct batadv_orig_node *orig_tmp; |
fc957275 | 1078 | |
bbad0a5e | 1079 | orig_tmp = batadv_iv_ogm_orig_get(bat_priv, ethhdr->h_source); |
fc957275 ML |
1080 | if (!orig_tmp) |
1081 | goto unlock; | |
1082 | ||
fe8bc396 SE |
1083 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
1084 | ethhdr->h_source, | |
863dd7a8 | 1085 | orig_node, orig_tmp); |
fc957275 | 1086 | |
5d967310 | 1087 | batadv_orig_node_put(orig_tmp); |
fc957275 ML |
1088 | if (!neigh_node) |
1089 | goto unlock; | |
23badd6d | 1090 | } else { |
39c75a51 | 1091 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1092 | "Updating existing last-hop neighbor of originator\n"); |
23badd6d | 1093 | } |
fc957275 ML |
1094 | |
1095 | rcu_read_unlock(); | |
89652331 SW |
1096 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
1097 | if (!neigh_ifinfo) | |
1098 | goto out; | |
fc957275 | 1099 | |
d7b2a97e | 1100 | neigh_node->last_seen = jiffies; |
fc957275 | 1101 | |
89652331 SW |
1102 | spin_lock_bh(&neigh_node->ifinfo_lock); |
1103 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
1104 | &neigh_ifinfo->bat_iv.tq_index, | |
96412690 | 1105 | batadv_ogm_packet->tq); |
89652331 SW |
1106 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); |
1107 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
1108 | spin_unlock_bh(&neigh_node->ifinfo_lock); | |
fc957275 | 1109 | |
7c24bbbe | 1110 | if (dup_status == BATADV_NO_DUP) { |
7351a482 | 1111 | orig_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
89652331 | 1112 | neigh_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
fc957275 ML |
1113 | } |
1114 | ||
fc957275 | 1115 | /* if this neighbor already is our next hop there is nothing |
9cfc7bd6 SE |
1116 | * to change |
1117 | */ | |
7351a482 | 1118 | router = batadv_orig_router_get(orig_node, if_outgoing); |
fc957275 | 1119 | if (router == neigh_node) |
e1bf0c14 | 1120 | goto out; |
fc957275 | 1121 | |
89652331 SW |
1122 | if (router) { |
1123 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
1124 | if (!router_ifinfo) | |
1125 | goto out; | |
1126 | ||
1127 | /* if this neighbor does not offer a better TQ we won't | |
1128 | * consider it | |
1129 | */ | |
1130 | if (router_ifinfo->bat_iv.tq_avg > neigh_ifinfo->bat_iv.tq_avg) | |
1131 | goto out; | |
1132 | } | |
fc957275 ML |
1133 | |
1134 | /* if the TQ is the same and the link not more symmetric we | |
9cfc7bd6 SE |
1135 | * won't consider it either |
1136 | */ | |
89652331 | 1137 | if (router_ifinfo && |
01b97a3e | 1138 | neigh_ifinfo->bat_iv.tq_avg == router_ifinfo->bat_iv.tq_avg) { |
fc957275 | 1139 | orig_node_tmp = router->orig_node; |
bbad0a5e | 1140 | spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
7caf69fb | 1141 | if_num = router->if_incoming->if_num; |
bbad0a5e AQ |
1142 | sum_orig = orig_node_tmp->bat_iv.bcast_own_sum[if_num]; |
1143 | spin_unlock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); | |
fc957275 ML |
1144 | |
1145 | orig_node_tmp = neigh_node->orig_node; | |
bbad0a5e | 1146 | spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
7caf69fb | 1147 | if_num = neigh_node->if_incoming->if_num; |
bbad0a5e AQ |
1148 | sum_neigh = orig_node_tmp->bat_iv.bcast_own_sum[if_num]; |
1149 | spin_unlock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); | |
fc957275 | 1150 | |
bbb1f90e | 1151 | if (sum_orig >= sum_neigh) |
e1bf0c14 | 1152 | goto out; |
fc957275 ML |
1153 | } |
1154 | ||
7351a482 | 1155 | batadv_update_route(bat_priv, orig_node, if_outgoing, neigh_node); |
fc957275 ML |
1156 | goto out; |
1157 | ||
1158 | unlock: | |
1159 | rcu_read_unlock(); | |
1160 | out: | |
1161 | if (neigh_node) | |
25bb2509 | 1162 | batadv_neigh_node_put(neigh_node); |
fc957275 | 1163 | if (router) |
25bb2509 | 1164 | batadv_neigh_node_put(router); |
89652331 | 1165 | if (neigh_ifinfo) |
044fa3ae | 1166 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 | 1167 | if (router_ifinfo) |
044fa3ae | 1168 | batadv_neigh_ifinfo_put(router_ifinfo); |
fc957275 ML |
1169 | } |
1170 | ||
89652331 SW |
1171 | /** |
1172 | * batadv_iv_ogm_calc_tq - calculate tq for current received ogm packet | |
1173 | * @orig_node: the orig node who originally emitted the ogm packet | |
1174 | * @orig_neigh_node: the orig node struct of the neighbor who sent the packet | |
1175 | * @batadv_ogm_packet: the ogm packet | |
1176 | * @if_incoming: interface where the packet was received | |
1177 | * @if_outgoing: interface for which the retransmission should be considered | |
1178 | * | |
4b426b10 | 1179 | * Return: true if the link can be considered bidirectional, false otherwise |
89652331 | 1180 | */ |
4b426b10 SE |
1181 | static bool batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, |
1182 | struct batadv_orig_node *orig_neigh_node, | |
1183 | struct batadv_ogm_packet *batadv_ogm_packet, | |
1184 | struct batadv_hard_iface *if_incoming, | |
1185 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1186 | { |
56303d34 SE |
1187 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1188 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node; | |
89652331 | 1189 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
6b5e971a SE |
1190 | u8 total_count; |
1191 | u8 orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own; | |
42d0b044 | 1192 | unsigned int neigh_rq_inv_cube, neigh_rq_max_cube; |
d285f52c SE |
1193 | int if_num; |
1194 | unsigned int tq_asym_penalty, inv_asym_penalty; | |
42d0b044 | 1195 | unsigned int combined_tq; |
d285f52c | 1196 | unsigned int tq_iface_penalty; |
4b426b10 | 1197 | bool ret = false; |
fc957275 ML |
1198 | |
1199 | /* find corresponding one hop neighbor */ | |
1200 | rcu_read_lock(); | |
b67bfe0d | 1201 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 1202 | &orig_neigh_node->neigh_list, list) { |
1eda58bf SE |
1203 | if (!batadv_compare_eth(tmp_neigh_node->addr, |
1204 | orig_neigh_node->orig)) | |
fc957275 ML |
1205 | continue; |
1206 | ||
1207 | if (tmp_neigh_node->if_incoming != if_incoming) | |
1208 | continue; | |
1209 | ||
77ae32e8 | 1210 | if (!kref_get_unless_zero(&tmp_neigh_node->refcount)) |
fc957275 ML |
1211 | continue; |
1212 | ||
1213 | neigh_node = tmp_neigh_node; | |
1214 | break; | |
1215 | } | |
1216 | rcu_read_unlock(); | |
1217 | ||
1218 | if (!neigh_node) | |
fe8bc396 SE |
1219 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
1220 | orig_neigh_node->orig, | |
1221 | orig_neigh_node, | |
863dd7a8 | 1222 | orig_neigh_node); |
fc957275 ML |
1223 | |
1224 | if (!neigh_node) | |
1225 | goto out; | |
1226 | ||
d7b2a97e | 1227 | /* if orig_node is direct neighbor update neigh_node last_seen */ |
fc957275 | 1228 | if (orig_node == orig_neigh_node) |
d7b2a97e | 1229 | neigh_node->last_seen = jiffies; |
fc957275 | 1230 | |
d7b2a97e | 1231 | orig_node->last_seen = jiffies; |
fc957275 ML |
1232 | |
1233 | /* find packet count of corresponding one hop neighbor */ | |
bbad0a5e AQ |
