Commit | Line | Data |
---|---|---|
7db7d9f3 | 1 | // SPDX-License-Identifier: GPL-2.0 |
ac79cbb9 | 2 | /* Copyright (C) 2007-2017 B.A.T.M.A.N. contributors: |
fc957275 ML |
3 | * |
4 | * Marek Lindner, Simon Wunderlich | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of version 2 of the GNU General Public | |
8 | * License as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
ebf38fb7 | 16 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
fc957275 ML |
17 | */ |
18 | ||
a2d08166 | 19 | #include "bat_iv_ogm.h" |
fc957275 | 20 | #include "main.h" |
1e2c2a4f SE |
21 | |
22 | #include <linux/atomic.h> | |
23 | #include <linux/bitmap.h> | |
24 | #include <linux/bitops.h> | |
25 | #include <linux/bug.h> | |
26 | #include <linux/byteorder/generic.h> | |
27 | #include <linux/cache.h> | |
28 | #include <linux/errno.h> | |
29 | #include <linux/etherdevice.h> | |
b92b94ac | 30 | #include <linux/gfp.h> |
1e2c2a4f SE |
31 | #include <linux/if_ether.h> |
32 | #include <linux/init.h> | |
33 | #include <linux/jiffies.h> | |
f0d97253 | 34 | #include <linux/kernel.h> |
77ae32e8 | 35 | #include <linux/kref.h> |
fcafa5e7 | 36 | #include <linux/list.h> |
64ae7445 | 37 | #include <linux/lockdep.h> |
1e2c2a4f | 38 | #include <linux/netdevice.h> |
024f99cb | 39 | #include <linux/netlink.h> |
1e2c2a4f SE |
40 | #include <linux/pkt_sched.h> |
41 | #include <linux/printk.h> | |
42 | #include <linux/random.h> | |
43 | #include <linux/rculist.h> | |
44 | #include <linux/rcupdate.h> | |
45 | #include <linux/seq_file.h> | |
46 | #include <linux/skbuff.h> | |
47 | #include <linux/slab.h> | |
48 | #include <linux/spinlock.h> | |
49 | #include <linux/stddef.h> | |
50 | #include <linux/string.h> | |
51 | #include <linux/types.h> | |
52 | #include <linux/workqueue.h> | |
024f99cb MS |
53 | #include <net/genetlink.h> |
54 | #include <net/netlink.h> | |
fec149f5 | 55 | #include <uapi/linux/batadv_packet.h> |
024f99cb | 56 | #include <uapi/linux/batman_adv.h> |
1e2c2a4f | 57 | |
a2d08166 | 58 | #include "bat_algo.h" |
1e2c2a4f | 59 | #include "bitarray.h" |
34d99cfe | 60 | #include "gateway_client.h" |
1e2c2a4f SE |
61 | #include "hard-interface.h" |
62 | #include "hash.h" | |
ba412080 | 63 | #include "log.h" |
024f99cb | 64 | #include "netlink.h" |
1e2c2a4f | 65 | #include "network-coding.h" |
fc957275 ML |
66 | #include "originator.h" |
67 | #include "routing.h" | |
fc957275 | 68 | #include "send.h" |
1e2c2a4f | 69 | #include "translation-table.h" |
1f8dce49 | 70 | #include "tvlv.h" |
fc957275 | 71 | |
f0d97253 AQ |
72 | static void batadv_iv_send_outstanding_bat_ogm_packet(struct work_struct *work); |
73 | ||
791c2a2d | 74 | /** |
95298a91 | 75 | * enum batadv_dup_status - duplicate status |
791c2a2d AQ |
76 | */ |
77 | enum batadv_dup_status { | |
8b84cc4f | 78 | /** @BATADV_NO_DUP: the packet is no duplicate */ |
791c2a2d | 79 | BATADV_NO_DUP = 0, |
8b84cc4f SE |
80 | |
81 | /** | |
82 | * @BATADV_ORIG_DUP: OGM is a duplicate in the originator (but not for | |
83 | * the neighbor) | |
84 | */ | |
791c2a2d | 85 | BATADV_ORIG_DUP, |
8b84cc4f SE |
86 | |
87 | /** @BATADV_NEIGH_DUP: OGM is a duplicate for the neighbor */ | |
791c2a2d | 88 | BATADV_NEIGH_DUP, |
8b84cc4f SE |
89 | |
90 | /** | |
91 | * @BATADV_PROTECTED: originator is currently protected (after reboot) | |
92 | */ | |
791c2a2d AQ |
93 | BATADV_PROTECTED, |
94 | }; | |
95 | ||
24a5deeb | 96 | /** |
7e9a8c2c | 97 | * batadv_ring_buffer_set() - update the ring buffer with the given value |
24a5deeb AQ |
98 | * @lq_recv: pointer to the ring buffer |
99 | * @lq_index: index to store the value at | |
100 | * @value: value to store in the ring buffer | |
101 | */ | |
6b5e971a | 102 | static void batadv_ring_buffer_set(u8 lq_recv[], u8 *lq_index, u8 value) |
24a5deeb AQ |
103 | { |
104 | lq_recv[*lq_index] = value; | |
105 | *lq_index = (*lq_index + 1) % BATADV_TQ_GLOBAL_WINDOW_SIZE; | |
106 | } | |
107 | ||
108 | /** | |
7e9a8c2c | 109 | * batadv_ring_buffer_avg() - compute the average of all non-zero values stored |
24a5deeb AQ |
110 | * in the given ring buffer |
111 | * @lq_recv: pointer to the ring buffer | |
112 | * | |
62fe710f | 113 | * Return: computed average value. |
24a5deeb | 114 | */ |
6b5e971a | 115 | static u8 batadv_ring_buffer_avg(const u8 lq_recv[]) |
24a5deeb | 116 | { |
6b5e971a SE |
117 | const u8 *ptr; |
118 | u16 count = 0; | |
119 | u16 i = 0; | |
120 | u16 sum = 0; | |
24a5deeb AQ |
121 | |
122 | ptr = lq_recv; | |
123 | ||
124 | while (i < BATADV_TQ_GLOBAL_WINDOW_SIZE) { | |
125 | if (*ptr != 0) { | |
126 | count++; | |
127 | sum += *ptr; | |
128 | } | |
129 | ||
130 | i++; | |
131 | ptr++; | |
132 | } | |
133 | ||
134 | if (count == 0) | |
135 | return 0; | |
136 | ||
6b5e971a | 137 | return (u8)(sum / count); |
24a5deeb | 138 | } |
d98cae64 | 139 | |
d0015fdd | 140 | /** |
7e9a8c2c | 141 | * batadv_iv_ogm_orig_free() - free the private resources allocated for this |
d0015fdd AQ |
142 | * orig_node |
143 | * @orig_node: the orig_node for which the resources have to be free'd | |
144 | */ | |
145 | static void batadv_iv_ogm_orig_free(struct batadv_orig_node *orig_node) | |
146 | { | |
147 | kfree(orig_node->bat_iv.bcast_own); | |
148 | kfree(orig_node->bat_iv.bcast_own_sum); | |
149 | } | |
150 | ||
151 | /** | |
7e9a8c2c SE |
152 | * batadv_iv_ogm_orig_add_if() - change the private structures of the orig_node |
153 | * to include the new hard-interface | |
d0015fdd AQ |
154 | * @orig_node: the orig_node that has to be changed |
155 | * @max_if_num: the current amount of interfaces | |
156 | * | |
62fe710f | 157 | * Return: 0 on success, a negative error code otherwise. |
d0015fdd AQ |
158 | */ |
159 | static int batadv_iv_ogm_orig_add_if(struct batadv_orig_node *orig_node, | |
160 | int max_if_num) | |
161 | { | |
162 | void *data_ptr; | |
0185dda6 | 163 | size_t old_size; |
d0015fdd AQ |
164 | int ret = -ENOMEM; |
165 | ||
166 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
167 | ||
d0015fdd | 168 | old_size = (max_if_num - 1) * sizeof(unsigned long) * BATADV_NUM_WORDS; |
0185dda6 AQ |
169 | data_ptr = kmalloc_array(max_if_num, |
170 | BATADV_NUM_WORDS * sizeof(unsigned long), | |
171 | GFP_ATOMIC); | |
d0015fdd AQ |
172 | if (!data_ptr) |
173 | goto unlock; | |
174 | ||
175 | memcpy(data_ptr, orig_node->bat_iv.bcast_own, old_size); | |
176 | kfree(orig_node->bat_iv.bcast_own); | |
177 | orig_node->bat_iv.bcast_own = data_ptr; | |
178 | ||
6b5e971a | 179 | data_ptr = kmalloc_array(max_if_num, sizeof(u8), GFP_ATOMIC); |
f7dcdf5f | 180 | if (!data_ptr) |
d0015fdd | 181 | goto unlock; |
d0015fdd AQ |
182 | |
183 | memcpy(data_ptr, orig_node->bat_iv.bcast_own_sum, | |
6b5e971a | 184 | (max_if_num - 1) * sizeof(u8)); |
d0015fdd AQ |
185 | kfree(orig_node->bat_iv.bcast_own_sum); |
186 | orig_node->bat_iv.bcast_own_sum = data_ptr; | |
187 | ||
188 | ret = 0; | |
189 | ||
190 | unlock: | |
191 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
192 | ||
193 | return ret; | |
194 | } | |
195 | ||
196 | /** | |
7e9a8c2c | 197 | * batadv_iv_ogm_drop_bcast_own_entry() - drop section of bcast_own |
d0015fdd AQ |
198 | * @orig_node: the orig_node that has to be changed |
199 | * @max_if_num: the current amount of interfaces | |
200 | * @del_if_num: the index of the interface being removed | |
d0015fdd | 201 | */ |
64ae7445 SE |
202 | static void |
203 | batadv_iv_ogm_drop_bcast_own_entry(struct batadv_orig_node *orig_node, | |
204 | int max_if_num, int del_if_num) | |
d0015fdd | 205 | { |
64ae7445 SE |
206 | size_t chunk_size; |
207 | size_t if_offset; | |
208 | void *data_ptr; | |
d0015fdd | 209 | |
64ae7445 | 210 | lockdep_assert_held(&orig_node->bat_iv.ogm_cnt_lock); |
d0015fdd AQ |
211 | |
212 | chunk_size = sizeof(unsigned long) * BATADV_NUM_WORDS; | |
0185dda6 | 213 | data_ptr = kmalloc_array(max_if_num, chunk_size, GFP_ATOMIC); |
d0015fdd | 214 | if (!data_ptr) |
64ae7445 SE |
215 | /* use old buffer when new one could not be allocated */ |
216 | data_ptr = orig_node->bat_iv.bcast_own; | |
d0015fdd AQ |
217 | |
218 | /* copy first part */ | |
64ae7445 | 219 | memmove(data_ptr, orig_node->bat_iv.bcast_own, del_if_num * chunk_size); |
d0015fdd AQ |
220 | |
221 | /* copy second part */ | |
13bbdd37 | 222 | if_offset = (del_if_num + 1) * chunk_size; |
64ae7445 SE |
223 | memmove((char *)data_ptr + del_if_num * chunk_size, |
224 | (uint8_t *)orig_node->bat_iv.bcast_own + if_offset, | |
225 | (max_if_num - del_if_num) * chunk_size); | |
d0015fdd | 226 | |
64ae7445 SE |
227 | /* bcast_own was shrunk down in new buffer; free old one */ |
228 | if (orig_node->bat_iv.bcast_own != data_ptr) { | |
229 | kfree(orig_node->bat_iv.bcast_own); | |
230 | orig_node->bat_iv.bcast_own = data_ptr; | |
231 | } | |
232 | } | |
d0015fdd | 233 | |
64ae7445 | 234 | /** |
7e9a8c2c | 235 | * batadv_iv_ogm_drop_bcast_own_sum_entry() - drop section of bcast_own_sum |
64ae7445 SE |
236 | * @orig_node: the orig_node that has to be changed |
237 | * @max_if_num: the current amount of interfaces | |
238 | * @del_if_num: the index of the interface being removed | |
239 | */ | |
240 | static void | |
241 | batadv_iv_ogm_drop_bcast_own_sum_entry(struct batadv_orig_node *orig_node, | |
242 | int max_if_num, int del_if_num) | |
243 | { | |
244 | size_t if_offset; | |
245 | void *data_ptr; | |
246 | ||
247 | lockdep_assert_held(&orig_node->bat_iv.ogm_cnt_lock); | |
d0015fdd | 248 | |
6b5e971a | 249 | data_ptr = kmalloc_array(max_if_num, sizeof(u8), GFP_ATOMIC); |
64ae7445 SE |
250 | if (!data_ptr) |
251 | /* use old buffer when new one could not be allocated */ | |
252 | data_ptr = orig_node->bat_iv.bcast_own_sum; | |
d0015fdd | 253 | |
64ae7445 SE |
254 | memmove(data_ptr, orig_node->bat_iv.bcast_own_sum, |
255 | del_if_num * sizeof(u8)); | |
d0015fdd | 256 | |
6b5e971a | 257 | if_offset = (del_if_num + 1) * sizeof(u8); |
64ae7445 SE |
258 | memmove((char *)data_ptr + del_if_num * sizeof(u8), |
259 | orig_node->bat_iv.bcast_own_sum + if_offset, | |
260 | (max_if_num - del_if_num) * sizeof(u8)); | |
261 | ||
262 | /* bcast_own_sum was shrunk down in new buffer; free old one */ | |
263 | if (orig_node->bat_iv.bcast_own_sum != data_ptr) { | |
264 | kfree(orig_node->bat_iv.bcast_own_sum); | |
265 | orig_node->bat_iv.bcast_own_sum = data_ptr; | |
266 | } | |
267 | } | |
d0015fdd | 268 | |
64ae7445 | 269 | /** |
7e9a8c2c SE |
270 | * batadv_iv_ogm_orig_del_if() - change the private structures of the orig_node |
271 | * to exclude the removed interface | |
64ae7445 SE |
272 | * @orig_node: the orig_node that has to be changed |
273 | * @max_if_num: the current amount of interfaces | |
274 | * @del_if_num: the index of the interface being removed | |
275 | * | |
276 | * Return: 0 on success, a negative error code otherwise. | |
277 | */ | |
278 | static int batadv_iv_ogm_orig_del_if(struct batadv_orig_node *orig_node, | |
279 | int max_if_num, int del_if_num) | |
280 | { | |
281 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
282 | ||
283 | if (max_if_num == 0) { | |
284 | kfree(orig_node->bat_iv.bcast_own); | |
285 | kfree(orig_node->bat_iv.bcast_own_sum); | |
286 | orig_node->bat_iv.bcast_own = NULL; | |