1234 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
1235 | if_num = if_incoming->if_num; | |
1236 | orig_eq_count = orig_neigh_node->bat_iv.bcast_own_sum[if_num]; | |
89652331 SW |
1237 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
1238 | if (neigh_ifinfo) { | |
1239 | neigh_rq_count = neigh_ifinfo->bat_iv.real_packet_count; | |
044fa3ae | 1240 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 SW |
1241 | } else { |
1242 | neigh_rq_count = 0; | |
1243 | } | |
bbad0a5e | 1244 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
fc957275 ML |
1245 | |
1246 | /* pay attention to not get a value bigger than 100 % */ | |
c67893d1 SE |
1247 | if (orig_eq_count > neigh_rq_count) |
1248 | total_count = neigh_rq_count; | |
1249 | else | |
1250 | total_count = orig_eq_count; | |
fc957275 | 1251 | |
9cfc7bd6 SE |
1252 | /* if we have too few packets (too less data) we set tq_own to zero |
1253 | * if we receive too few packets it is not considered bidirectional | |
1254 | */ | |
42d0b044 SE |
1255 | if (total_count < BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM || |
1256 | neigh_rq_count < BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM) | |
fc957275 ML |
1257 | tq_own = 0; |
1258 | else | |
1259 | /* neigh_node->real_packet_count is never zero as we | |
1260 | * only purge old information when getting new | |
9cfc7bd6 SE |
1261 | * information |
1262 | */ | |
42d0b044 | 1263 | tq_own = (BATADV_TQ_MAX_VALUE * total_count) / neigh_rq_count; |
fc957275 | 1264 | |
21a1236b | 1265 | /* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does |
fc957275 ML |
1266 | * affect the nearly-symmetric links only a little, but |
1267 | * punishes asymmetric links more. This will give a value | |
1268 | * between 0 and TQ_MAX_VALUE | |
1269 | */ | |
42d0b044 SE |
1270 | neigh_rq_inv = BATADV_TQ_LOCAL_WINDOW_SIZE - neigh_rq_count; |
1271 | neigh_rq_inv_cube = neigh_rq_inv * neigh_rq_inv * neigh_rq_inv; | |
1272 | neigh_rq_max_cube = BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1273 | BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1274 | BATADV_TQ_LOCAL_WINDOW_SIZE; | |
1275 | inv_asym_penalty = BATADV_TQ_MAX_VALUE * neigh_rq_inv_cube; | |
1276 | inv_asym_penalty /= neigh_rq_max_cube; | |
1277 | tq_asym_penalty = BATADV_TQ_MAX_VALUE - inv_asym_penalty; | |
1278 | ||
c0398768 SW |
1279 | /* penalize if the OGM is forwarded on the same interface. WiFi |
1280 | * interfaces and other half duplex devices suffer from throughput | |
1281 | * drops as they can't send and receive at the same time. | |
1282 | */ | |
1283 | tq_iface_penalty = BATADV_TQ_MAX_VALUE; | |
1284 | if (if_outgoing && (if_incoming == if_outgoing) && | |
1285 | batadv_is_wifi_netdev(if_outgoing->net_dev)) | |
1286 | tq_iface_penalty = batadv_hop_penalty(BATADV_TQ_MAX_VALUE, | |
1287 | bat_priv); | |
1288 | ||
1289 | combined_tq = batadv_ogm_packet->tq * | |
1290 | tq_own * | |
1291 | tq_asym_penalty * | |
1292 | tq_iface_penalty; | |
1293 | combined_tq /= BATADV_TQ_MAX_VALUE * | |
1294 | BATADV_TQ_MAX_VALUE * | |
1295 | BATADV_TQ_MAX_VALUE; | |
96412690 | 1296 | batadv_ogm_packet->tq = combined_tq; |
fc957275 | 1297 | |
39c75a51 | 1298 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
c0398768 | 1299 | "bidirectional: orig = %-15pM neigh = %-15pM => own_bcast = %2i, real recv = %2i, local tq: %3i, asym_penalty: %3i, iface_penalty: %3i, total tq: %3i, if_incoming = %s, if_outgoing = %s\n", |
1eda58bf | 1300 | orig_node->orig, orig_neigh_node->orig, total_count, |
c0398768 SW |
1301 | neigh_rq_count, tq_own, tq_asym_penalty, tq_iface_penalty, |
1302 | batadv_ogm_packet->tq, if_incoming->net_dev->name, | |
1303 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT"); | |
fc957275 ML |
1304 | |
1305 | /* if link has the minimum required transmission quality | |
9cfc7bd6 SE |
1306 | * consider it bidirectional |
1307 | */ | |
96412690 | 1308 | if (batadv_ogm_packet->tq >= BATADV_TQ_TOTAL_BIDRECT_LIMIT) |
4b426b10 | 1309 | ret = true; |
fc957275 ML |
1310 | |
1311 | out: | |
1312 | if (neigh_node) | |
25bb2509 | 1313 | batadv_neigh_node_put(neigh_node); |
fc957275 ML |
1314 | return ret; |
1315 | } | |
1316 | ||
7c24bbbe SW |
1317 | /** |
1318 | * batadv_iv_ogm_update_seqnos - process a batman packet for all interfaces, | |
1319 | * adjust the sequence number and find out whether it is a duplicate | |
1320 | * @ethhdr: ethernet header of the packet | |
1321 | * @batadv_ogm_packet: OGM packet to be considered | |
1322 | * @if_incoming: interface on which the OGM packet was received | |
89652331 | 1323 | * @if_outgoing: interface for which the retransmission should be considered |
7c24bbbe | 1324 | * |
62fe710f | 1325 | * Return: duplicate status as enum batadv_dup_status |
fc957275 | 1326 | */ |
7c24bbbe | 1327 | static enum batadv_dup_status |
fe8bc396 | 1328 | batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, |
96412690 | 1329 | const struct batadv_ogm_packet *batadv_ogm_packet, |
89652331 SW |
1330 | const struct batadv_hard_iface *if_incoming, |
1331 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1332 | { |
56303d34 SE |
1333 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1334 | struct batadv_orig_node *orig_node; | |
7351a482 | 1335 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; |
89652331 SW |
1336 | struct batadv_neigh_node *neigh_node; |
1337 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
4b426b10 | 1338 | bool is_dup; |
6b5e971a | 1339 | s32 seq_diff; |
4b426b10 | 1340 | bool need_update = false; |
7c24bbbe SW |
1341 | int set_mark; |
1342 | enum batadv_dup_status ret = BATADV_NO_DUP; | |
6b5e971a SE |
1343 | u32 seqno = ntohl(batadv_ogm_packet->seqno); |
1344 | u8 *neigh_addr; | |
1345 | u8 packet_count; | |
0538f759 | 1346 | unsigned long *bitmap; |
fc957275 | 1347 | |
bbad0a5e | 1348 | orig_node = batadv_iv_ogm_orig_get(bat_priv, batadv_ogm_packet->orig); |
fc957275 | 1349 | if (!orig_node) |
7c24bbbe | 1350 | return BATADV_NO_DUP; |
fc957275 | 1351 | |
7351a482 SW |
1352 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1353 | if (WARN_ON(!orig_ifinfo)) { | |
5d967310 | 1354 | batadv_orig_node_put(orig_node); |
7351a482 SW |
1355 | return 0; |
1356 | } | |
1357 | ||
bbad0a5e | 1358 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
7351a482 | 1359 | seq_diff = seqno - orig_ifinfo->last_real_seqno; |
fc957275 ML |
1360 | |
1361 | /* signalize caller that the packet is to be dropped. */ | |
1e5cc266 | 1362 | if (!hlist_empty(&orig_node->neigh_list) && |
30d3c511 | 1363 | batadv_window_protected(bat_priv, seq_diff, |
81f02683 SW |
1364 | BATADV_TQ_LOCAL_WINDOW_SIZE, |
1365 | &orig_ifinfo->batman_seqno_reset, NULL)) { | |
7c24bbbe | 1366 | ret = BATADV_PROTECTED; |
fc957275 | 1367 | goto out; |
7c24bbbe | 1368 | } |
fc957275 ML |
1369 | |
1370 | rcu_read_lock(); | |
89652331 SW |
1371 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { |
1372 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, | |
1373 | if_outgoing); | |
1374 | if (!neigh_ifinfo) | |
1375 | continue; | |
1376 | ||
1377 | neigh_addr = neigh_node->addr; | |
1378 | is_dup = batadv_test_bit(neigh_ifinfo->bat_iv.real_bits, | |
7351a482 | 1379 | orig_ifinfo->last_real_seqno, |
7c24bbbe SW |
1380 | seqno); |
1381 | ||
1eda58bf | 1382 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && |
89652331 | 1383 | neigh_node->if_incoming == if_incoming) { |
fc957275 | 1384 | set_mark = 1; |
7c24bbbe SW |
1385 | if (is_dup) |
1386 | ret = BATADV_NEIGH_DUP; | |
1387 | } else { | |
fc957275 | 1388 | set_mark = 0; |
7c24bbbe SW |
1389 | if (is_dup && (ret != BATADV_NEIGH_DUP)) |
1390 | ret = BATADV_ORIG_DUP; | |
1391 | } | |
fc957275 ML |
1392 | |
1393 | /* if the window moved, set the update flag. */ | |
89652331 | 1394 | bitmap = neigh_ifinfo->bat_iv.real_bits; |
0538f759 | 1395 | need_update |= batadv_bit_get_packet(bat_priv, bitmap, |
0f5f9322 | 1396 | seq_diff, set_mark); |
fc957275 | 1397 | |
89652331 | 1398 | packet_count = bitmap_weight(bitmap, |
bbb1f90e | 1399 | BATADV_TQ_LOCAL_WINDOW_SIZE); |
89652331 | 1400 | neigh_ifinfo->bat_iv.real_packet_count = packet_count; |
044fa3ae | 1401 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
fc957275 ML |
1402 | } |
1403 | rcu_read_unlock(); | |
1404 | ||
1405 | if (need_update) { | |
39c75a51 | 1406 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
7351a482 SW |
1407 | "%s updating last_seqno: old %u, new %u\n", |
1408 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT", | |
1409 | orig_ifinfo->last_real_seqno, seqno); | |
1410 | orig_ifinfo->last_real_seqno = seqno; | |
fc957275 ML |
1411 | } |
1412 | ||
fc957275 | 1413 | out: |
bbad0a5e | 1414 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
5d967310 | 1415 | batadv_orig_node_put(orig_node); |
35f94779 | 1416 | batadv_orig_ifinfo_put(orig_ifinfo); |
fc957275 ML |
1417 | return ret; |
1418 | } | |
1419 | ||
7351a482 SW |
1420 | /** |
1421 | * batadv_iv_ogm_process_per_outif - process a batman iv OGM for an outgoing if | |
1422 | * @skb: the skb containing the OGM | |
95298a91 | 1423 | * @ogm_offset: offset from skb->data to start of ogm header |
7351a482 SW |
1424 | * @orig_node: the (cached) orig node for the originator of this OGM |
1425 | * @if_incoming: the interface where this packet was received | |
1426 | * @if_outgoing: the interface for which the packet should be considered | |
1427 | */ | |
1428 | static void | |
1429 | batadv_iv_ogm_process_per_outif(const struct sk_buff *skb, int ogm_offset, | |
1430 | struct batadv_orig_node *orig_node, | |
1431 | struct batadv_hard_iface *if_incoming, | |
1432 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1433 | { |
56303d34 | 1434 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
4ff1e2a7 | 1435 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
4f248cff SE |
1436 | struct batadv_neigh_node *router = NULL; |
1437 | struct batadv_neigh_node *router_router = NULL; | |
7351a482 SW |
1438 | struct batadv_orig_node *orig_neigh_node; |
1439 | struct batadv_orig_ifinfo *orig_ifinfo; | |
56303d34 | 1440 | struct batadv_neigh_node *orig_neigh_router = NULL; |
89652331 | 1441 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; |
7351a482 | 1442 | struct batadv_ogm_packet *ogm_packet; |
7c24bbbe | 1443 | enum batadv_dup_status dup_status; |
7351a482 SW |
1444 | bool is_from_best_next_hop = false; |
1445 | bool is_single_hop_neigh = false; | |
1446 | bool sameseq, similar_ttl; | |
1447 | struct sk_buff *skb_priv; | |
1448 | struct ethhdr *ethhdr; | |
6b5e971a | 1449 | u8 *prev_sender; |
4b426b10 | 1450 | bool is_bidirect; |
fc957275 | 1451 | |
7351a482 SW |
1452 | /* create a private copy of the skb, as some functions change tq value |
1453 | * and/or flags. | |
fc957275 | 1454 | */ |
7351a482 SW |
1455 | skb_priv = skb_copy(skb, GFP_ATOMIC); |
1456 | if (!skb_priv) | |
fc957275 ML |
1457 | return; |
1458 | ||
7351a482 SW |
1459 | ethhdr = eth_hdr(skb_priv); |
1460 | ogm_packet = (struct batadv_ogm_packet *)(skb_priv->data + ogm_offset); | |
fc957275 | 1461 | |
7351a482 SW |
1462 | dup_status = batadv_iv_ogm_update_seqnos(ethhdr, ogm_packet, |
1463 | if_incoming, if_outgoing); | |
1464 | if (batadv_compare_eth(ethhdr->h_source, ogm_packet->orig)) | |
75cd33f8 | 1465 | is_single_hop_neigh = true; |
fc957275 | 1466 | |
7c24bbbe | 1467 | if (dup_status == BATADV_PROTECTED) { |
39c75a51 | 1468 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1469 | "Drop packet: packet within seqno protection time (sender: %pM)\n", |
1470 | ethhdr->h_source); | |
fc957275 ML |
1471 | goto out; |
1472 | } | |
1473 | ||
7351a482 | 1474 | if (ogm_packet->tq == 0) { |
39c75a51 | 1475 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1476 | "Drop packet: originator packet with tq equal 0\n"); |
fc957275 ML |
1477 | goto out; |
1478 | } | |
1479 | ||
4ff1e2a7 ML |
1480 | if (is_single_hop_neigh) { |
1481 | hardif_neigh = batadv_hardif_neigh_get(if_incoming, | |
1482 | ethhdr->h_source); | |
1483 | if (hardif_neigh) | |
1484 | hardif_neigh->last_seen = jiffies; | |
1485 | } | |
1486 | ||
7351a482 | 1487 | router = batadv_orig_router_get(orig_node, if_outgoing); |
0538f759 | 1488 | if (router) { |
7351a482 SW |
1489 | router_router = batadv_orig_router_get(router->orig_node, |
1490 | if_outgoing); | |
1491 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
0538f759 | 1492 | } |
fc957275 | 1493 | |
7351a482 | 1494 | if ((router_ifinfo && router_ifinfo->bat_iv.tq_avg != 0) && |
1eda58bf | 1495 | (batadv_compare_eth(router->addr, ethhdr->h_source))) |
13b2541b ML |
1496 | is_from_best_next_hop = true; |
1497 | ||
7351a482 | 1498 | prev_sender = ogm_packet->prev_sender; |
fc957275 ML |
1499 | /* avoid temporary routing loops */ |
1500 | if (router && router_router && | |
1eda58bf | 1501 | (batadv_compare_eth(router->addr, prev_sender)) && |
7351a482 | 1502 | !(batadv_compare_eth(ogm_packet->orig, prev_sender)) && |
1eda58bf | 1503 | (batadv_compare_eth(router->addr, router_router->addr))) { |
39c75a51 | 1504 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1505 | "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n", |
1506 | ethhdr->h_source); | |
fc957275 ML |
1507 | goto out; |
1508 | } | |
1509 | ||
7351a482 SW |
1510 | if (if_outgoing == BATADV_IF_DEFAULT) |
1511 | batadv_tvlv_ogm_receive(bat_priv, ogm_packet, orig_node); | |
ef261577 | 1512 | |
fc957275 | 1513 | /* if sender is a direct neighbor the sender mac equals |
9cfc7bd6 SE |
1514 | * originator mac |
1515 | */ | |
c67893d1 SE |
1516 | if (is_single_hop_neigh) |
1517 | orig_neigh_node = orig_node; | |
1518 | else | |
bbad0a5e AQ |
1519 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, |
1520 | ethhdr->h_source); | |
c67893d1 | 1521 | |
fc957275 ML |
1522 | if (!orig_neigh_node) |
1523 | goto out; | |
1524 | ||
d56b1705 MH |
1525 | /* Update nc_nodes of the originator */ |
1526 | batadv_nc_update_nc_node(bat_priv, orig_node, orig_neigh_node, | |
7351a482 | 1527 | ogm_packet, is_single_hop_neigh); |
d56b1705 | 1528 | |
7351a482 SW |
1529 | orig_neigh_router = batadv_orig_router_get(orig_neigh_node, |
1530 | if_outgoing); | |
fc957275 ML |
1531 | |
1532 | /* drop packet if sender is not a direct neighbor and if we | |
9cfc7bd6 SE |
1533 | * don't route towards it |
1534 | */ | |
fc957275 | 1535 | if (!is_single_hop_neigh && (!orig_neigh_router)) { |
39c75a51 | 1536 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1537 | "Drop packet: OGM via unknown neighbor!\n"); |
fc957275 ML |
1538 | goto out_neigh; |
1539 | } | |
1540 | ||
fe8bc396 | 1541 | is_bidirect = batadv_iv_ogm_calc_tq(orig_node, orig_neigh_node, |
7351a482 SW |
1542 | ogm_packet, if_incoming, |
1543 | if_outgoing); | |
fc957275 | 1544 | |
fc957275 | 1545 | /* update ranking if it is not a duplicate or has the same |
9cfc7bd6 SE |
1546 | * seqno and similar ttl as the non-duplicate |
1547 | */ | |
7351a482 SW |
1548 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1549 | if (!orig_ifinfo) | |
1550 | goto out_neigh; | |
1551 | ||
1552 | sameseq = orig_ifinfo->last_real_seqno == ntohl(ogm_packet->seqno); | |
1553 | similar_ttl = (orig_ifinfo->last_ttl - 3) <= ogm_packet->ttl; | |
1554 | ||
7c24bbbe | 1555 | if (is_bidirect && ((dup_status == BATADV_NO_DUP) || |
7351a482 SW |
1556 | (sameseq && similar_ttl))) { |
1557 | batadv_iv_ogm_orig_update(bat_priv, orig_node, | |
1558 | orig_ifinfo, ethhdr, | |
1559 | ogm_packet, if_incoming, | |
1560 | if_outgoing, dup_status); | |
1561 | } | |
35f94779 | 1562 | batadv_orig_ifinfo_put(orig_ifinfo); |
fc957275 | 1563 | |
ef0a937f SW |
1564 | /* only forward for specific interface, not for the default one. */ |
1565 | if (if_outgoing == BATADV_IF_DEFAULT) | |
1566 | goto out_neigh; | |
1567 | ||
fc957275 ML |
1568 | /* is single hop (direct) neighbor */ |
1569 | if (is_single_hop_neigh) { | |
7351a482 SW |
1570 | /* OGMs from secondary interfaces should only scheduled once |
1571 | * per interface where it has been received, not multiple times | |
1572 | */ | |
1573 | if ((ogm_packet->ttl <= 2) && | |
1574 | (if_incoming != if_outgoing)) { | |
1575 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1576 | "Drop packet: OGM from secondary interface and wrong outgoing interface\n"); | |
1577 | goto out_neigh; | |
1578 | } | |
fc957275 | 1579 | /* mark direct link on incoming interface */ |
7351a482 | 1580 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1581 | is_single_hop_neigh, |
ef0a937f SW |
1582 | is_from_best_next_hop, if_incoming, |
1583 | if_outgoing); | |
fc957275 | 1584 | |
39c75a51 | 1585 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1586 | "Forwarding packet: rebroadcast neighbor packet with direct link flag\n"); |
fc957275 ML |
1587 | goto out_neigh; |
1588 | } | |
1589 | ||
1590 | /* multihop originator */ | |
fe8bc396 | 1591 | if (!is_bidirect) { |
39c75a51 | 1592 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1593 | "Drop packet: not received via bidirectional link\n"); |
fc957275 ML |
1594 | goto out_neigh; |
1595 | } | |
1596 | ||
7c24bbbe | 1597 | if (dup_status == BATADV_NEIGH_DUP) { |
39c75a51 | 1598 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1599 | "Drop packet: duplicate packet received\n"); |
fc957275 ML |
1600 | goto out_neigh; |
1601 | } | |
1602 | ||
39c75a51 | 1603 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1604 | "Forwarding packet: rebroadcast originator packet\n"); |
7351a482 | 1605 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1606 | is_single_hop_neigh, is_from_best_next_hop, |
ef0a937f | 1607 | if_incoming, if_outgoing); |
fc957275 ML |
1608 | |
1609 | out_neigh: | |
1610 | if ((orig_neigh_node) && (!is_single_hop_neigh)) | |
5d967310 | 1611 | batadv_orig_node_put(orig_neigh_node); |
fc957275 | 1612 | out: |
c1e517fb | 1613 | if (router_ifinfo) |
044fa3ae | 1614 | batadv_neigh_ifinfo_put(router_ifinfo); |
fc957275 | 1615 | if (router) |
25bb2509 | 1616 | batadv_neigh_node_put(router); |
fc957275 | 1617 | if (router_router) |
25bb2509 | 1618 | batadv_neigh_node_put(router_router); |
fc957275 | 1619 | if (orig_neigh_router) |
25bb2509 | 1620 | batadv_neigh_node_put(orig_neigh_router); |
4ff1e2a7 | 1621 | if (hardif_neigh) |
accadc35 | 1622 | batadv_hardif_neigh_put(hardif_neigh); |
fc957275 | 1623 | |
7351a482 SW |
1624 | kfree_skb(skb_priv); |
1625 | } | |
1626 | ||
1627 | /** | |
1628 | * batadv_iv_ogm_process - process an incoming batman iv OGM | |
1629 | * @skb: the skb containing the OGM | |
1630 | * @ogm_offset: offset to the OGM which should be processed (for aggregates) | |
1631 | * @if_incoming: the interface where this packet was receved | |
1632 | */ | |
1633 | static void batadv_iv_ogm_process(const struct sk_buff *skb, int ogm_offset, | |
1634 | struct batadv_hard_iface *if_incoming) | |
1635 | { | |
1636 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); | |
1637 | struct batadv_orig_node *orig_neigh_node, *orig_node; | |
1638 | struct batadv_hard_iface *hard_iface; | |
1639 | struct batadv_ogm_packet *ogm_packet; | |
6b5e971a | 1640 | u32 if_incoming_seqno; |
7351a482 SW |
1641 | bool has_directlink_flag; |
1642 | struct ethhdr *ethhdr; | |
1643 | bool is_my_oldorig = false; | |
1644 | bool is_my_addr = false; | |
1645 | bool is_my_orig = false; | |
1646 | ||
1647 | ogm_packet = (struct batadv_ogm_packet *)(skb->data + ogm_offset); | |
1648 | ethhdr = eth_hdr(skb); | |
1649 | ||
1650 | /* Silently drop when the batman packet is actually not a | |
1651 | * correct packet. | |
1652 | * | |
1653 | * This might happen if a packet is padded (e.g. Ethernet has a | |
1654 | * minimum frame length of 64 byte) and the aggregation interprets | |
1655 | * it as an additional length. | |
1656 | * | |
1657 | * TODO: A more sane solution would be to have a bit in the | |
1658 | * batadv_ogm_packet to detect whether the packet is the last | |
1659 | * packet in an aggregation. Here we expect that the padding | |
1660 | * is always zero (or not 0x01) | |
1661 | */ | |
1662 | if (ogm_packet->packet_type != BATADV_IV_OGM) | |
1663 | return; | |
1664 | ||
1665 | /* could be changed by schedule_own_packet() */ | |
1666 | if_incoming_seqno = atomic_read(&if_incoming->bat_iv.ogm_seqno); | |
1667 | ||
1668 | if (ogm_packet->flags & BATADV_DIRECTLINK) | |
1669 | has_directlink_flag = true; | |
1670 | else | |
1671 | has_directlink_flag = false; | |
1672 | ||
1673 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1674 | "Received BATMAN packet via NB: %pM, IF: %s [%pM] (from OG: %pM, via prev OG: %pM, seqno %u, tq %d, TTL %d, V %d, IDF %d)\n", | |
1675 | ethhdr->h_source, if_incoming->net_dev->name, | |
1676 | if_incoming->net_dev->dev_addr, ogm_packet->orig, | |
1677 | ogm_packet->prev_sender, ntohl(ogm_packet->seqno), | |