287 | orig_node->bat_iv.bcast_own_sum = NULL; | |
288 | } else { | |
289 | batadv_iv_ogm_drop_bcast_own_entry(orig_node, max_if_num, | |
290 | del_if_num); | |
291 | batadv_iv_ogm_drop_bcast_own_sum_entry(orig_node, max_if_num, | |
292 | del_if_num); | |
293 | } | |
d0015fdd | 294 | |
d0015fdd AQ |
295 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
296 | ||
64ae7445 | 297 | return 0; |
d0015fdd AQ |
298 | } |
299 | ||
bbad0a5e | 300 | /** |
7e9a8c2c SE |
301 | * batadv_iv_ogm_orig_get() - retrieve or create (if does not exist) an |
302 | * originator | |
bbad0a5e AQ |
303 | * @bat_priv: the bat priv with all the soft interface information |
304 | * @addr: mac address of the originator | |
305 | * | |
62fe710f | 306 | * Return: the originator object corresponding to the passed mac address or NULL |
bbad0a5e AQ |
307 | * on failure. |
308 | * If the object does not exists it is created an initialised. | |
309 | */ | |
310 | static struct batadv_orig_node * | |
6b5e971a | 311 | batadv_iv_ogm_orig_get(struct batadv_priv *bat_priv, const u8 *addr) |
bbad0a5e AQ |
312 | { |
313 | struct batadv_orig_node *orig_node; | |
314 | int size, hash_added; | |
315 | ||
316 | orig_node = batadv_orig_hash_find(bat_priv, addr); | |
317 | if (orig_node) | |
318 | return orig_node; | |
319 | ||
320 | orig_node = batadv_orig_node_new(bat_priv, addr); | |
321 | if (!orig_node) | |
322 | return NULL; | |
323 | ||
324 | spin_lock_init(&orig_node->bat_iv.ogm_cnt_lock); | |
325 | ||
326 | size = bat_priv->num_ifaces * sizeof(unsigned long) * BATADV_NUM_WORDS; | |
327 | orig_node->bat_iv.bcast_own = kzalloc(size, GFP_ATOMIC); | |
328 | if (!orig_node->bat_iv.bcast_own) | |
329 | goto free_orig_node; | |
330 | ||
6b5e971a | 331 | size = bat_priv->num_ifaces * sizeof(u8); |
bbad0a5e AQ |
332 | orig_node->bat_iv.bcast_own_sum = kzalloc(size, GFP_ATOMIC); |
333 | if (!orig_node->bat_iv.bcast_own_sum) | |
a5a5cb8c | 334 | goto free_orig_node; |
bbad0a5e | 335 | |
55db2d59 | 336 | kref_get(&orig_node->refcount); |
bbad0a5e AQ |
337 | hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig, |
338 | batadv_choose_orig, orig_node, | |
339 | &orig_node->hash_entry); | |
340 | if (hash_added != 0) | |
55db2d59 | 341 | goto free_orig_node_hash; |
bbad0a5e AQ |
342 | |
343 | return orig_node; | |
344 | ||
55db2d59 | 345 | free_orig_node_hash: |
5d967310 | 346 | batadv_orig_node_put(orig_node); |
55db2d59 | 347 | free_orig_node: |
5d967310 | 348 | batadv_orig_node_put(orig_node); |
bbad0a5e AQ |
349 | |
350 | return NULL; | |
351 | } | |
352 | ||
56303d34 SE |
353 | static struct batadv_neigh_node * |
354 | batadv_iv_ogm_neigh_new(struct batadv_hard_iface *hard_iface, | |
6b5e971a | 355 | const u8 *neigh_addr, |
56303d34 | 356 | struct batadv_orig_node *orig_node, |
863dd7a8 | 357 | struct batadv_orig_node *orig_neigh) |
7ae8b285 | 358 | { |
741aa06b | 359 | struct batadv_neigh_node *neigh_node; |
7ae8b285 | 360 | |
6f0a6b5e ML |
361 | neigh_node = batadv_neigh_node_get_or_create(orig_node, |
362 | hard_iface, neigh_addr); | |
7ae8b285 ML |
363 | if (!neigh_node) |
364 | goto out; | |
365 | ||
89652331 | 366 | neigh_node->orig_node = orig_neigh; |
7ae8b285 | 367 | |
7ae8b285 ML |
368 | out: |
369 | return neigh_node; | |
370 | } | |
371 | ||
56303d34 | 372 | static int batadv_iv_ogm_iface_enable(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 373 | { |
96412690 | 374 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 375 | unsigned char *ogm_buff; |
6b5e971a | 376 | u32 random_seqno; |
d7d32ec0 ML |
377 | |
378 | /* randomize initial seqno to avoid collision */ | |
379 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
14511519 | 380 | atomic_set(&hard_iface->bat_iv.ogm_seqno, random_seqno); |
d0b9fd89 | 381 | |
14511519 ML |
382 | hard_iface->bat_iv.ogm_buff_len = BATADV_OGM_HLEN; |
383 | ogm_buff = kmalloc(hard_iface->bat_iv.ogm_buff_len, GFP_ATOMIC); | |
384 | if (!ogm_buff) | |
42d9f2cb | 385 | return -ENOMEM; |
77af7575 | 386 | |
14511519 ML |
387 | hard_iface->bat_iv.ogm_buff = ogm_buff; |
388 | ||
389 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; | |
a40d9b07 SW |
390 | batadv_ogm_packet->packet_type = BATADV_IV_OGM; |
391 | batadv_ogm_packet->version = BATADV_COMPAT_VERSION; | |
392 | batadv_ogm_packet->ttl = 2; | |
96412690 | 393 | batadv_ogm_packet->flags = BATADV_NO_FLAGS; |
414254e3 | 394 | batadv_ogm_packet->reserved = 0; |
96412690 | 395 | batadv_ogm_packet->tq = BATADV_TQ_MAX_VALUE; |
77af7575 | 396 | |
42d9f2cb | 397 | return 0; |
d0b9fd89 ML |
398 | } |
399 | ||
56303d34 | 400 | static void batadv_iv_ogm_iface_disable(struct batadv_hard_iface *hard_iface) |
00a50076 | 401 | { |
14511519 ML |
402 | kfree(hard_iface->bat_iv.ogm_buff); |
403 | hard_iface->bat_iv.ogm_buff = NULL; | |
00a50076 ML |
404 | } |
405 | ||
56303d34 | 406 | static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 407 | { |
96412690 | 408 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 409 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 410 | |
14511519 | 411 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
8fdd0153 AQ |
412 | ether_addr_copy(batadv_ogm_packet->orig, |
413 | hard_iface->net_dev->dev_addr); | |
414 | ether_addr_copy(batadv_ogm_packet->prev_sender, | |
415 | hard_iface->net_dev->dev_addr); | |
d0b9fd89 ML |
416 | } |
417 | ||
56303d34 SE |
418 | static void |
419 | batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface) | |
d0b9fd89 | 420 | { |
96412690 | 421 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 422 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 423 | |
14511519 | 424 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
a40d9b07 | 425 | batadv_ogm_packet->ttl = BATADV_TTL; |
d0b9fd89 ML |
426 | } |
427 | ||
b9dacc52 | 428 | /* when do we schedule our own ogm to be sent */ |
fe8bc396 | 429 | static unsigned long |
56303d34 | 430 | batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv) |
b9dacc52 | 431 | { |
42d0b044 SE |
432 | unsigned int msecs; |
433 | ||
434 | msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER; | |
e76e4320 | 435 | msecs += prandom_u32() % (2 * BATADV_JITTER); |
42d0b044 SE |
436 | |
437 | return jiffies + msecs_to_jiffies(msecs); | |
b9dacc52 ML |
438 | } |
439 | ||
440 | /* when do we schedule a ogm packet to be sent */ | |
fe8bc396 | 441 | static unsigned long batadv_iv_ogm_fwd_send_time(void) |
b9dacc52 | 442 | { |
e76e4320 | 443 | return jiffies + msecs_to_jiffies(prandom_u32() % (BATADV_JITTER / 2)); |
b9dacc52 ML |
444 | } |
445 | ||
446 | /* apply hop penalty for a normal link */ | |
6b5e971a | 447 | static u8 batadv_hop_penalty(u8 tq, const struct batadv_priv *bat_priv) |
b9dacc52 ML |
448 | { |
449 | int hop_penalty = atomic_read(&bat_priv->hop_penalty); | |
42d0b044 SE |
450 | int new_tq; |
451 | ||
452 | new_tq = tq * (BATADV_TQ_MAX_VALUE - hop_penalty); | |
453 | new_tq /= BATADV_TQ_MAX_VALUE; | |
454 | ||
455 | return new_tq; | |
b9dacc52 ML |
456 | } |
457 | ||
600184b7 | 458 | /** |
7e9a8c2c | 459 | * batadv_iv_ogm_aggr_packet() - checks if there is another OGM attached |
600184b7 SW |
460 | * @buff_pos: current position in the skb |
461 | * @packet_len: total length of the skb | |
462 | * @tvlv_len: tvlv length of the previously considered OGM | |
463 | * | |
464 | * Return: true if there is enough space for another OGM, false otherwise. | |
465 | */ | |
9fd9b19e MP |
466 | static bool batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len, |
467 | __be16 tvlv_len) | |
fc957275 | 468 | { |
08c36d3e SE |
469 | int next_buff_pos = 0; |
470 | ||
7e071c79 | 471 | next_buff_pos += buff_pos + BATADV_OGM_HLEN; |
ef261577 | 472 | next_buff_pos += ntohs(tvlv_len); |
fc957275 ML |
473 | |
474 | return (next_buff_pos <= packet_len) && | |
42d0b044 | 475 | (next_buff_pos <= BATADV_MAX_AGGREGATION_BYTES); |
fc957275 ML |
476 | } |
477 | ||
b9dacc52 | 478 | /* send a batman ogm to a given interface */ |
56303d34 SE |
479 | static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, |
480 | struct batadv_hard_iface *hard_iface) | |
b9dacc52 | 481 | { |
56303d34 | 482 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
de12baec | 483 | const char *fwd_str; |
6b5e971a SE |
484 | u8 packet_num; |
485 | s16 buff_pos; | |
96412690 | 486 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 487 | struct sk_buff *skb; |
6b5e971a | 488 | u8 *packet_pos; |
b9dacc52 | 489 | |
e9a4f295 | 490 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
b9dacc52 ML |
491 | return; |
492 | ||
493 | packet_num = 0; | |
494 | buff_pos = 0; | |
c67893d1 SE |
495 | packet_pos = forw_packet->skb->data; |
496 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
497 | |
498 | /* adjust all flags and log packets */ | |
fe8bc396 | 499 | while (batadv_iv_ogm_aggr_packet(buff_pos, forw_packet->packet_len, |
ef261577 | 500 | batadv_ogm_packet->tvlv_len)) { |
b9dacc52 | 501 | /* we might have aggregated direct link packets with an |
9cfc7bd6 SE |
502 | * ordinary base packet |
503 | */ | |
8de47de5 SE |
504 | if (forw_packet->direct_link_flags & BIT(packet_num) && |
505 | forw_packet->if_incoming == hard_iface) | |
96412690 | 506 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 507 | else |
96412690 | 508 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 509 | |
c67893d1 SE |
510 | if (packet_num > 0 || !forw_packet->own) |
511 | fwd_str = "Forwarding"; | |
512 | else | |
513 | fwd_str = "Sending own"; | |
514 | ||
39c75a51 | 515 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
e1bf0c14 | 516 | "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s) on interface %s [%pM]\n", |
1eda58bf | 517 | fwd_str, (packet_num > 0 ? "aggregated " : ""), |
96412690 SE |
518 | batadv_ogm_packet->orig, |
519 | ntohl(batadv_ogm_packet->seqno), | |
a40d9b07 | 520 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl, |
a2f2b6cd | 521 | ((batadv_ogm_packet->flags & BATADV_DIRECTLINK) ? |
1eda58bf | 522 | "on" : "off"), |
e1bf0c14 | 523 | hard_iface->net_dev->name, |
1eda58bf | 524 | hard_iface->net_dev->dev_addr); |
b9dacc52 | 525 | |
7e071c79 | 526 | buff_pos += BATADV_OGM_HLEN; |
ef261577 | 527 | buff_pos += ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 528 | packet_num++; |
c67893d1 SE |
529 | packet_pos = forw_packet->skb->data + buff_pos; |
530 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
531 | } |
532 | ||
533 | /* create clone because function is called more than once */ | |
534 | skb = skb_clone(forw_packet->skb, GFP_ATOMIC); | |
f8214865 | 535 | if (skb) { |
d69909d2 SE |
536 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_TX); |
537 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_TX_BYTES, | |
f8214865 | 538 | skb->len + ETH_HLEN); |
95d39278 | 539 | batadv_send_broadcast_skb(skb, hard_iface); |
f8214865 | 540 | } |
b9dacc52 ML |
541 | } |
542 | ||
543 | /* send a batman ogm packet */ | |
56303d34 | 544 | static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) |
b9dacc52 | 545 | { |
b9dacc52 | 546 | struct net_device *soft_iface; |
b9dacc52 ML |
547 | |
548 | if (!forw_packet->if_incoming) { | |
86ceb360 | 549 | pr_err("Error - can't forward packet: incoming iface not specified\n"); |
f55a2e84 | 550 | return; |
b9dacc52 ML |
551 | } |
552 | ||
553 | soft_iface = forw_packet->if_incoming->soft_iface; | |
b9dacc52 | 554 | |
ef0a937f | 555 | if (WARN_ON(!forw_packet->if_outgoing)) |
f55a2e84 | 556 | return; |
b9dacc52 | 557 | |
ef0a937f | 558 | if (WARN_ON(forw_packet->if_outgoing->soft_iface != soft_iface)) |
f55a2e84 | 559 | return; |
b9dacc52 | 560 | |
ef0a937f | 561 | if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) |
f55a2e84 | 562 | return; |
b9dacc52 | 563 | |
ef0a937f SW |
564 | /* only for one specific outgoing interface */ |
565 | batadv_iv_ogm_send_to_if(forw_packet, forw_packet->if_outgoing); | |
b9dacc52 ML |
566 | } |
567 | ||
ef0a937f | 568 | /** |
7e9a8c2c | 569 | * batadv_iv_ogm_can_aggregate() - find out if an OGM can be aggregated on an |
ef0a937f SW |
570 | * existing forward packet |
571 | * @new_bat_ogm_packet: OGM packet to be aggregated | |
572 | * @bat_priv: the bat priv with all the soft interface information | |
573 | * @packet_len: (total) length of the OGM | |
574 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
95298a91 | 575 | * @directlink: true if this is a direct link packet |
ef0a937f SW |
576 | * @if_incoming: interface where the packet was received |
577 | * @if_outgoing: interface for which the retransmission should be considered | |
578 | * @forw_packet: the forwarded packet which should be checked | |
579 | * | |
62fe710f | 580 | * Return: true if new_packet can be aggregated with forw_packet |
ef0a937f | 581 | */ |
fe8bc396 | 582 | static bool |
96412690 | 583 | batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, |
56303d34 | 584 | struct batadv_priv *bat_priv, |
fe8bc396 SE |
585 | int packet_len, unsigned long send_time, |
586 | bool directlink, | |
56303d34 | 587 | const struct batadv_hard_iface *if_incoming, |
ef0a937f | 588 | const struct batadv_hard_iface *if_outgoing, |
56303d34 | 589 | const struct batadv_forw_packet *forw_packet) |
b9dacc52 | 590 | { |
96412690 | 591 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 592 | int aggregated_bytes = forw_packet->packet_len + packet_len; |
56303d34 | 593 | struct batadv_hard_iface *primary_if = NULL; |
b9dacc52 | 594 | bool res = false; |
42d0b044 | 595 | unsigned long aggregation_end_time; |
b9dacc52 | 596 | |
96412690 | 597 | batadv_ogm_packet = (struct batadv_ogm_packet *)forw_packet->skb->data; |
42d0b044 SE |
598 | aggregation_end_time = send_time; |
599 | aggregation_end_time += msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); | |
b9dacc52 | 600 | |
9cfc7bd6 | 601 | /* we can aggregate the current packet to this aggregated packet |
b9dacc52 ML |
602 | * if: |
603 | * | |
604 | * - the send time is within our MAX_AGGREGATION_MS time | |
605 | * - the resulting packet wont be bigger than | |
606 | * MAX_AGGREGATION_BYTES | |
8f34b388 | 607 | * otherwise aggregation is not possible |
b9dacc52 | 608 | */ |
8f34b388 MP |
609 | if (!time_before(send_time, forw_packet->send_time) || |
610 | !time_after_eq(aggregation_end_time, forw_packet->send_time)) | |
611 | return false; | |
612 | ||
613 | if (aggregated_bytes > BATADV_MAX_AGGREGATION_BYTES) | |
614 | return false; | |
615 | ||
616 | /* packet is not leaving on the same interface. */ | |
617 | if (forw_packet->if_outgoing != if_outgoing) | |
618 | return false; | |
619 | ||
620 | /* check aggregation compatibility | |
621 | * -> direct link packets are broadcasted on | |
622 | * their interface only | |
623 | * -> aggregate packet if the current packet is | |
624 | * a "global" packet as well as the base | |
625 | * packet | |
626 | */ | |
627 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
628 | if (!primary_if) | |
629 | return false; | |
ef0a937f | 630 | |
8f34b388 MP |
631 | /* packets without direct link flag and high TTL |
632 | * are flooded through the net | |
633 | */ | |
634 | if (!directlink && | |
635 | !(batadv_ogm_packet->flags & BATADV_DIRECTLINK) && | |
636 | batadv_ogm_packet->ttl != 1 && | |
637 | ||
638 | /* own packets originating non-primary | |
639 | * interfaces leave only that interface | |
640 | */ | |
641 | (!forw_packet->own || | |
642 | forw_packet->if_incoming == primary_if)) { | |
643 | res = true; | |
644 | goto out; | |
645 | } | |
b9dacc52 | 646 | |
8f34b388 MP |
647 | /* if the incoming packet is sent via this one |
648 | * interface only - we still can aggregate | |
649 | */ | |
650 | if (directlink && | |
651 | new_bat_ogm_packet->ttl == 1 && | |
652 | forw_packet->if_incoming == if_incoming && | |
653 | ||
654 | /* packets from direct neighbors or | |
655 | * own secondary interface packets | |
656 | * (= secondary interface packets in general) | |
657 | */ | |
658 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK || | |
659 | (forw_packet->own && | |
660 | forw_packet->if_incoming != primary_if))) { | |
661 | res = true; | |
662 | goto out; | |
b9dacc52 ML |
663 | } |
664 | ||
665 | out: | |
666 | if (primary_if) | |
82047ad7 | 667 | batadv_hardif_put(primary_if); |
b9dacc52 ML |
668 | return res; |
669 | } | |
670 | ||
1b371d13 | 671 | /** |
7e9a8c2c | 672 | * batadv_iv_ogm_aggregate_new() - create a new aggregated packet and add this |
ef0a937f SW |
673 | * packet to it. |
674 | * @packet_buff: pointer to the OGM | |
675 | * @packet_len: (total) length of the OGM | |
676 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
677 | * @direct_link: whether this OGM has direct link status | |
678 | * @if_incoming: interface where the packet was received | |
679 | * @if_outgoing: interface for which the retransmission should be considered | |
680 | * @own_packet: true if it is a self-generated ogm | |
681 | */ | |
fe8bc396 SE |
682 | static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, |
683 | int packet_len, unsigned long send_time, | |
684 | bool direct_link, | |
56303d34 | 685 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 686 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 687 | int own_packet) |
b9dacc52 | 688 | { |
56303d34 SE |
689 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
690 | struct batadv_forw_packet *forw_packet_aggr; | |
99ba18ef | 691 | struct sk_buff *skb; |
b9dacc52 | 692 | unsigned char *skb_buff; |
42d0b044 | 693 | unsigned int skb_size; |
a65e5481 | 694 | atomic_t *queue_left = own_packet ? NULL : &bat_priv->batman_queue_left; |
b9dacc52 | 695 | |
940d156f MP |
696 | if (atomic_read(&bat_priv->aggregated_ogms) && |
697 | packet_len < BATADV_MAX_AGGREGATION_BYTES) | |
5b246574 | 698 | skb_size = BATADV_MAX_AGGREGATION_BYTES; |
b9dacc52 | 699 | else |
5b246574 SE |
700 | skb_size = packet_len; |
701 | ||
41ab6c48 | 702 | skb_size += ETH_HLEN; |
b9dacc52 | 703 | |
99ba18ef LL |
704 | skb = netdev_alloc_skb_ip_align(NULL, skb_size); |
705 | if (!skb) | |
706 | return; | |
707 | ||
708 | forw_packet_aggr = batadv_forw_packet_alloc(if_incoming, if_outgoing, | |
709 | queue_left, bat_priv, skb); | |
710 | if (!forw_packet_aggr) { | |
711 | kfree_skb(skb); | |
a65e5481 LL |
712 | return; |
713 | } | |
714 | ||
c54f38c9 | 715 | forw_packet_aggr->skb->priority = TC_PRIO_CONTROL; |
41ab6c48 | 716 | skb_reserve(forw_packet_aggr->skb, ETH_HLEN); |
b9dacc52 | 717 | |
b9dacc52 ML |
718 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); |
719 | forw_packet_aggr->packet_len = packet_len; | |
720 | memcpy(skb_buff, packet_buff, packet_len); | |
721 | ||
722 | forw_packet_aggr->own = own_packet; | |
42d0b044 | 723 | forw_packet_aggr->direct_link_flags = BATADV_NO_FLAGS; |
b9dacc52 ML |
724 | forw_packet_aggr->send_time = send_time; |
725 | ||
726 | /* save packet direct link flag status */ | |
727 | if (direct_link) | |
728 | forw_packet_aggr->direct_link_flags |= 1; | |
729 | ||
b9dacc52 | 730 | INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work, |
f0d97253 | 731 | batadv_iv_send_outstanding_bat_ogm_packet); |
9b4aec64 LL |
732 | |
733 | batadv_forw_packet_ogmv1_queue(bat_priv, forw_packet_aggr, send_time); | |
b9dacc52 ML |
734 | } |
735 | ||
736 | /* aggregate a new packet into the existing ogm packet */ | |
56303d34 | 737 | static void batadv_iv_ogm_aggregate(struct batadv_forw_packet *forw_packet_aggr, |
fe8bc396 SE |
738 | const unsigned char *packet_buff, |
739 | int packet_len, bool direct_link) | |
b9dacc52 | 740 | { |
8de47de5 | 741 | unsigned long new_direct_link_flag; |
b9dacc52 | 742 | |
e04de486 | 743 | skb_put_data(forw_packet_aggr->skb, packet_buff, packet_len); |
b9dacc52 ML |
744 | forw_packet_aggr->packet_len += packet_len; |
745 | forw_packet_aggr->num_packets++; | |
746 | ||
747 | /* save packet direct link flag status */ | |
8de47de5 SE |
748 | if (direct_link) { |
749 | new_direct_link_flag = BIT(forw_packet_aggr->num_packets); | |
750 | forw_packet_aggr->direct_link_flags |= new_direct_link_flag; | |
751 | } | |
b9dacc52 ML |
752 | } |
753 | ||
ef0a937f | 754 | /** |
7e9a8c2c | 755 | * batadv_iv_ogm_queue_add() - queue up an OGM for transmission |
ef0a937f SW |
756 | * @bat_priv: the bat priv with all the soft interface information |
757 | * @packet_buff: pointer to the OGM | |
758 | * @packet_len: (total) length of the OGM | |
759 | * @if_incoming: interface where the packet was received | |
760 | * @if_outgoing: interface for which the retransmission should be considered | |
761 | * @own_packet: true if it is a self-generated ogm | |
762 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
763 | */ | |
56303d34 | 764 | static void batadv_iv_ogm_queue_add(struct batadv_priv *bat_priv, |
fe8bc396 SE |
765 | unsigned char *packet_buff, |
766 | int packet_len, | |
56303d34 | 767 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 768 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 769 | int own_packet, unsigned long send_time) |
b9dacc52 | 770 | { |
9cfc7bd6 | 771 | /* _aggr -> pointer to the packet we want to aggregate with |
b9dacc52 ML |
772 | * _pos -> pointer to the position in the queue |
773 | */ | |
56303d34 SE |
774 | struct batadv_forw_packet *forw_packet_aggr = NULL; |
775 | struct batadv_forw_packet *forw_packet_pos = NULL; | |
96412690 | 776 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 777 | bool direct_link; |
42d0b044 | 778 | unsigned long max_aggregation_jiffies; |
b9dacc52 | 779 | |
96412690 | 780 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
56489151 | 781 | direct_link = !!(batadv_ogm_packet->flags & BATADV_DIRECTLINK); |
42d0b044 | 782 | max_aggregation_jiffies = msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); |
b9dacc52 ML |
783 | |
784 | /* find position for the packet in the forward queue */ | |
785 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
786 | /* own packets are not to be aggregated */ | |
56489151 | 787 | if (atomic_read(&bat_priv->aggregated_ogms) && !own_packet) { |
b67bfe0d | 788 | hlist_for_each_entry(forw_packet_pos, |
b9dacc52 | 789 | &bat_priv->forw_bat_list, list) { |
96412690 | 790 | if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet, |
fe8bc396 SE |
791 | bat_priv, packet_len, |
792 | send_time, direct_link, | |
793 | if_incoming, | |
ef0a937f | 794 | if_outgoing, |