1678 | ogm_packet->tq, ogm_packet->ttl, | |
1679 | ogm_packet->version, has_directlink_flag); | |
1680 | ||
1681 | rcu_read_lock(); | |
1682 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1683 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1684 | continue; | |
1685 | ||
1686 | if (hard_iface->soft_iface != if_incoming->soft_iface) | |
1687 | continue; | |
1688 | ||
1689 | if (batadv_compare_eth(ethhdr->h_source, | |
1690 | hard_iface->net_dev->dev_addr)) | |
1691 | is_my_addr = true; | |
1692 | ||
1693 | if (batadv_compare_eth(ogm_packet->orig, | |
1694 | hard_iface->net_dev->dev_addr)) | |
1695 | is_my_orig = true; | |
1696 | ||
1697 | if (batadv_compare_eth(ogm_packet->prev_sender, | |
1698 | hard_iface->net_dev->dev_addr)) | |
1699 | is_my_oldorig = true; | |
1700 | } | |
1701 | rcu_read_unlock(); | |
1702 | ||
1703 | if (is_my_addr) { | |
1704 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1705 | "Drop packet: received my own broadcast (sender: %pM)\n", | |
1706 | ethhdr->h_source); | |
1707 | return; | |
1708 | } | |
1709 | ||
1710 | if (is_my_orig) { | |
1711 | unsigned long *word; | |
1712 | int offset; | |
6b5e971a SE |
1713 | s32 bit_pos; |
1714 | s16 if_num; | |
1715 | u8 *weight; | |
7351a482 SW |
1716 | |
1717 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, | |
1718 | ethhdr->h_source); | |
1719 | if (!orig_neigh_node) | |
1720 | return; | |
1721 | ||
1722 | /* neighbor has to indicate direct link and it has to | |
1723 | * come via the corresponding interface | |
1724 | * save packet seqno for bidirectional check | |
1725 | */ | |
1726 | if (has_directlink_flag && | |
1727 | batadv_compare_eth(if_incoming->net_dev->dev_addr, | |
1728 | ogm_packet->orig)) { | |
1729 | if_num = if_incoming->if_num; | |
1730 | offset = if_num * BATADV_NUM_WORDS; | |
1731 | ||
1732 | spin_lock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); | |
32db6aaa | 1733 | word = &orig_neigh_node->bat_iv.bcast_own[offset]; |
7351a482 SW |
1734 | bit_pos = if_incoming_seqno - 2; |
1735 | bit_pos -= ntohl(ogm_packet->seqno); | |
1736 | batadv_set_bit(word, bit_pos); | |
1737 | weight = &orig_neigh_node->bat_iv.bcast_own_sum[if_num]; | |
1738 | *weight = bitmap_weight(word, | |
1739 | BATADV_TQ_LOCAL_WINDOW_SIZE); | |
1740 | spin_unlock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); | |
1741 | } | |
1742 | ||
1743 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1744 | "Drop packet: originator packet from myself (via neighbor)\n"); | |
5d967310 | 1745 | batadv_orig_node_put(orig_neigh_node); |
7351a482 SW |
1746 | return; |
1747 | } | |
1748 | ||
1749 | if (is_my_oldorig) { | |
1750 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1751 | "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n", | |
1752 | ethhdr->h_source); | |
1753 | return; | |
1754 | } | |
1755 | ||
1756 | if (ogm_packet->flags & BATADV_NOT_BEST_NEXT_HOP) { | |
1757 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1758 | "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n", | |
1759 | ethhdr->h_source); | |
1760 | return; | |
1761 | } | |
1762 | ||
1763 | orig_node = batadv_iv_ogm_orig_get(bat_priv, ogm_packet->orig); | |
1764 | if (!orig_node) | |
1765 | return; | |
1766 | ||
1767 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, | |
1768 | if_incoming, BATADV_IF_DEFAULT); | |
1769 | ||
1770 | rcu_read_lock(); | |
1771 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1772 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1773 | continue; | |
1774 | ||
1775 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
1776 | continue; | |
1777 | ||
27353446 SE |
1778 | if (!kref_get_unless_zero(&hard_iface->refcount)) |
1779 | continue; | |
1780 | ||
7351a482 SW |
1781 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, |
1782 | if_incoming, hard_iface); | |
27353446 SE |
1783 | |
1784 | batadv_hardif_put(hard_iface); | |
7351a482 SW |
1785 | } |
1786 | rcu_read_unlock(); | |
1787 | ||
5d967310 | 1788 | batadv_orig_node_put(orig_node); |
fc957275 ML |
1789 | } |
1790 | ||
f0d97253 AQ |
1791 | static void batadv_iv_send_outstanding_bat_ogm_packet(struct work_struct *work) |
1792 | { | |
1793 | struct delayed_work *delayed_work; | |
1794 | struct batadv_forw_packet *forw_packet; | |
1795 | struct batadv_priv *bat_priv; | |
1796 | ||
1797 | delayed_work = to_delayed_work(work); | |
1798 | forw_packet = container_of(delayed_work, struct batadv_forw_packet, | |
1799 | delayed_work); | |
1800 | bat_priv = netdev_priv(forw_packet->if_incoming->soft_iface); | |
1801 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
1802 | hlist_del(&forw_packet->list); | |
1803 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
1804 | ||
1805 | if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) | |
1806 | goto out; | |
1807 | ||
1808 | batadv_iv_ogm_emit(forw_packet); | |
1809 | ||
1810 | /* we have to have at least one packet in the queue to determine the | |
1811 | * queues wake up time unless we are shutting down. | |
1812 | * | |
1813 | * only re-schedule if this is the "original" copy, e.g. the OGM of the | |
1814 | * primary interface should only be rescheduled once per period, but | |
1815 | * this function will be called for the forw_packet instances of the | |
1816 | * other secondary interfaces as well. | |
1817 | */ | |
1818 | if (forw_packet->own && | |
1819 | forw_packet->if_incoming == forw_packet->if_outgoing) | |
1820 | batadv_iv_ogm_schedule(forw_packet->if_incoming); | |
1821 | ||
1822 | out: | |
1823 | /* don't count own packet */ | |
1824 | if (!forw_packet->own) | |
1825 | atomic_inc(&bat_priv->batman_queue_left); | |
1826 | ||
1827 | batadv_forw_packet_free(forw_packet); | |
1828 | } | |
1829 | ||
fe8bc396 | 1830 | static int batadv_iv_ogm_receive(struct sk_buff *skb, |
56303d34 | 1831 | struct batadv_hard_iface *if_incoming) |
fc957275 | 1832 | { |
56303d34 | 1833 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
7351a482 | 1834 | struct batadv_ogm_packet *ogm_packet; |
6b5e971a | 1835 | u8 *packet_pos; |
7351a482 | 1836 | int ogm_offset; |
ef261577 | 1837 | bool ret; |
c3e29312 | 1838 | |
7e071c79 | 1839 | ret = batadv_check_management_packet(skb, if_incoming, BATADV_OGM_HLEN); |
c3e29312 ML |
1840 | if (!ret) |
1841 | return NET_RX_DROP; | |
fc957275 | 1842 | |
edbf12ba ML |
1843 | /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface |
1844 | * that does not have B.A.T.M.A.N. IV enabled ? | |
1845 | */ | |
29824a55 | 1846 | if (bat_priv->algo_ops->iface.enable != batadv_iv_ogm_iface_enable) |
edbf12ba ML |
1847 | return NET_RX_DROP; |
1848 | ||
d69909d2 SE |
1849 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_RX); |
1850 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES, | |
f8214865 MH |
1851 | skb->len + ETH_HLEN); |
1852 | ||
7351a482 SW |
1853 | ogm_offset = 0; |