fe8bc396 | 795 | forw_packet_pos)) { |
b9dacc52 ML |
796 | forw_packet_aggr = forw_packet_pos; |
797 | break; | |
798 | } | |
799 | } | |
800 | } | |
801 | ||
802 | /* nothing to aggregate with - either aggregation disabled or no | |
9cfc7bd6 SE |
803 | * suitable aggregation packet found |
804 | */ | |
b9dacc52 ML |
805 | if (!forw_packet_aggr) { |
806 | /* the following section can run without the lock */ | |
807 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
808 | ||
9cfc7bd6 | 809 | /* if we could not aggregate this packet with one of the others |
b9dacc52 ML |
810 | * we hold it back for a while, so that it might be aggregated |
811 | * later on | |
812 | */ | |
42d0b044 SE |
813 | if (!own_packet && atomic_read(&bat_priv->aggregated_ogms)) |
814 | send_time += max_aggregation_jiffies; | |
b9dacc52 | 815 | |
fe8bc396 SE |
816 | batadv_iv_ogm_aggregate_new(packet_buff, packet_len, |
817 | send_time, direct_link, | |
ef0a937f SW |
818 | if_incoming, if_outgoing, |
819 | own_packet); | |
b9dacc52 | 820 | } else { |
fe8bc396 SE |
821 | batadv_iv_ogm_aggregate(forw_packet_aggr, packet_buff, |
822 | packet_len, direct_link); | |
b9dacc52 ML |
823 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
824 | } | |
825 | } | |
826 | ||
56303d34 | 827 | static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, |
fe8bc396 | 828 | const struct ethhdr *ethhdr, |
96412690 | 829 | struct batadv_ogm_packet *batadv_ogm_packet, |
fe8bc396 SE |
830 | bool is_single_hop_neigh, |
831 | bool is_from_best_next_hop, | |
ef0a937f SW |
832 | struct batadv_hard_iface *if_incoming, |
833 | struct batadv_hard_iface *if_outgoing) | |
b9dacc52 | 834 | { |
56303d34 | 835 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
6b5e971a | 836 | u16 tvlv_len; |
b9dacc52 | 837 | |
a40d9b07 | 838 | if (batadv_ogm_packet->ttl <= 1) { |
39c75a51 | 839 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n"); |
b9dacc52 ML |
840 | return; |
841 | } | |
842 | ||
13b2541b ML |
843 | if (!is_from_best_next_hop) { |
844 | /* Mark the forwarded packet when it is not coming from our | |
845 | * best next hop. We still need to forward the packet for our | |
846 | * neighbor link quality detection to work in case the packet | |
847 | * originated from a single hop neighbor. Otherwise we can | |
848 | * simply drop the ogm. | |
849 | */ | |
850 | if (is_single_hop_neigh) | |
96412690 | 851 | batadv_ogm_packet->flags |= BATADV_NOT_BEST_NEXT_HOP; |
13b2541b ML |
852 | else |
853 | return; | |
854 | } | |
b9dacc52 | 855 | |
ef261577 | 856 | tvlv_len = ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 857 | |
a40d9b07 | 858 | batadv_ogm_packet->ttl--; |
8fdd0153 | 859 | ether_addr_copy(batadv_ogm_packet->prev_sender, ethhdr->h_source); |
b9dacc52 | 860 | |
b9dacc52 | 861 | /* apply hop penalty */ |
96412690 | 862 | batadv_ogm_packet->tq = batadv_hop_penalty(batadv_ogm_packet->tq, |
fe8bc396 | 863 | bat_priv); |
b9dacc52 | 864 | |
39c75a51 | 865 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 866 | "Forwarding packet: tq: %i, ttl: %i\n", |
a40d9b07 | 867 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl); |
b9dacc52 | 868 | |
75cd33f8 | 869 | if (is_single_hop_neigh) |
96412690 | 870 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 871 | else |
96412690 | 872 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 873 | |
96412690 | 874 | batadv_iv_ogm_queue_add(bat_priv, (unsigned char *)batadv_ogm_packet, |
ef261577 | 875 | BATADV_OGM_HLEN + tvlv_len, |
ef0a937f SW |
876 | if_incoming, if_outgoing, 0, |
877 | batadv_iv_ogm_fwd_send_time()); | |
b9dacc52 ML |
878 | } |
879 | ||
d9896617 | 880 | /** |
7e9a8c2c SE |
881 | * batadv_iv_ogm_slide_own_bcast_window() - bitshift own OGM broadcast windows |
882 | * for the given interface | |
d9896617 AQ |
883 | * @hard_iface: the interface for which the windows have to be shifted |
884 | */ | |
885 | static void | |
886 | batadv_iv_ogm_slide_own_bcast_window(struct batadv_hard_iface *hard_iface) | |
887 | { | |
888 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); | |
889 | struct batadv_hashtable *hash = bat_priv->orig_hash; | |
890 | struct hlist_head *head; | |
891 | struct batadv_orig_node *orig_node; | |
892 | unsigned long *word; | |
6b5e971a | 893 | u32 i; |
d9896617 | 894 | size_t word_index; |
6b5e971a | 895 | u8 *w; |
bbad0a5e | 896 | int if_num; |
d9896617 AQ |
897 | |
898 | for (i = 0; i < hash->size; i++) { | |
899 | head = &hash->table[i]; | |
900 | ||
901 | rcu_read_lock(); | |
902 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
bbad0a5e | 903 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
d9896617 | 904 | word_index = hard_iface->if_num * BATADV_NUM_WORDS; |
32db6aaa | 905 | word = &orig_node->bat_iv.bcast_own[word_index]; |
d9896617 AQ |
906 | |
907 | batadv_bit_get_packet(bat_priv, word, 1, 0); | |
bbad0a5e AQ |
908 | if_num = hard_iface->if_num; |
909 | w = &orig_node->bat_iv.bcast_own_sum[if_num]; | |
d9896617 | 910 | *w = bitmap_weight(word, BATADV_TQ_LOCAL_WINDOW_SIZE); |
bbad0a5e | 911 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
d9896617 AQ |
912 | } |
913 | rcu_read_unlock(); | |
914 | } | |
915 | } | |
916 | ||
56303d34 | 917 | static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) |
b9dacc52 | 918 | { |
56303d34 | 919 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
14511519 | 920 | unsigned char **ogm_buff = &hard_iface->bat_iv.ogm_buff; |
96412690 | 921 | struct batadv_ogm_packet *batadv_ogm_packet; |
ef0a937f | 922 | struct batadv_hard_iface *primary_if, *tmp_hard_iface; |
14511519 | 923 | int *ogm_buff_len = &hard_iface->bat_iv.ogm_buff_len; |
6b5e971a SE |
924 | u32 seqno; |
925 | u16 tvlv_len = 0; | |
ef0a937f | 926 | unsigned long send_time; |
b9dacc52 | 927 | |
825ffe1f SE |
928 | if (hard_iface->if_status == BATADV_IF_NOT_IN_USE || |
929 | hard_iface->if_status == BATADV_IF_TO_BE_REMOVED) | |
f0d97253 AQ |
930 | return; |
931 | ||
932 | /* the interface gets activated here to avoid race conditions between | |
933 | * the moment of activating the interface in | |
934 | * hardif_activate_interface() where the originator mac is set and | |
935 | * outdated packets (especially uninitialized mac addresses) in the | |
936 | * packet queue | |
937 | */ | |
938 | if (hard_iface->if_status == BATADV_IF_TO_BE_ACTIVATED) | |
939 | hard_iface->if_status = BATADV_IF_ACTIVE; | |
940 | ||
e5d89254 | 941 | primary_if = batadv_primary_if_get_selected(bat_priv); |
b9dacc52 | 942 | |
e1bf0c14 ML |
943 | if (hard_iface == primary_if) { |
944 | /* tt changes have to be committed before the tvlv data is | |
945 | * appended as it may alter the tt tvlv container | |
946 | */ | |
947 | batadv_tt_local_commit_changes(bat_priv); | |
ef261577 ML |
948 | tvlv_len = batadv_tvlv_container_ogm_append(bat_priv, ogm_buff, |
949 | ogm_buff_len, | |
950 | BATADV_OGM_HLEN); | |
e1bf0c14 | 951 | } |
be9aa4c1 | 952 | |
14511519 | 953 | batadv_ogm_packet = (struct batadv_ogm_packet *)(*ogm_buff); |
ef261577 | 954 | batadv_ogm_packet->tvlv_len = htons(tvlv_len); |
b9dacc52 ML |
955 | |
956 | /* change sequence number to network order */ | |
6b5e971a | 957 | seqno = (u32)atomic_read(&hard_iface->bat_iv.ogm_seqno); |
bbb1f90e | 958 | batadv_ogm_packet->seqno = htonl(seqno); |
14511519 | 959 | atomic_inc(&hard_iface->bat_iv.ogm_seqno); |
b9dacc52 | 960 | |
d9896617 | 961 | batadv_iv_ogm_slide_own_bcast_window(hard_iface); |
b9dacc52 | 962 | |
ef0a937f SW |
963 | send_time = batadv_iv_ogm_emit_send_time(bat_priv); |
964 | ||
965 | if (hard_iface != primary_if) { | |
966 | /* OGMs from secondary interfaces are only scheduled on their | |
967 | * respective interfaces. | |
968 | */ | |
969 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, *ogm_buff_len, | |
970 | hard_iface, hard_iface, 1, send_time); | |
971 | goto out; | |
972 | } | |
973 | ||
974 | /* OGMs from primary interfaces are scheduled on all | |
975 | * interfaces. | |
976 | */ | |
977 | rcu_read_lock(); | |
978 | list_for_each_entry_rcu(tmp_hard_iface, &batadv_hardif_list, list) { | |
979 | if (tmp_hard_iface->soft_iface != hard_iface->soft_iface) | |
87b40f53 | 980 | continue; |
27353446 SE |
981 | |
982 | if (!kref_get_unless_zero(&tmp_hard_iface->refcount)) | |
983 | continue; | |
984 | ||
ef0a937f SW |
985 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, |
986 | *ogm_buff_len, hard_iface, | |
987 | tmp_hard_iface, 1, send_time); | |
27353446 SE |
988 | |
989 | batadv_hardif_put(tmp_hard_iface); | |
ef0a937f SW |
990 | } |
991 | rcu_read_unlock(); | |
992 | ||
993 | out: | |
b9dacc52 | 994 | if (primary_if) |
82047ad7 | 995 | batadv_hardif_put(primary_if); |
b9dacc52 ML |
996 | } |
997 | ||
89652331 | 998 | /** |
7e9a8c2c | 999 | * batadv_iv_ogm_orig_update() - use OGM to update corresponding data in an |
89652331 SW |
1000 | * originator |
1001 | * @bat_priv: the bat priv with all the soft interface information | |
1002 | * @orig_node: the orig node who originally emitted the ogm packet | |
7351a482 | 1003 | * @orig_ifinfo: ifinfo for the outgoing interface of the orig_node |
89652331 SW |
1004 | * @ethhdr: Ethernet header of the OGM |
1005 | * @batadv_ogm_packet: the ogm packet | |
1006 | * @if_incoming: interface where the packet was received | |
1007 | * @if_outgoing: interface for which the retransmission should be considered | |
89652331 SW |
1008 | * @dup_status: the duplicate status of this ogm packet. |
1009 | */ | |
fe8bc396 | 1010 | static void |
56303d34 SE |
1011 | batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, |
1012 | struct batadv_orig_node *orig_node, | |
7351a482 | 1013 | struct batadv_orig_ifinfo *orig_ifinfo, |
fe8bc396 | 1014 | const struct ethhdr *ethhdr, |
96412690 | 1015 | const struct batadv_ogm_packet *batadv_ogm_packet, |
56303d34 | 1016 | struct batadv_hard_iface *if_incoming, |
89652331 | 1017 | struct batadv_hard_iface *if_outgoing, |
7c24bbbe | 1018 | enum batadv_dup_status dup_status) |
fc957275 | 1019 | { |
89652331 SW |
1020 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL; |
1021 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; | |
4f248cff SE |
1022 | struct batadv_neigh_node *neigh_node = NULL; |
1023 | struct batadv_neigh_node *tmp_neigh_node = NULL; | |
56303d34 SE |
1024 | struct batadv_neigh_node *router = NULL; |
1025 | struct batadv_orig_node *orig_node_tmp; | |
7caf69fb | 1026 | int if_num; |
6b5e971a SE |
1027 | u8 sum_orig, sum_neigh; |
1028 | u8 *neigh_addr; | |
1029 | u8 tq_avg; | |
fc957275 | 1030 | |
39c75a51 | 1031 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
22f0502e SE |
1032 | "%s(): Searching and updating originator entry of received packet\n", |
1033 | __func__); | |
fc957275 ML |
1034 | |
1035 | rcu_read_lock(); | |
b67bfe0d | 1036 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 1037 | &orig_node->neigh_list, list) { |
1eda58bf SE |
1038 | neigh_addr = tmp_neigh_node->addr; |
1039 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && | |
1040 | tmp_neigh_node->if_incoming == if_incoming && | |
77ae32e8 | 1041 | kref_get_unless_zero(&tmp_neigh_node->refcount)) { |
38dc40ef | 1042 | if (WARN(neigh_node, "too many matching neigh_nodes")) |
25bb2509 | 1043 | batadv_neigh_node_put(neigh_node); |
fc957275 ML |
1044 | neigh_node = tmp_neigh_node; |
1045 | continue; | |
1046 | } | |
1047 | ||
7c24bbbe | 1048 | if (dup_status != BATADV_NO_DUP) |
fc957275 ML |
1049 | continue; |
1050 | ||
89652331 SW |
1051 | /* only update the entry for this outgoing interface */ |
1052 | neigh_ifinfo = batadv_neigh_ifinfo_get(tmp_neigh_node, | |
1053 | if_outgoing); | |
1054 | if (!neigh_ifinfo) | |
1055 | continue; | |
1056 | ||
1057 | spin_lock_bh(&tmp_neigh_node->ifinfo_lock); | |
1058 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
1059 | &neigh_ifinfo->bat_iv.tq_index, 0); | |
1060 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); | |
1061 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
1062 | spin_unlock_bh(&tmp_neigh_node->ifinfo_lock); | |
1063 | ||
044fa3ae | 1064 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 | 1065 | neigh_ifinfo = NULL; |
fc957275 ML |
1066 | } |
1067 | ||
1068 | if (!neigh_node) { | |
56303d34 | 1069 | struct batadv_orig_node *orig_tmp; |
fc957275 | 1070 | |
bbad0a5e | 1071 | orig_tmp = batadv_iv_ogm_orig_get(bat_priv, ethhdr->h_source); |
fc957275 ML |
1072 | if (!orig_tmp) |
1073 | goto unlock; | |
1074 | ||
fe8bc396 SE |
1075 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
1076 | ethhdr->h_source, | |
863dd7a8 | 1077 | orig_node, orig_tmp); |
fc957275 | 1078 | |
5d967310 | 1079 | batadv_orig_node_put(orig_tmp); |
fc957275 ML |
1080 | if (!neigh_node) |
1081 | goto unlock; | |
23badd6d | 1082 | } else { |
39c75a51 | 1083 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1084 | "Updating existing last-hop neighbor of originator\n"); |
23badd6d | 1085 | } |
fc957275 ML |
1086 | |
1087 | rcu_read_unlock(); | |
89652331 SW |
1088 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
1089 | if (!neigh_ifinfo) | |
1090 | goto out; | |
fc957275 | 1091 | |
d7b2a97e | 1092 | neigh_node->last_seen = jiffies; |
fc957275 | 1093 | |
89652331 SW |
1094 | spin_lock_bh(&neigh_node->ifinfo_lock); |
1095 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
1096 | &neigh_ifinfo->bat_iv.tq_index, | |
96412690 | 1097 | batadv_ogm_packet->tq); |
89652331 SW |
1098 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); |
1099 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
1100 | spin_unlock_bh(&neigh_node->ifinfo_lock); | |
fc957275 | 1101 | |
7c24bbbe | 1102 | if (dup_status == BATADV_NO_DUP) { |
7351a482 | 1103 | orig_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
89652331 | 1104 | neigh_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
fc957275 ML |
1105 | } |
1106 | ||
fc957275 | 1107 | /* if this neighbor already is our next hop there is nothing |
9cfc7bd6 SE |
1108 | * to change |
1109 | */ | |
7351a482 | 1110 | router = batadv_orig_router_get(orig_node, if_outgoing); |
fc957275 | 1111 | if (router == neigh_node) |
e1bf0c14 | 1112 | goto out; |
fc957275 | 1113 | |
89652331 SW |
1114 | if (router) { |
1115 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
1116 | if (!router_ifinfo) | |
1117 | goto out; | |
1118 | ||
1119 | /* if this neighbor does not offer a better TQ we won't | |
1120 | * consider it | |
1121 | */ | |
1122 | if (router_ifinfo->bat_iv.tq_avg > neigh_ifinfo->bat_iv.tq_avg) | |
1123 | goto out; | |
1124 | } | |
fc957275 ML |
1125 | |
1126 | /* if the TQ is the same and the link not more symmetric we | |
9cfc7bd6 SE |
1127 | * won't consider it either |
1128 | */ | |
89652331 | 1129 | if (router_ifinfo && |
01b97a3e | 1130 | neigh_ifinfo->bat_iv.tq_avg == router_ifinfo->bat_iv.tq_avg) { |
fc957275 | 1131 | orig_node_tmp = router->orig_node; |
bbad0a5e | 1132 | spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
7caf69fb | 1133 | if_num = router->if_incoming->if_num; |
bbad0a5e AQ |
1134 | sum_orig = orig_node_tmp->bat_iv.bcast_own_sum[if_num]; |
1135 | spin_unlock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); | |
fc957275 ML |
1136 | |
1137 | orig_node_tmp = neigh_node->orig_node; | |
bbad0a5e | 1138 | spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
7caf69fb | 1139 | if_num = neigh_node->if_incoming->if_num; |
bbad0a5e AQ |
1140 | sum_neigh = orig_node_tmp->bat_iv.bcast_own_sum[if_num]; |
1141 | spin_unlock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); | |
fc957275 | 1142 | |
bbb1f90e | 1143 | if (sum_orig >= sum_neigh) |
e1bf0c14 | 1144 | goto out; |
fc957275 ML |
1145 | } |
1146 | ||
7351a482 | 1147 | batadv_update_route(bat_priv, orig_node, if_outgoing, neigh_node); |
fc957275 ML |
1148 | goto out; |
1149 | ||
1150 | unlock: | |
1151 | rcu_read_unlock(); | |
1152 | out: | |
1153 | if (neigh_node) | |
25bb2509 | 1154 | batadv_neigh_node_put(neigh_node); |
fc957275 | 1155 | if (router) |
25bb2509 | 1156 | batadv_neigh_node_put(router); |
89652331 | 1157 | if (neigh_ifinfo) |
044fa3ae | 1158 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 | 1159 | if (router_ifinfo) |
044fa3ae | 1160 | batadv_neigh_ifinfo_put(router_ifinfo); |
fc957275 ML |
1161 | } |
1162 | ||
89652331 | 1163 | /** |
7e9a8c2c | 1164 | * batadv_iv_ogm_calc_tq() - calculate tq for current received ogm packet |
89652331 SW |
1165 | * @orig_node: the orig node who originally emitted the ogm packet |
1166 | * @orig_neigh_node: the orig node struct of the neighbor who sent the packet | |
1167 | * @batadv_ogm_packet: the ogm packet | |
1168 | * @if_incoming: interface where the packet was received | |
1169 | * @if_outgoing: interface for which the retransmission should be considered | |
1170 | * | |
4b426b10 | 1171 | * Return: true if the link can be considered bidirectional, false otherwise |
89652331 | 1172 | */ |
4b426b10 SE |
1173 | static bool batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, |
1174 | struct batadv_orig_node *orig_neigh_node, | |
1175 | struct batadv_ogm_packet *batadv_ogm_packet, | |
1176 | struct batadv_hard_iface *if_incoming, | |
1177 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1178 | { |
56303d34 SE |
1179 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1180 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node; | |
89652331 | 1181 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
6b5e971a SE |
1182 | u8 total_count; |
1183 | u8 orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own; | |
42d0b044 | 1184 | unsigned int neigh_rq_inv_cube, neigh_rq_max_cube; |
d285f52c SE |
1185 | int if_num; |
1186 | unsigned int tq_asym_penalty, inv_asym_penalty; | |
42d0b044 | 1187 | unsigned int combined_tq; |
d285f52c | 1188 | unsigned int tq_iface_penalty; |
4b426b10 | 1189 | bool ret = false; |
fc957275 ML |
1190 | |
1191 | /* find corresponding one hop neighbor */ | |
1192 | rcu_read_lock(); | |
b67bfe0d | 1193 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 1194 | &orig_neigh_node->neigh_list, list) { |
1eda58bf SE |
1195 | if (!batadv_compare_eth(tmp_neigh_node->addr, |
1196 | orig_neigh_node->orig)) | |
fc957275 ML |
1197 | continue; |
1198 | ||
1199 | if (tmp_neigh_node->if_incoming != if_incoming) | |
1200 | continue; | |
1201 | ||
77ae32e8 | 1202 | if (!kref_get_unless_zero(&tmp_neigh_node->refcount)) |
fc957275 ML |
1203 | continue; |
1204 | ||
1205 | neigh_node = tmp_neigh_node; | |
1206 | break; | |
1207 | } | |
1208 | rcu_read_unlock(); | |
1209 | ||
1210 | if (!neigh_node) | |
fe8bc396 SE |
1211 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
1212 | orig_neigh_node->orig, | |
1213 | orig_neigh_node, | |
863dd7a8 | 1214 | orig_neigh_node); |
fc957275 ML |
1215 | |
1216 | if (!neigh_node) | |
1217 | goto out; | |
1218 | ||
d7b2a97e | 1219 | /* if orig_node is direct neighbor update neigh_node last_seen */ |
fc957275 | 1220 | if (orig_node == orig_neigh_node) |
d7b2a97e | 1221 | neigh_node->last_seen = jiffies; |
fc957275 | 1222 | |
d7b2a97e | 1223 | orig_node->last_seen = jiffies; |
fc957275 ML |
1224 | |
1225 | /* find packet count of corresponding one hop neighbor */ | |
5ba7dcfe | 1226 | spin_lock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); |
bbad0a5e AQ |
1227 | if_num = if_incoming->if_num; |
1228 | orig_eq_count = orig_neigh_node->bat_iv.bcast_own_sum[if_num]; | |
89652331 SW |
1229 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
1230 | if (neigh_ifinfo) { | |
1231 | neigh_rq_count = neigh_ifinfo->bat_iv.real_packet_count; | |
044fa3ae | 1232 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 SW |
1233 | } else { |
1234 | neigh_rq_count = 0; | |
1235 | } | |
5ba7dcfe | 1236 | spin_unlock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); |
fc957275 ML |
1237 | |
1238 | /* pay attention to not get a value bigger than 100 % */ | |
c67893d1 SE |
1239 | if (orig_eq_count > neigh_rq_count) |
1240 | total_count = neigh_rq_count; | |
1241 | else | |
1242 | total_count = orig_eq_count; | |
fc957275 | 1243 | |
9cfc7bd6 SE |
1244 | /* if we have too few packets (too less data) we set tq_own to zero |
1245 | * if we receive too few packets it is not considered bidirectional | |
1246 | */ | |
42d0b044 SE |
1247 | if (total_count < BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM || |
1248 | neigh_rq_count < BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM) | |
fc957275 ML |
1249 | tq_own = 0; |
1250 | else | |
1251 | /* neigh_node->real_packet_count is never zero as we | |
1252 | * only purge old information when getting new | |
9cfc7bd6 SE |
1253 | * information |
1254 | */ | |
42d0b044 | 1255 | tq_own = (BATADV_TQ_MAX_VALUE * total_count) / neigh_rq_count; |
fc957275 | 1256 | |
21a1236b | 1257 | /* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does |
fc957275 ML |
1258 | * affect the nearly-symmetric links only a little, but |
1259 | * punishes asymmetric links more. This will give a value | |
1260 | * between 0 and TQ_MAX_VALUE | |
1261 | */ | |
42d0b044 SE |
1262 | neigh_rq_inv = BATADV_TQ_LOCAL_WINDOW_SIZE - neigh_rq_count; |
1263 | neigh_rq_inv_cube = neigh_rq_inv * neigh_rq_inv * neigh_rq_inv; | |
1264 | neigh_rq_max_cube = BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1265 | BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1266 | BATADV_TQ_LOCAL_WINDOW_SIZE; | |
1267 | inv_asym_penalty = BATADV_TQ_MAX_VALUE * neigh_rq_inv_cube; | |
1268 | inv_asym_penalty /= neigh_rq_max_cube; | |
1269 | tq_asym_penalty = BATADV_TQ_MAX_VALUE - inv_asym_penalty; | |
1270 | ||
c0398768 SW |
1271 | /* penalize if the OGM is forwarded on the same interface. WiFi |
1272 | * interfaces and other half duplex devices suffer from throughput | |
1273 | * drops as they can't send and receive at the same time. | |
1274 | */ | |
1275 | tq_iface_penalty = BATADV_TQ_MAX_VALUE; | |
825ffe1f | 1276 | if (if_outgoing && if_incoming == if_outgoing && |
10b1bbb4 | 1277 | batadv_is_wifi_hardif(if_outgoing)) |
c0398768 SW |
1278 | tq_iface_penalty = batadv_hop_penalty(BATADV_TQ_MAX_VALUE, |
1279 | bat_priv); | |
1280 | ||
1281 | combined_tq = batadv_ogm_packet->tq * | |
1282 | tq_own * | |
1283 | tq_asym_penalty * | |
1284 | tq_iface_penalty; | |
1285 | combined_tq /= BATADV_TQ_MAX_VALUE * | |
1286 | BATADV_TQ_MAX_VALUE * | |
1287 | BATADV_TQ_MAX_VALUE; | |