1854 | ogm_packet = (struct batadv_ogm_packet *)skb->data; | |
fc957275 ML |
1855 | |
1856 | /* unpack the aggregated packets and process them one by one */ | |
7351a482 SW |
1857 | while (batadv_iv_ogm_aggr_packet(ogm_offset, skb_headlen(skb), |
1858 | ogm_packet->tvlv_len)) { | |
1859 | batadv_iv_ogm_process(skb, ogm_offset, if_incoming); | |
fc957275 | 1860 | |
7351a482 SW |
1861 | ogm_offset += BATADV_OGM_HLEN; |
1862 | ogm_offset += ntohs(ogm_packet->tvlv_len); | |
fc957275 | 1863 | |
7351a482 SW |
1864 | packet_pos = skb->data + ogm_offset; |
1865 | ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b47506d9 | 1866 | } |
c3e29312 ML |
1867 | |
1868 | kfree_skb(skb); | |
1869 | return NET_RX_SUCCESS; | |
fc957275 | 1870 | } |
1c280471 | 1871 | |
1b371d13 SW |
1872 | /** |
1873 | * batadv_iv_ogm_orig_print_neigh - print neighbors for the originator table | |
89652331 SW |
1874 | * @orig_node: the orig_node for which the neighbors are printed |
1875 | * @if_outgoing: outgoing interface for these entries | |
1876 | * @seq: debugfs table seq_file struct | |
1877 | * | |
1878 | * Must be called while holding an rcu lock. | |
1879 | */ | |
1880 | static void | |
1881 | batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node *orig_node, | |
1882 | struct batadv_hard_iface *if_outgoing, | |
1883 | struct seq_file *seq) | |
1884 | { | |
1885 | struct batadv_neigh_node *neigh_node; | |
1886 | struct batadv_neigh_ifinfo *n_ifinfo; | |
1887 | ||
1888 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { | |
1889 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); | |
1890 | if (!n_ifinfo) | |
1891 | continue; | |
1892 | ||
1893 | seq_printf(seq, " %pM (%3i)", | |
1894 | neigh_node->addr, | |
1895 | n_ifinfo->bat_iv.tq_avg); | |
1896 | ||
044fa3ae | 1897 | batadv_neigh_ifinfo_put(n_ifinfo); |
89652331 SW |
1898 | } |
1899 | } | |
1900 | ||
737a2a22 AQ |
1901 | /** |
1902 | * batadv_iv_ogm_orig_print - print the originator table | |
1903 | * @bat_priv: the bat priv with all the soft interface information | |
1904 | * @seq: debugfs table seq_file struct | |
cb1c92ec | 1905 | * @if_outgoing: the outgoing interface for which this should be printed |
737a2a22 AQ |
1906 | */ |
1907 | static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv, | |
cb1c92ec SW |
1908 | struct seq_file *seq, |
1909 | struct batadv_hard_iface *if_outgoing) | |
737a2a22 | 1910 | { |
89652331 | 1911 | struct batadv_neigh_node *neigh_node; |
737a2a22 AQ |
1912 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
1913 | int last_seen_msecs, last_seen_secs; | |
1914 | struct batadv_orig_node *orig_node; | |
89652331 | 1915 | struct batadv_neigh_ifinfo *n_ifinfo; |
737a2a22 AQ |
1916 | unsigned long last_seen_jiffies; |
1917 | struct hlist_head *head; | |
1918 | int batman_count = 0; | |
6b5e971a | 1919 | u32 i; |
737a2a22 | 1920 | |
925a6f37 AQ |
1921 | seq_puts(seq, |
1922 | " Originator last-seen (#/255) Nexthop [outgoingIF]: Potential nexthops ...\n"); | |
737a2a22 AQ |
1923 | |
1924 | for (i = 0; i < hash->size; i++) { | |
1925 | head = &hash->table[i]; | |
1926 | ||
1927 | rcu_read_lock(); | |
1928 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
7351a482 | 1929 | neigh_node = batadv_orig_router_get(orig_node, |
cb1c92ec | 1930 | if_outgoing); |
737a2a22 AQ |
1931 | if (!neigh_node) |
1932 | continue; | |
1933 | ||
89652331 | 1934 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, |
cb1c92ec | 1935 | if_outgoing); |
89652331 SW |
1936 | if (!n_ifinfo) |
1937 | goto next; | |
1938 | ||
1939 | if (n_ifinfo->bat_iv.tq_avg == 0) | |
737a2a22 AQ |
1940 | goto next; |
1941 | ||
1942 | last_seen_jiffies = jiffies - orig_node->last_seen; | |
1943 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
1944 | last_seen_secs = last_seen_msecs / 1000; | |
1945 | last_seen_msecs = last_seen_msecs % 1000; | |
1946 | ||
1947 | seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:", | |
1948 | orig_node->orig, last_seen_secs, | |
89652331 | 1949 | last_seen_msecs, n_ifinfo->bat_iv.tq_avg, |
737a2a22 AQ |
1950 | neigh_node->addr, |
1951 | neigh_node->if_incoming->net_dev->name); | |
1952 | ||
cb1c92ec SW |
1953 | batadv_iv_ogm_orig_print_neigh(orig_node, if_outgoing, |
1954 | seq); | |
737a2a22 AQ |
1955 | seq_puts(seq, "\n"); |
1956 | batman_count++; | |
1957 | ||
1958 | next: | |
25bb2509 | 1959 | batadv_neigh_node_put(neigh_node); |
89652331 | 1960 | if (n_ifinfo) |
044fa3ae | 1961 | batadv_neigh_ifinfo_put(n_ifinfo); |
737a2a22 AQ |
1962 | } |
1963 | rcu_read_unlock(); | |
1964 | } | |
1965 | ||
1966 | if (batman_count == 0) | |
1967 | seq_puts(seq, "No batman nodes in range ...\n"); | |
1968 | } | |
1969 | ||
7587405a ML |
1970 | /** |
1971 | * batadv_iv_hardif_neigh_print - print a single hop neighbour node | |
1972 | * @seq: neighbour table seq_file struct | |
1973 | * @hardif_neigh: hardif neighbour information | |
1974 | */ | |
1975 | static void | |
1976 | batadv_iv_hardif_neigh_print(struct seq_file *seq, | |
1977 | struct batadv_hardif_neigh_node *hardif_neigh) | |
1978 | { | |
1979 | int last_secs, last_msecs; | |
1980 | ||
1981 | last_secs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) / 1000; | |
1982 | last_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) % 1000; | |
1983 | ||
1984 | seq_printf(seq, " %10s %pM %4i.%03is\n", | |
1985 | hardif_neigh->if_incoming->net_dev->name, | |
1986 | hardif_neigh->addr, last_secs, last_msecs); | |
1987 | } | |
1988 | ||
1989 | /** | |
1990 | * batadv_iv_ogm_neigh_print - print the single hop neighbour list | |
1991 | * @bat_priv: the bat priv with all the soft interface information | |
1992 | * @seq: neighbour table seq_file struct | |
1993 | */ | |
1994 | static void batadv_iv_neigh_print(struct batadv_priv *bat_priv, | |
1995 | struct seq_file *seq) | |
1996 | { | |
1997 | struct net_device *net_dev = (struct net_device *)seq->private; | |
1998 | struct batadv_hardif_neigh_node *hardif_neigh; | |
1999 | struct batadv_hard_iface *hard_iface; | |
2000 | int batman_count = 0; | |
2001 | ||
925a6f37 | 2002 | seq_puts(seq, " IF Neighbor last-seen\n"); |
7587405a ML |
2003 | |
2004 | rcu_read_lock(); | |
2005 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
2006 | if (hard_iface->soft_iface != net_dev) | |
2007 | continue; | |
2008 | ||
2009 | hlist_for_each_entry_rcu(hardif_neigh, | |
2010 | &hard_iface->neigh_list, list) { | |
2011 | batadv_iv_hardif_neigh_print(seq, hardif_neigh); | |
2012 | batman_count++; | |
2013 | } | |
2014 | } | |
2015 | rcu_read_unlock(); | |
2016 | ||
2017 | if (batman_count == 0) | |
2018 | seq_puts(seq, "No batman nodes in range ...\n"); | |
2019 | } | |
2020 | ||
a3285a8f | 2021 | /** |
57b12502 | 2022 | * batadv_iv_ogm_neigh_diff - calculate tq difference of two neighbors |
a3285a8f | 2023 | * @neigh1: the first neighbor object of the comparison |
89652331 | 2024 | * @if_outgoing1: outgoing interface for the first neighbor |