96412690 | 1288 | batadv_ogm_packet->tq = combined_tq; |
fc957275 | 1289 | |
39c75a51 | 1290 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
6a04be8d | 1291 | "bidirectional: orig = %pM neigh = %pM => 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 | 1292 | orig_node->orig, orig_neigh_node->orig, total_count, |
c0398768 SW |
1293 | neigh_rq_count, tq_own, tq_asym_penalty, tq_iface_penalty, |
1294 | batadv_ogm_packet->tq, if_incoming->net_dev->name, | |
1295 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT"); | |
fc957275 ML |
1296 | |
1297 | /* if link has the minimum required transmission quality | |
9cfc7bd6 SE |
1298 | * consider it bidirectional |
1299 | */ | |
96412690 | 1300 | if (batadv_ogm_packet->tq >= BATADV_TQ_TOTAL_BIDRECT_LIMIT) |
4b426b10 | 1301 | ret = true; |
fc957275 ML |
1302 | |
1303 | out: | |
1304 | if (neigh_node) | |
25bb2509 | 1305 | batadv_neigh_node_put(neigh_node); |
fc957275 ML |
1306 | return ret; |
1307 | } | |
1308 | ||
7c24bbbe | 1309 | /** |
7e9a8c2c | 1310 | * batadv_iv_ogm_update_seqnos() - process a batman packet for all interfaces, |
7c24bbbe SW |
1311 | * adjust the sequence number and find out whether it is a duplicate |
1312 | * @ethhdr: ethernet header of the packet | |
1313 | * @batadv_ogm_packet: OGM packet to be considered | |
1314 | * @if_incoming: interface on which the OGM packet was received | |
89652331 | 1315 | * @if_outgoing: interface for which the retransmission should be considered |
7c24bbbe | 1316 | * |
62fe710f | 1317 | * Return: duplicate status as enum batadv_dup_status |
fc957275 | 1318 | */ |
7c24bbbe | 1319 | static enum batadv_dup_status |
fe8bc396 | 1320 | batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, |
96412690 | 1321 | const struct batadv_ogm_packet *batadv_ogm_packet, |
89652331 SW |
1322 | const struct batadv_hard_iface *if_incoming, |
1323 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1324 | { |
56303d34 SE |
1325 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1326 | struct batadv_orig_node *orig_node; | |
7351a482 | 1327 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; |
89652331 SW |
1328 | struct batadv_neigh_node *neigh_node; |
1329 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
4b426b10 | 1330 | bool is_dup; |
6b5e971a | 1331 | s32 seq_diff; |
4b426b10 | 1332 | bool need_update = false; |
7c24bbbe SW |
1333 | int set_mark; |
1334 | enum batadv_dup_status ret = BATADV_NO_DUP; | |
6b5e971a SE |
1335 | u32 seqno = ntohl(batadv_ogm_packet->seqno); |
1336 | u8 *neigh_addr; | |
1337 | u8 packet_count; | |
0538f759 | 1338 | unsigned long *bitmap; |
fc957275 | 1339 | |
bbad0a5e | 1340 | orig_node = batadv_iv_ogm_orig_get(bat_priv, batadv_ogm_packet->orig); |
fc957275 | 1341 | if (!orig_node) |
7c24bbbe | 1342 | return BATADV_NO_DUP; |
fc957275 | 1343 | |
7351a482 SW |
1344 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1345 | if (WARN_ON(!orig_ifinfo)) { | |
5d967310 | 1346 | batadv_orig_node_put(orig_node); |
7351a482 SW |
1347 | return 0; |
1348 | } | |
1349 | ||
bbad0a5e | 1350 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
7351a482 | 1351 | seq_diff = seqno - orig_ifinfo->last_real_seqno; |
fc957275 ML |
1352 | |
1353 | /* signalize caller that the packet is to be dropped. */ | |
1e5cc266 | 1354 | if (!hlist_empty(&orig_node->neigh_list) && |
30d3c511 | 1355 | batadv_window_protected(bat_priv, seq_diff, |
81f02683 SW |
1356 | BATADV_TQ_LOCAL_WINDOW_SIZE, |
1357 | &orig_ifinfo->batman_seqno_reset, NULL)) { | |
7c24bbbe | 1358 | ret = BATADV_PROTECTED; |
fc957275 | 1359 | goto out; |
7c24bbbe | 1360 | } |
fc957275 ML |
1361 | |
1362 | rcu_read_lock(); | |
89652331 SW |
1363 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { |
1364 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, | |
1365 | if_outgoing); | |
1366 | if (!neigh_ifinfo) | |
1367 | continue; | |
1368 | ||
1369 | neigh_addr = neigh_node->addr; | |
1370 | is_dup = batadv_test_bit(neigh_ifinfo->bat_iv.real_bits, | |
7351a482 | 1371 | orig_ifinfo->last_real_seqno, |
7c24bbbe SW |
1372 | seqno); |
1373 | ||
1eda58bf | 1374 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && |
89652331 | 1375 | neigh_node->if_incoming == if_incoming) { |
fc957275 | 1376 | set_mark = 1; |
7c24bbbe SW |
1377 | if (is_dup) |
1378 | ret = BATADV_NEIGH_DUP; | |
1379 | } else { | |
fc957275 | 1380 | set_mark = 0; |
825ffe1f | 1381 | if (is_dup && ret != BATADV_NEIGH_DUP) |
7c24bbbe SW |
1382 | ret = BATADV_ORIG_DUP; |
1383 | } | |
fc957275 ML |
1384 | |
1385 | /* if the window moved, set the update flag. */ | |
89652331 | 1386 | bitmap = neigh_ifinfo->bat_iv.real_bits; |
0538f759 | 1387 | need_update |= batadv_bit_get_packet(bat_priv, bitmap, |
0f5f9322 | 1388 | seq_diff, set_mark); |
fc957275 | 1389 | |
89652331 | 1390 | packet_count = bitmap_weight(bitmap, |
bbb1f90e | 1391 | BATADV_TQ_LOCAL_WINDOW_SIZE); |
89652331 | 1392 | neigh_ifinfo->bat_iv.real_packet_count = packet_count; |
044fa3ae | 1393 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
fc957275 ML |
1394 | } |
1395 | rcu_read_unlock(); | |
1396 | ||
1397 | if (need_update) { | |
39c75a51 | 1398 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
7351a482 SW |
1399 | "%s updating last_seqno: old %u, new %u\n", |
1400 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT", | |
1401 | orig_ifinfo->last_real_seqno, seqno); | |
1402 | orig_ifinfo->last_real_seqno = seqno; | |
fc957275 ML |
1403 | } |
1404 | ||
fc957275 | 1405 | out: |
bbad0a5e | 1406 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
5d967310 | 1407 | batadv_orig_node_put(orig_node); |
35f94779 | 1408 | batadv_orig_ifinfo_put(orig_ifinfo); |
fc957275 ML |
1409 | return ret; |
1410 | } | |
1411 | ||
7351a482 | 1412 | /** |
7e9a8c2c SE |
1413 | * batadv_iv_ogm_process_per_outif() - process a batman iv OGM for an outgoing |
1414 | * interface | |
7351a482 | 1415 | * @skb: the skb containing the OGM |
95298a91 | 1416 | * @ogm_offset: offset from skb->data to start of ogm header |
7351a482 SW |
1417 | * @orig_node: the (cached) orig node for the originator of this OGM |
1418 | * @if_incoming: the interface where this packet was received | |
1419 | * @if_outgoing: the interface for which the packet should be considered | |
1420 | */ | |
1421 | static void | |
1422 | batadv_iv_ogm_process_per_outif(const struct sk_buff *skb, int ogm_offset, | |
1423 | struct batadv_orig_node *orig_node, | |
1424 | struct batadv_hard_iface *if_incoming, | |
1425 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1426 | { |
56303d34 | 1427 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
4ff1e2a7 | 1428 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
4f248cff SE |
1429 | struct batadv_neigh_node *router = NULL; |
1430 | struct batadv_neigh_node *router_router = NULL; | |
7351a482 SW |
1431 | struct batadv_orig_node *orig_neigh_node; |
1432 | struct batadv_orig_ifinfo *orig_ifinfo; | |
56303d34 | 1433 | struct batadv_neigh_node *orig_neigh_router = NULL; |
89652331 | 1434 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; |
7351a482 | 1435 | struct batadv_ogm_packet *ogm_packet; |
7c24bbbe | 1436 | enum batadv_dup_status dup_status; |
7351a482 SW |
1437 | bool is_from_best_next_hop = false; |
1438 | bool is_single_hop_neigh = false; | |
1439 | bool sameseq, similar_ttl; | |
1440 | struct sk_buff *skb_priv; | |
1441 | struct ethhdr *ethhdr; | |
6b5e971a | 1442 | u8 *prev_sender; |
4b426b10 | 1443 | bool is_bidirect; |
fc957275 | 1444 | |
7351a482 SW |
1445 | /* create a private copy of the skb, as some functions change tq value |
1446 | * and/or flags. | |
fc957275 | 1447 | */ |
7351a482 SW |
1448 | skb_priv = skb_copy(skb, GFP_ATOMIC); |
1449 | if (!skb_priv) | |
fc957275 ML |
1450 | return; |
1451 | ||
7351a482 SW |
1452 | ethhdr = eth_hdr(skb_priv); |
1453 | ogm_packet = (struct batadv_ogm_packet *)(skb_priv->data + ogm_offset); | |
fc957275 | 1454 | |
7351a482 SW |
1455 | dup_status = batadv_iv_ogm_update_seqnos(ethhdr, ogm_packet, |
1456 | if_incoming, if_outgoing); | |
1457 | if (batadv_compare_eth(ethhdr->h_source, ogm_packet->orig)) | |
75cd33f8 | 1458 | is_single_hop_neigh = true; |
fc957275 | 1459 | |
7c24bbbe | 1460 | if (dup_status == BATADV_PROTECTED) { |
39c75a51 | 1461 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1462 | "Drop packet: packet within seqno protection time (sender: %pM)\n", |
1463 | ethhdr->h_source); | |
fc957275 ML |
1464 | goto out; |
1465 | } | |
1466 | ||
7351a482 | 1467 | if (ogm_packet->tq == 0) { |
39c75a51 | 1468 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1469 | "Drop packet: originator packet with tq equal 0\n"); |
fc957275 ML |
1470 | goto out; |
1471 | } | |
1472 | ||
4ff1e2a7 ML |
1473 | if (is_single_hop_neigh) { |
1474 | hardif_neigh = batadv_hardif_neigh_get(if_incoming, | |
1475 | ethhdr->h_source); | |
1476 | if (hardif_neigh) | |
1477 | hardif_neigh->last_seen = jiffies; | |
1478 | } | |
1479 | ||
7351a482 | 1480 | router = batadv_orig_router_get(orig_node, if_outgoing); |
0538f759 | 1481 | if (router) { |
7351a482 SW |
1482 | router_router = batadv_orig_router_get(router->orig_node, |
1483 | if_outgoing); | |
1484 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
0538f759 | 1485 | } |
fc957275 | 1486 | |
7351a482 | 1487 | if ((router_ifinfo && router_ifinfo->bat_iv.tq_avg != 0) && |
1eda58bf | 1488 | (batadv_compare_eth(router->addr, ethhdr->h_source))) |
13b2541b ML |
1489 | is_from_best_next_hop = true; |
1490 | ||
7351a482 | 1491 | prev_sender = ogm_packet->prev_sender; |
fc957275 ML |
1492 | /* avoid temporary routing loops */ |
1493 | if (router && router_router && | |
1eda58bf | 1494 | (batadv_compare_eth(router->addr, prev_sender)) && |
7351a482 | 1495 | !(batadv_compare_eth(ogm_packet->orig, prev_sender)) && |
1eda58bf | 1496 | (batadv_compare_eth(router->addr, router_router->addr))) { |
39c75a51 | 1497 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1498 | "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n", |
1499 | ethhdr->h_source); | |
fc957275 ML |
1500 | goto out; |
1501 | } | |
1502 | ||
7351a482 SW |
1503 | if (if_outgoing == BATADV_IF_DEFAULT) |
1504 | batadv_tvlv_ogm_receive(bat_priv, ogm_packet, orig_node); | |
ef261577 | 1505 | |
fc957275 | 1506 | /* if sender is a direct neighbor the sender mac equals |
9cfc7bd6 SE |
1507 | * originator mac |
1508 | */ | |
c67893d1 SE |
1509 | if (is_single_hop_neigh) |
1510 | orig_neigh_node = orig_node; | |
1511 | else | |
bbad0a5e AQ |
1512 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, |
1513 | ethhdr->h_source); | |
c67893d1 | 1514 | |
fc957275 ML |
1515 | if (!orig_neigh_node) |
1516 | goto out; | |
1517 | ||
d56b1705 MH |
1518 | /* Update nc_nodes of the originator */ |
1519 | batadv_nc_update_nc_node(bat_priv, orig_node, orig_neigh_node, | |
7351a482 | 1520 | ogm_packet, is_single_hop_neigh); |
d56b1705 | 1521 | |
7351a482 SW |
1522 | orig_neigh_router = batadv_orig_router_get(orig_neigh_node, |
1523 | if_outgoing); | |
fc957275 ML |
1524 | |
1525 | /* drop packet if sender is not a direct neighbor and if we | |
9cfc7bd6 SE |
1526 | * don't route towards it |
1527 | */ | |