a3285a8f | 2025 | * @neigh2: the second neighbor object of the comparison |
89652331 | 2026 | * @if_outgoing2: outgoing interface for the second neighbor |
57b12502 | 2027 | * @diff: pointer to integer receiving the calculated difference |
a3285a8f | 2028 | * |
57b12502 MP |
2029 | * The content of *@diff is only valid when this function returns true. |
2030 | * It is less, equal to or greater than 0 if the metric via neigh1 is lower, | |
2031 | * the same as or higher than the metric via neigh2 | |
2032 | * | |
2033 | * Return: true when the difference could be calculated, false otherwise | |
a3285a8f | 2034 | */ |
57b12502 MP |
2035 | static bool batadv_iv_ogm_neigh_diff(struct batadv_neigh_node *neigh1, |
2036 | struct batadv_hard_iface *if_outgoing1, | |
2037 | struct batadv_neigh_node *neigh2, | |
2038 | struct batadv_hard_iface *if_outgoing2, | |
2039 | int *diff) | |
a3285a8f | 2040 | { |
89652331 | 2041 | struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; |
6b5e971a | 2042 | u8 tq1, tq2; |
57b12502 | 2043 | bool ret = true; |
89652331 SW |
2044 | |
2045 | neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); | |
2046 | neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
a3285a8f | 2047 | |
89652331 | 2048 | if (!neigh1_ifinfo || !neigh2_ifinfo) { |
57b12502 | 2049 | ret = false; |
89652331 SW |
2050 | goto out; |
2051 | } | |
a3285a8f | 2052 | |
89652331 SW |
2053 | tq1 = neigh1_ifinfo->bat_iv.tq_avg; |
2054 | tq2 = neigh2_ifinfo->bat_iv.tq_avg; | |
57b12502 | 2055 | *diff = (int)tq1 - (int)tq2; |
89652331 SW |
2056 | |
2057 | out: | |
2058 | if (neigh1_ifinfo) | |
044fa3ae | 2059 | batadv_neigh_ifinfo_put(neigh1_ifinfo); |
89652331 | 2060 | if (neigh2_ifinfo) |
044fa3ae | 2061 | batadv_neigh_ifinfo_put(neigh2_ifinfo); |
89652331 | 2062 | |
57b12502 MP |
2063 | return ret; |
2064 | } | |
2065 | ||
2066 | /** | |
2067 | * batadv_iv_ogm_neigh_cmp - compare the metrics of two neighbors | |
2068 | * @neigh1: the first neighbor object of the comparison | |
2069 | * @if_outgoing1: outgoing interface for the first neighbor | |
2070 | * @neigh2: the second neighbor object of the comparison | |
2071 | * @if_outgoing2: outgoing interface for the second neighbor | |
2072 | * | |
2073 | * Return: a value less, equal to or greater than 0 if the metric via neigh1 is | |
2074 | * lower, the same as or higher than the metric via neigh2 | |
2075 | */ | |
2076 | static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node *neigh1, | |
2077 | struct batadv_hard_iface *if_outgoing1, | |
2078 | struct batadv_neigh_node *neigh2, | |
2079 | struct batadv_hard_iface *if_outgoing2) | |
2080 | { | |
2081 | bool ret; | |
2082 | int diff; | |
2083 | ||
2084 | ret = batadv_iv_ogm_neigh_diff(neigh1, if_outgoing1, neigh2, | |
2085 | if_outgoing2, &diff); | |
2086 | if (!ret) | |
2087 | return 0; | |
2088 | ||
89652331 | 2089 | return diff; |
a3285a8f AQ |
2090 | } |
2091 | ||
c43c981e | 2092 | /** |
18165f6f SW |
2093 | * batadv_iv_ogm_neigh_is_sob - check if neigh1 is similarly good or better |
2094 | * than neigh2 from the metric prospective | |
c43c981e | 2095 | * @neigh1: the first neighbor object of the comparison |
95298a91 | 2096 | * @if_outgoing1: outgoing interface for the first neighbor |
c43c981e | 2097 | * @neigh2: the second neighbor object of the comparison |
89652331 | 2098 | * @if_outgoing2: outgoing interface for the second neighbor |
95298a91 | 2099 | * |
62fe710f | 2100 | * Return: true if the metric via neigh1 is equally good or better than |
89652331 | 2101 | * the metric via neigh2, false otherwise. |
c43c981e | 2102 | */ |
89652331 | 2103 | static bool |
18165f6f | 2104 | batadv_iv_ogm_neigh_is_sob(struct batadv_neigh_node *neigh1, |
89652331 SW |
2105 | struct batadv_hard_iface *if_outgoing1, |
2106 | struct batadv_neigh_node *neigh2, | |
2107 | struct batadv_hard_iface *if_outgoing2) | |
c43c981e | 2108 | { |
89652331 | 2109 | bool ret; |
57b12502 | 2110 | int diff; |
c43c981e | 2111 | |
57b12502 MP |
2112 | ret = batadv_iv_ogm_neigh_diff(neigh1, if_outgoing1, neigh2, |
2113 | if_outgoing2, &diff); | |
2114 | if (!ret) | |
2115 | return false; | |
89652331 | 2116 | |
57b12502 | 2117 | ret = diff > -BATADV_TQ_SIMILARITY_THRESHOLD; |
89652331 | 2118 | return ret; |
c43c981e AQ |
2119 | } |
2120 | ||
f0d97253 AQ |
2121 | static void batadv_iv_iface_activate(struct batadv_hard_iface *hard_iface) |
2122 | { | |
2123 | /* begin scheduling originator messages on that interface */ | |
2124 | batadv_iv_ogm_schedule(hard_iface); | |
2125 | } | |
2126 | ||
34d99cfe AQ |
2127 | static struct batadv_gw_node * |
2128 | batadv_iv_gw_get_best_gw_node(struct batadv_priv *bat_priv) | |
2129 | { | |
2130 | struct batadv_neigh_node *router; | |
2131 | struct batadv_neigh_ifinfo *router_ifinfo; | |
2132 | struct batadv_gw_node *gw_node, *curr_gw = NULL; | |
2133 | u64 max_gw_factor = 0; | |
2134 | u64 tmp_gw_factor = 0; | |
2135 | u8 max_tq = 0; | |
2136 | u8 tq_avg; | |
2137 | struct batadv_orig_node *orig_node; | |
2138 | ||
2139 | rcu_read_lock(); | |
2140 | hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) { | |
2141 | orig_node = gw_node->orig_node; | |
2142 | router = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT); | |
2143 | if (!router) | |
2144 | continue; | |
2145 | ||
2146 | router_ifinfo = batadv_neigh_ifinfo_get(router, | |
2147 | BATADV_IF_DEFAULT); | |
2148 | if (!router_ifinfo) | |
2149 | goto next; | |
2150 | ||
2151 | if (!kref_get_unless_zero(&gw_node->refcount)) | |
2152 | goto next; | |
2153 | ||
2154 | tq_avg = router_ifinfo->bat_iv.tq_avg; | |
2155 | ||
2156 | switch (atomic_read(&bat_priv->gw.sel_class)) { | |
2157 | case 1: /* fast connection */ | |
2158 | tmp_gw_factor = tq_avg * tq_avg; | |
2159 | tmp_gw_factor *= gw_node->bandwidth_down; | |
2160 | tmp_gw_factor *= 100 * 100; | |
2161 | tmp_gw_factor >>= 18; | |
2162 | ||
2163 | if ((tmp_gw_factor > max_gw_factor) || | |
2164 | ((tmp_gw_factor == max_gw_factor) && | |
2165 | (tq_avg > max_tq))) { | |
2166 | if (curr_gw) | |
2167 | batadv_gw_node_put(curr_gw); | |
2168 | curr_gw = gw_node; | |
2169 | kref_get(&curr_gw->refcount); | |
2170 | } | |
2171 | break; | |
2172 | ||
2173 | default: /* 2: stable connection (use best statistic) | |
2174 | * 3: fast-switch (use best statistic but change as | |
2175 | * soon as a better gateway appears) | |
2176 | * XX: late-switch (use best statistic but change as | |
2177 | * soon as a better gateway appears which has | |
2178 | * $routing_class more tq points) | |
2179 | */ | |
2180 | if (tq_avg > max_tq) { | |
2181 | if (curr_gw) | |
2182 | batadv_gw_node_put(curr_gw); | |
2183 | curr_gw = gw_node; | |
2184 | kref_get(&curr_gw->refcount); | |
2185 | } | |
2186 | break; | |
2187 | } | |
2188 | ||
2189 | if (tq_avg > max_tq) | |
2190 | max_tq = tq_avg; | |
2191 | ||
2192 | if (tmp_gw_factor > max_gw_factor) | |
2193 | max_gw_factor = tmp_gw_factor; | |