825ffe1f | 1528 | if (!is_single_hop_neigh && !orig_neigh_router) { |
39c75a51 | 1529 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1530 | "Drop packet: OGM via unknown neighbor!\n"); |
fc957275 ML |
1531 | goto out_neigh; |
1532 | } | |
1533 | ||
fe8bc396 | 1534 | is_bidirect = batadv_iv_ogm_calc_tq(orig_node, orig_neigh_node, |
7351a482 SW |
1535 | ogm_packet, if_incoming, |
1536 | if_outgoing); | |
fc957275 | 1537 | |
fc957275 | 1538 | /* update ranking if it is not a duplicate or has the same |
9cfc7bd6 SE |
1539 | * seqno and similar ttl as the non-duplicate |
1540 | */ | |
7351a482 SW |
1541 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1542 | if (!orig_ifinfo) | |
1543 | goto out_neigh; | |
1544 | ||
1545 | sameseq = orig_ifinfo->last_real_seqno == ntohl(ogm_packet->seqno); | |
1546 | similar_ttl = (orig_ifinfo->last_ttl - 3) <= ogm_packet->ttl; | |
1547 | ||
825ffe1f | 1548 | if (is_bidirect && (dup_status == BATADV_NO_DUP || |
7351a482 SW |
1549 | (sameseq && similar_ttl))) { |
1550 | batadv_iv_ogm_orig_update(bat_priv, orig_node, | |
1551 | orig_ifinfo, ethhdr, | |
1552 | ogm_packet, if_incoming, | |
1553 | if_outgoing, dup_status); | |
1554 | } | |
35f94779 | 1555 | batadv_orig_ifinfo_put(orig_ifinfo); |
fc957275 | 1556 | |
ef0a937f SW |
1557 | /* only forward for specific interface, not for the default one. */ |
1558 | if (if_outgoing == BATADV_IF_DEFAULT) | |
1559 | goto out_neigh; | |
1560 | ||
fc957275 ML |
1561 | /* is single hop (direct) neighbor */ |
1562 | if (is_single_hop_neigh) { | |
7351a482 SW |
1563 | /* OGMs from secondary interfaces should only scheduled once |
1564 | * per interface where it has been received, not multiple times | |
1565 | */ | |
825ffe1f SE |
1566 | if (ogm_packet->ttl <= 2 && |
1567 | if_incoming != if_outgoing) { | |
7351a482 SW |
1568 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1569 | "Drop packet: OGM from secondary interface and wrong outgoing interface\n"); | |
1570 | goto out_neigh; | |
1571 | } | |
fc957275 | 1572 | /* mark direct link on incoming interface */ |
7351a482 | 1573 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1574 | is_single_hop_neigh, |
ef0a937f SW |
1575 | is_from_best_next_hop, if_incoming, |
1576 | if_outgoing); | |
fc957275 | 1577 | |
39c75a51 | 1578 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1579 | "Forwarding packet: rebroadcast neighbor packet with direct link flag\n"); |
fc957275 ML |
1580 | goto out_neigh; |
1581 | } | |
1582 | ||
1583 | /* multihop originator */ | |
fe8bc396 | 1584 | if (!is_bidirect) { |
39c75a51 | 1585 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1586 | "Drop packet: not received via bidirectional link\n"); |
fc957275 ML |
1587 | goto out_neigh; |
1588 | } | |
1589 | ||
7c24bbbe | 1590 | if (dup_status == BATADV_NEIGH_DUP) { |
39c75a51 | 1591 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1592 | "Drop packet: duplicate packet received\n"); |
fc957275 ML |
1593 | goto out_neigh; |
1594 | } | |
1595 | ||
39c75a51 | 1596 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1597 | "Forwarding packet: rebroadcast originator packet\n"); |
7351a482 | 1598 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1599 | is_single_hop_neigh, is_from_best_next_hop, |
ef0a937f | 1600 | if_incoming, if_outgoing); |
fc957275 ML |
1601 | |
1602 | out_neigh: | |
825ffe1f | 1603 | if (orig_neigh_node && !is_single_hop_neigh) |
5d967310 | 1604 | batadv_orig_node_put(orig_neigh_node); |
fc957275 | 1605 | out: |
c1e517fb | 1606 | if (router_ifinfo) |
044fa3ae | 1607 | batadv_neigh_ifinfo_put(router_ifinfo); |
fc957275 | 1608 | if (router) |
25bb2509 | 1609 | batadv_neigh_node_put(router); |
fc957275 | 1610 | if (router_router) |
25bb2509 | 1611 | batadv_neigh_node_put(router_router); |
fc957275 | 1612 | if (orig_neigh_router) |
25bb2509 | 1613 | batadv_neigh_node_put(orig_neigh_router); |
4ff1e2a7 | 1614 | if (hardif_neigh) |
accadc35 | 1615 | batadv_hardif_neigh_put(hardif_neigh); |
fc957275 | 1616 | |
bd687fe4 | 1617 | consume_skb(skb_priv); |
7351a482 SW |
1618 | } |
1619 | ||
1620 | /** | |
7e9a8c2c | 1621 | * batadv_iv_ogm_process() - process an incoming batman iv OGM |
7351a482 SW |
1622 | * @skb: the skb containing the OGM |
1623 | * @ogm_offset: offset to the OGM which should be processed (for aggregates) | |
1624 | * @if_incoming: the interface where this packet was receved | |
1625 | */ | |
1626 | static void batadv_iv_ogm_process(const struct sk_buff *skb, int ogm_offset, | |
1627 | struct batadv_hard_iface *if_incoming) | |
1628 | { | |
1629 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); | |
1630 | struct batadv_orig_node *orig_neigh_node, *orig_node; | |
1631 | struct batadv_hard_iface *hard_iface; | |
1632 | struct batadv_ogm_packet *ogm_packet; | |
6b5e971a | 1633 | u32 if_incoming_seqno; |
7351a482 SW |
1634 | bool has_directlink_flag; |
1635 | struct ethhdr *ethhdr; | |
1636 | bool is_my_oldorig = false; | |
1637 | bool is_my_addr = false; | |
1638 | bool is_my_orig = false; | |
1639 | ||
1640 | ogm_packet = (struct batadv_ogm_packet *)(skb->data + ogm_offset); | |
1641 | ethhdr = eth_hdr(skb); | |
1642 | ||
1643 | /* Silently drop when the batman packet is actually not a | |
1644 | * correct packet. | |
1645 | * | |
1646 | * This might happen if a packet is padded (e.g. Ethernet has a | |
1647 | * minimum frame length of 64 byte) and the aggregation interprets | |
1648 | * it as an additional length. | |
1649 | * | |
1650 | * TODO: A more sane solution would be to have a bit in the | |
1651 | * batadv_ogm_packet to detect whether the packet is the last | |
1652 | * packet in an aggregation. Here we expect that the padding | |
1653 | * is always zero (or not 0x01) | |
1654 | */ | |
1655 | if (ogm_packet->packet_type != BATADV_IV_OGM) | |
1656 | return; | |
1657 | ||
1658 | /* could be changed by schedule_own_packet() */ | |
1659 | if_incoming_seqno = atomic_read(&if_incoming->bat_iv.ogm_seqno); | |
1660 | ||
1661 | if (ogm_packet->flags & BATADV_DIRECTLINK) | |
1662 | has_directlink_flag = true; | |
1663 | else | |
1664 | has_directlink_flag = false; | |
1665 | ||
1666 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1667 | "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", | |
1668 | ethhdr->h_source, if_incoming->net_dev->name, | |
1669 | if_incoming->net_dev->dev_addr, ogm_packet->orig, | |
1670 | ogm_packet->prev_sender, ntohl(ogm_packet->seqno), | |
1671 | ogm_packet->tq, ogm_packet->ttl, | |
1672 | ogm_packet->version, has_directlink_flag); | |
1673 | ||
1674 | rcu_read_lock(); | |
1675 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1676 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1677 | continue; | |
1678 | ||
1679 | if (hard_iface->soft_iface != if_incoming->soft_iface) | |
1680 | continue; | |
1681 | ||
1682 | if (batadv_compare_eth(ethhdr->h_source, | |
1683 | hard_iface->net_dev->dev_addr)) | |
1684 | is_my_addr = true; | |
1685 | ||
1686 | if (batadv_compare_eth(ogm_packet->orig, | |
1687 | hard_iface->net_dev->dev_addr)) | |
1688 | is_my_orig = true; | |
1689 | ||
1690 | if (batadv_compare_eth(ogm_packet->prev_sender, | |
1691 | hard_iface->net_dev->dev_addr)) | |
1692 | is_my_oldorig = true; | |
1693 | } | |
1694 | rcu_read_unlock(); | |
1695 | ||
1696 | if (is_my_addr) { | |
1697 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1698 | "Drop packet: received my own broadcast (sender: %pM)\n", | |
1699 | ethhdr->h_source); | |
1700 | return; | |
1701 | } | |
1702 | ||
1703 | if (is_my_orig) { | |
1704 | unsigned long *word; | |
1705 | int offset; | |
6b5e971a SE |
1706 | s32 bit_pos; |
1707 | s16 if_num; | |
1708 | u8 *weight; | |
7351a482 SW |
1709 | |
1710 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, | |
1711 | ethhdr->h_source); | |
1712 | if (!orig_neigh_node) | |
1713 | return; | |
1714 | ||
1715 | /* neighbor has to indicate direct link and it has to | |
1716 | * come via the corresponding interface | |
1717 | * save packet seqno for bidirectional check | |
1718 | */ | |
1719 | if (has_directlink_flag && | |
1720 | batadv_compare_eth(if_incoming->net_dev->dev_addr, | |
1721 | ogm_packet->orig)) { | |
1722 | if_num = if_incoming->if_num; | |
1723 | offset = if_num * BATADV_NUM_WORDS; | |
1724 | ||
1725 | spin_lock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); | |
32db6aaa | 1726 | word = &orig_neigh_node->bat_iv.bcast_own[offset]; |
7351a482 SW |
1727 | bit_pos = if_incoming_seqno - 2; |
1728 | bit_pos -= ntohl(ogm_packet->seqno); | |
1729 | batadv_set_bit(word, bit_pos); | |
1730 | weight = &orig_neigh_node->bat_iv.bcast_own_sum[if_num]; | |
1731 | *weight = bitmap_weight(word, | |
1732 | BATADV_TQ_LOCAL_WINDOW_SIZE); | |
1733 | spin_unlock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); | |
1734 | } | |
1735 | ||
1736 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1737 | "Drop packet: originator packet from myself (via neighbor)\n"); | |
5d967310 | 1738 | batadv_orig_node_put(orig_neigh_node); |
7351a482 SW |
1739 | return; |
1740 | } | |
1741 | ||
1742 | if (is_my_oldorig) { | |
1743 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1744 | "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n", | |
1745 | ethhdr->h_source); | |
1746 | return; | |
1747 | } | |
1748 | ||
1749 | if (ogm_packet->flags & BATADV_NOT_BEST_NEXT_HOP) { | |
1750 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1751 | "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n", | |
1752 | ethhdr->h_source); | |
1753 | return; | |
1754 | } | |
1755 | ||
1756 | orig_node = batadv_iv_ogm_orig_get(bat_priv, ogm_packet->orig); | |
1757 | if (!orig_node) | |
1758 | return; | |
1759 | ||
1760 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, | |
1761 | if_incoming, BATADV_IF_DEFAULT); | |
1762 | ||
1763 | rcu_read_lock(); | |
1764 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1765 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1766 | continue; | |
1767 | ||
1768 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
1769 | continue; | |
1770 | ||
27353446 SE |
1771 | if (!kref_get_unless_zero(&hard_iface->refcount)) |
1772 | continue; | |
1773 | ||
7351a482 SW |
1774 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, |
1775 | if_incoming, hard_iface); | |
27353446 SE |
1776 | |
1777 | batadv_hardif_put(hard_iface); | |
7351a482 SW |
1778 | } |
1779 | rcu_read_unlock(); | |
1780 | ||
5d967310 | 1781 | batadv_orig_node_put(orig_node); |
fc957275 ML |
1782 | } |
1783 | ||
f0d97253 AQ |
1784 | static void batadv_iv_send_outstanding_bat_ogm_packet(struct work_struct *work) |
1785 | { | |
1786 | struct delayed_work *delayed_work; | |
1787 | struct batadv_forw_packet *forw_packet; | |
1788 | struct batadv_priv *bat_priv; | |
bd687fe4 | 1789 | bool dropped = false; |
f0d97253 AQ |
1790 | |
1791 | delayed_work = to_delayed_work(work); | |
1792 | forw_packet = container_of(delayed_work, struct batadv_forw_packet, | |
1793 | delayed_work); | |
1794 | bat_priv = netdev_priv(forw_packet->if_incoming->soft_iface); | |
f0d97253 | 1795 | |
bd687fe4 SE |
1796 | if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) { |