2194 | ||
2195 | batadv_gw_node_put(gw_node); | |
2196 | ||
2197 | next: | |
2198 | batadv_neigh_node_put(router); | |
2199 | if (router_ifinfo) | |
2200 | batadv_neigh_ifinfo_put(router_ifinfo); | |
2201 | } | |
2202 | rcu_read_unlock(); | |
2203 | ||
2204 | return curr_gw; | |
2205 | } | |
2206 | ||
2207 | static bool batadv_iv_gw_is_eligible(struct batadv_priv *bat_priv, | |
2208 | struct batadv_orig_node *curr_gw_orig, | |
2209 | struct batadv_orig_node *orig_node) | |
2210 | { | |
2211 | struct batadv_neigh_ifinfo *router_orig_ifinfo = NULL; | |
2212 | struct batadv_neigh_ifinfo *router_gw_ifinfo = NULL; | |
2213 | struct batadv_neigh_node *router_gw = NULL; | |
2214 | struct batadv_neigh_node *router_orig = NULL; | |
2215 | u8 gw_tq_avg, orig_tq_avg; | |
2216 | bool ret = false; | |
2217 | ||
2218 | /* dynamic re-election is performed only on fast or late switch */ | |
2219 | if (atomic_read(&bat_priv->gw.sel_class) <= 2) | |
2220 | return false; | |
2221 | ||
2222 | router_gw = batadv_orig_router_get(curr_gw_orig, BATADV_IF_DEFAULT); | |
2223 | if (!router_gw) { | |
2224 | ret = true; | |
2225 | goto out; | |
2226 | } | |
2227 | ||
2228 | router_gw_ifinfo = batadv_neigh_ifinfo_get(router_gw, | |
2229 | BATADV_IF_DEFAULT); | |
2230 | if (!router_gw_ifinfo) { | |
2231 | ret = true; | |
2232 | goto out; | |
2233 | } | |
2234 | ||
2235 | router_orig = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT); | |
2236 | if (!router_orig) | |
2237 | goto out; | |
2238 | ||
2239 | router_orig_ifinfo = batadv_neigh_ifinfo_get(router_orig, | |
2240 | BATADV_IF_DEFAULT); | |
2241 | if (!router_orig_ifinfo) | |
2242 | goto out; | |
2243 | ||
2244 | gw_tq_avg = router_gw_ifinfo->bat_iv.tq_avg; | |
2245 | orig_tq_avg = router_orig_ifinfo->bat_iv.tq_avg; | |
2246 | ||
2247 | /* the TQ value has to be better */ | |
2248 | if (orig_tq_avg < gw_tq_avg) | |
2249 | goto out; | |
2250 | ||
2251 | /* if the routing class is greater than 3 the value tells us how much | |
2252 | * greater the TQ value of the new gateway must be | |
2253 | */ | |
2254 | if ((atomic_read(&bat_priv->gw.sel_class) > 3) && | |
2255 | (orig_tq_avg - gw_tq_avg < atomic_read(&bat_priv->gw.sel_class))) | |
2256 | goto out; | |
2257 | ||
2258 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
2259 | "Restarting gateway selection: better gateway found (tq curr: %i, tq new: %i)\n", | |
2260 | gw_tq_avg, orig_tq_avg); | |
2261 | ||
2262 | ret = true; | |
2263 | out: | |
2264 | if (router_gw_ifinfo) | |
2265 | batadv_neigh_ifinfo_put(router_gw_ifinfo); | |
2266 | if (router_orig_ifinfo) | |
2267 | batadv_neigh_ifinfo_put(router_orig_ifinfo); | |
2268 | if (router_gw) | |
2269 | batadv_neigh_node_put(router_gw); | |
2270 | if (router_orig) | |
2271 | batadv_neigh_node_put(router_orig); | |
2272 | ||
2273 | return ret; | |
2274 | } | |
2275 | ||
2276 | /* fails if orig_node has no router */ | |
2277 | static int batadv_iv_gw_write_buffer_text(struct batadv_priv *bat_priv, | |
2278 | struct seq_file *seq, | |
2279 | const struct batadv_gw_node *gw_node) | |
2280 | { | |
2281 | struct batadv_gw_node *curr_gw; | |
2282 | struct batadv_neigh_node *router; | |
2283 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; | |
2284 | int ret = -1; | |
2285 | ||
2286 | router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT); | |
2287 | if (!router) | |
2288 | goto out; | |
2289 | ||
2290 | router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT); | |
2291 | if (!router_ifinfo) | |
2292 | goto out; | |
2293 | ||
2294 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); | |
2295 | ||
2296 | seq_printf(seq, "%s %pM (%3i) %pM [%10s]: %u.%u/%u.%u MBit\n", | |
2297 | (curr_gw == gw_node ? "=>" : " "), | |
2298 | gw_node->orig_node->orig, | |
2299 | router_ifinfo->bat_iv.tq_avg, router->addr, | |
2300 | router->if_incoming->net_dev->name, | |
2301 | gw_node->bandwidth_down / 10, | |
2302 | gw_node->bandwidth_down % 10, | |
2303 | gw_node->bandwidth_up / 10, | |
2304 | gw_node->bandwidth_up % 10); | |
2305 | ret = seq_has_overflowed(seq) ? -1 : 0; | |
2306 | ||
2307 | if (curr_gw) | |
2308 | batadv_gw_node_put(curr_gw); | |
2309 | out: | |
2310 | if (router_ifinfo) | |
2311 | batadv_neigh_ifinfo_put(router_ifinfo); | |
2312 | if (router) | |
2313 | batadv_neigh_node_put(router); | |
2314 | return ret; | |
2315 | } | |
2316 | ||
2317 | static void batadv_iv_gw_print(struct batadv_priv *bat_priv, | |
2318 | struct seq_file *seq) | |
2319 | { | |
2320 | struct batadv_gw_node *gw_node; | |
2321 | int gw_count = 0; | |
2322 | ||
2323 | seq_puts(seq, | |
2324 | " Gateway (#/255) Nexthop [outgoingIF]: advertised uplink bandwidth\n"); | |
2325 | ||
2326 | rcu_read_lock(); | |
2327 | hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) { | |
2328 | /* fails if orig_node has no router */ | |
2329 | if (batadv_iv_gw_write_buffer_text(bat_priv, seq, gw_node) < 0) | |
2330 | continue; | |
2331 | ||
2332 | gw_count++; | |
2333 | } | |
2334 | rcu_read_unlock(); | |
2335 | ||
2336 | if (gw_count == 0) | |
2337 | seq_puts(seq, "No gateways in range ...\n"); | |
2338 | } | |
2339 | ||
56303d34 | 2340 | static struct batadv_algo_ops batadv_batman_iv __read_mostly = { |
519d3497 | 2341 | .name = "BATMAN_IV", |
29824a55 AQ |
2342 | .iface = { |
2343 | .activate = batadv_iv_iface_activate, | |
2344 | .enable = batadv_iv_ogm_iface_enable, | |
2345 | .disable = batadv_iv_ogm_iface_disable, | |
2346 | .update_mac = batadv_iv_ogm_iface_update_mac, | |
2347 | .primary_set = batadv_iv_ogm_primary_iface_set, | |
2348 | }, | |
2349 | .neigh = { | |
2350 | .cmp = batadv_iv_ogm_neigh_cmp, | |
2351 | .is_similar_or_better = batadv_iv_ogm_neigh_is_sob, | |
2352 | .print = batadv_iv_neigh_print, | |
2353 | }, | |
2354 | .orig = { | |
2355 | .print = batadv_iv_ogm_orig_print, | |
2356 | .free = batadv_iv_ogm_orig_free, | |
2357 | .add_if = batadv_iv_ogm_orig_add_if, | |
2358 | .del_if = batadv_iv_ogm_orig_del_if, | |
2359 | }, | |
34d99cfe AQ |
2360 | .gw = { |
2361 | .get_best_gw_node = batadv_iv_gw_get_best_gw_node, | |
2362 | .is_eligible = batadv_iv_gw_is_eligible, | |
2363 | .print = batadv_iv_gw_print, | |
2364 | }, | |
1c280471 ML |
2365 | }; |
2366 | ||
81c524f7 | 2367 | int __init batadv_iv_init(void) |
1c280471 | 2368 | { |
c3e29312 ML |
2369 | int ret; |
2370 | ||
2371 | /* batman originator packet */ | |
acd34afa SE |
2372 | ret = batadv_recv_handler_register(BATADV_IV_OGM, |
2373 | batadv_iv_ogm_receive); | |
c3e29312 ML |
2374 | if (ret < 0) |
2375 | goto out; | |
2376 | ||
fe8bc396 | 2377 | ret = batadv_algo_register(&batadv_batman_iv); |
c3e29312 ML |
2378 | if (ret < 0) |
2379 | goto handler_unregister; | |
2380 | ||
2381 | goto out; | |
2382 | ||
2383 | handler_unregister: | |
acd34afa | 2384 | batadv_recv_handler_unregister(BATADV_IV_OGM); |
c3e29312 ML |
2385 | out: |
2386 | return ret; | |
1c280471 | 2387 | } |