1797 | dropped = true; | |
f0d97253 | 1798 | goto out; |
bd687fe4 | 1799 | } |
f0d97253 AQ |
1800 | |
1801 | batadv_iv_ogm_emit(forw_packet); | |
1802 | ||
1803 | /* we have to have at least one packet in the queue to determine the | |
1804 | * queues wake up time unless we are shutting down. | |
1805 | * | |
1806 | * only re-schedule if this is the "original" copy, e.g. the OGM of the | |
1807 | * primary interface should only be rescheduled once per period, but | |
1808 | * this function will be called for the forw_packet instances of the | |
1809 | * other secondary interfaces as well. | |
1810 | */ | |
1811 | if (forw_packet->own && | |
1812 | forw_packet->if_incoming == forw_packet->if_outgoing) | |
1813 | batadv_iv_ogm_schedule(forw_packet->if_incoming); | |
1814 | ||
1815 | out: | |
9b4aec64 LL |
1816 | /* do we get something for free()? */ |
1817 | if (batadv_forw_packet_steal(forw_packet, | |
1818 | &bat_priv->forw_bat_list_lock)) | |
1819 | batadv_forw_packet_free(forw_packet, dropped); | |
f0d97253 AQ |
1820 | } |
1821 | ||
fe8bc396 | 1822 | static int batadv_iv_ogm_receive(struct sk_buff *skb, |
56303d34 | 1823 | struct batadv_hard_iface *if_incoming) |
fc957275 | 1824 | { |
56303d34 | 1825 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
7351a482 | 1826 | struct batadv_ogm_packet *ogm_packet; |
6b5e971a | 1827 | u8 *packet_pos; |
7351a482 | 1828 | int ogm_offset; |
b91a2543 SE |
1829 | bool res; |
1830 | int ret = NET_RX_DROP; | |
c3e29312 | 1831 | |
b91a2543 SE |
1832 | res = batadv_check_management_packet(skb, if_incoming, BATADV_OGM_HLEN); |
1833 | if (!res) | |
1834 | goto free_skb; | |
fc957275 | 1835 | |
edbf12ba ML |
1836 | /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface |
1837 | * that does not have B.A.T.M.A.N. IV enabled ? | |
1838 | */ | |
29824a55 | 1839 | if (bat_priv->algo_ops->iface.enable != batadv_iv_ogm_iface_enable) |
b91a2543 | 1840 | goto free_skb; |
edbf12ba | 1841 | |
d69909d2 SE |
1842 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_RX); |
1843 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES, | |
f8214865 MH |
1844 | skb->len + ETH_HLEN); |
1845 | ||
7351a482 SW |
1846 | ogm_offset = 0; |
1847 | ogm_packet = (struct batadv_ogm_packet *)skb->data; | |
fc957275 ML |
1848 | |
1849 | /* unpack the aggregated packets and process them one by one */ | |
7351a482 SW |
1850 | while (batadv_iv_ogm_aggr_packet(ogm_offset, skb_headlen(skb), |
1851 | ogm_packet->tvlv_len)) { | |
1852 | batadv_iv_ogm_process(skb, ogm_offset, if_incoming); | |
fc957275 | 1853 | |
7351a482 SW |
1854 | ogm_offset += BATADV_OGM_HLEN; |
1855 | ogm_offset += ntohs(ogm_packet->tvlv_len); | |
fc957275 | 1856 | |
7351a482 SW |
1857 | packet_pos = skb->data + ogm_offset; |
1858 | ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b47506d9 | 1859 | } |
c3e29312 | 1860 | |
b91a2543 SE |
1861 | ret = NET_RX_SUCCESS; |
1862 | ||
1863 | free_skb: | |
1864 | if (ret == NET_RX_SUCCESS) | |
1865 | consume_skb(skb); | |
1866 | else | |
1867 | kfree_skb(skb); | |
1868 | ||
1869 | return ret; | |
fc957275 | 1870 | } |
1c280471 | 1871 | |
dc1cbd14 | 1872 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
1b371d13 | 1873 | /** |
7e9a8c2c | 1874 | * batadv_iv_ogm_orig_print_neigh() - print neighbors for the originator table |
89652331 SW |
1875 | * @orig_node: the orig_node for which the neighbors are printed |
1876 | * @if_outgoing: outgoing interface for these entries | |
1877 | * @seq: debugfs table seq_file struct | |
1878 | * | |
1879 | * Must be called while holding an rcu lock. | |
1880 | */ | |
1881 | static void | |
1882 | batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node *orig_node, | |
1883 | struct batadv_hard_iface *if_outgoing, | |
1884 | struct seq_file *seq) | |
1885 | { | |
1886 | struct batadv_neigh_node *neigh_node; | |
1887 | struct batadv_neigh_ifinfo *n_ifinfo; | |
1888 | ||
1889 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { | |
1890 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); | |
1891 | if (!n_ifinfo) | |
1892 | continue; | |
1893 | ||
1894 | seq_printf(seq, " %pM (%3i)", | |
1895 | neigh_node->addr, | |
1896 | n_ifinfo->bat_iv.tq_avg); | |
1897 | ||
044fa3ae | 1898 | batadv_neigh_ifinfo_put(n_ifinfo); |
89652331 SW |
1899 | } |
1900 | } | |
1901 | ||
737a2a22 | 1902 | /** |
7e9a8c2c | 1903 | * batadv_iv_ogm_orig_print() - print the originator table |
737a2a22 AQ |
1904 | * @bat_priv: the bat priv with all the soft interface information |
1905 | * @seq: debugfs table seq_file struct | |
cb1c92ec | 1906 | * @if_outgoing: the outgoing interface for which this should be printed |
737a2a22 AQ |
1907 | */ |
1908 | static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv, | |
cb1c92ec SW |
1909 | struct seq_file *seq, |
1910 | struct batadv_hard_iface *if_outgoing) | |
737a2a22 | 1911 | { |
89652331 | 1912 | struct batadv_neigh_node *neigh_node; |
737a2a22 AQ |
1913 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
1914 | int last_seen_msecs, last_seen_secs; | |
1915 | struct batadv_orig_node *orig_node; | |
89652331 | 1916 | struct batadv_neigh_ifinfo *n_ifinfo; |
737a2a22 AQ |
1917 | unsigned long last_seen_jiffies; |
1918 | struct hlist_head *head; | |
1919 | int batman_count = 0; | |
6b5e971a | 1920 | u32 i; |
737a2a22 | 1921 | |
925a6f37 AQ |
1922 | seq_puts(seq, |
1923 | " Originator last-seen (#/255) Nexthop [outgoingIF]: Potential nexthops ...\n"); | |
737a2a22 AQ |
1924 | |
1925 | for (i = 0; i < hash->size; i++) { | |
1926 | head = &hash->table[i]; | |
1927 | ||
1928 | rcu_read_lock(); | |
1929 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
7351a482 | 1930 | neigh_node = batadv_orig_router_get(orig_node, |
cb1c92ec | 1931 | if_outgoing); |
737a2a22 AQ |
1932 | if (!neigh_node) |
1933 | continue; | |
1934 | ||
89652331 | 1935 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, |
cb1c92ec | 1936 | if_outgoing); |
89652331 SW |
1937 | if (!n_ifinfo) |
1938 | goto next; | |
1939 | ||
1940 | if (n_ifinfo->bat_iv.tq_avg == 0) | |
737a2a22 AQ |
1941 | goto next; |
1942 | ||
1943 | last_seen_jiffies = jiffies - orig_node->last_seen; | |
1944 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
1945 | last_seen_secs = last_seen_msecs / 1000; | |
1946 | last_seen_msecs = last_seen_msecs % 1000; | |
1947 | ||
1948 | seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:", | |
1949 | orig_node->orig, last_seen_secs, | |
89652331 | 1950 | last_seen_msecs, n_ifinfo->bat_iv.tq_avg, |
737a2a22 AQ |
1951 | neigh_node->addr, |
1952 | neigh_node->if_incoming->net_dev->name); | |
1953 | ||
cb1c92ec SW |
1954 | batadv_iv_ogm_orig_print_neigh(orig_node, if_outgoing, |
1955 | seq); | |
626caae9 | 1956 | seq_putc(seq, '\n'); |
737a2a22 AQ |
1957 | batman_count++; |
1958 | ||
1959 | next: | |
25bb2509 | 1960 | batadv_neigh_node_put(neigh_node); |
89652331 | 1961 | if (n_ifinfo) |
044fa3ae | 1962 | batadv_neigh_ifinfo_put(n_ifinfo); |
737a2a22 AQ |
1963 | } |
1964 | rcu_read_unlock(); | |
1965 | } | |
1966 | ||
1967 | if (batman_count == 0) | |
1968 | seq_puts(seq, "No batman nodes in range ...\n"); | |
1969 | } | |
dc1cbd14 | 1970 | #endif |
737a2a22 | 1971 | |
024f99cb | 1972 | /** |
7e9a8c2c | 1973 | * batadv_iv_ogm_neigh_get_tq_avg() - Get the TQ average for a neighbour on a |
024f99cb MS |
1974 | * given outgoing interface. |
1975 | * @neigh_node: Neighbour of interest | |
1976 | * @if_outgoing: Outgoing interface of interest | |
1977 | * @tq_avg: Pointer of where to store the TQ average | |
1978 | * | |
1979 | * Return: False if no average TQ available, otherwise true. | |
1980 | */ | |
1981 | static bool | |
1982 | batadv_iv_ogm_neigh_get_tq_avg(struct batadv_neigh_node *neigh_node, | |
1983 | struct batadv_hard_iface *if_outgoing, | |
1984 | u8 *tq_avg) | |
1985 | { | |
1986 | struct batadv_neigh_ifinfo *n_ifinfo; | |
1987 | ||
1988 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); | |
1989 | if (!n_ifinfo) | |
1990 | return false; | |
1991 | ||
1992 | *tq_avg = n_ifinfo->bat_iv.tq_avg; | |
1993 | batadv_neigh_ifinfo_put(n_ifinfo); | |
1994 | ||
1995 | return true; | |
1996 | } | |
1997 | ||
1998 | /** | |
7e9a8c2c | 1999 | * batadv_iv_ogm_orig_dump_subentry() - Dump an originator subentry into a |
024f99cb MS |
2000 | * message |
2001 | * @msg: Netlink message to dump into | |
2002 | * @portid: Port making netlink request | |
2003 | * @seq: Sequence number of netlink message | |
2004 | * @bat_priv: The bat priv with all the soft interface information | |
2005 | * @if_outgoing: Limit dump to entries with this outgoing interface | |
2006 | * @orig_node: Originator to dump | |
2007 | * @neigh_node: Single hops neighbour | |
2008 | * @best: Is the best originator | |
2009 | * | |
2010 | * Return: Error code, or 0 on success | |
2011 | */ | |
2012 | static int | |
2013 | batadv_iv_ogm_orig_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq, | |
2014 | struct batadv_priv *bat_priv, | |
2015 | struct batadv_hard_iface *if_outgoing, | |
2016 | struct batadv_orig_node *orig_node, | |
2017 | struct batadv_neigh_node *neigh_node, | |
2018 | bool best) | |
2019 | { | |
2020 | void *hdr; | |
2021 | u8 tq_avg; | |
2022 | unsigned int last_seen_msecs; | |
2023 | ||
2024 | last_seen_msecs = jiffies_to_msecs(jiffies - orig_node->last_seen); | |
2025 | ||
2026 | if (!batadv_iv_ogm_neigh_get_tq_avg(neigh_node, if_outgoing, &tq_avg)) | |
2027 | return 0; | |
2028 | ||
2029 | if (if_outgoing != BATADV_IF_DEFAULT && | |
2030 | if_outgoing != neigh_node->if_incoming) | |
2031 | return 0; | |
2032 | ||
2033 | hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, | |
2034 | NLM_F_MULTI, BATADV_CMD_GET_ORIGINATORS); | |
2035 | if (!hdr) | |
2036 | return -ENOBUFS; | |
2037 | ||
2038 | if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, | |
2039 | orig_node->orig) || | |
2040 | nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN, | |
2041 | neigh_node->addr) || | |
2042 | nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, | |
2043 | neigh_node->if_incoming->net_dev->ifindex) || | |
2044 | nla_put_u8(msg, BATADV_ATTR_TQ, tq_avg) || | |
2045 | nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, | |
2046 | last_seen_msecs)) | |
2047 | goto nla_put_failure; | |
2048 | ||
2049 | if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) | |
2050 | goto nla_put_failure; | |
2051 | ||
2052 | genlmsg_end(msg, hdr); | |
2053 | return 0; | |
2054 | ||
2055 | nla_put_failure: | |
2056 | genlmsg_cancel(msg, hdr); | |
2057 | return -EMSGSIZE; | |
2058 | } | |
2059 | ||
2060 | /** | |
7e9a8c2c | 2061 | * batadv_iv_ogm_orig_dump_entry() - Dump an originator entry into a message |
024f99cb MS |
2062 | * @msg: Netlink message to dump into |
2063 | * @portid: Port making netlink request | |
2064 | * @seq: Sequence number of netlink message | |
2065 | * @bat_priv: The bat priv with all the soft interface information | |
2066 | * @if_outgoing: Limit dump to entries with this outgoing interface | |
2067 | * @orig_node: Originator to dump | |
2068 | * @sub_s: Number of sub entries to skip | |
2069 | * | |
2070 | * This function assumes the caller holds rcu_read_lock(). | |
2071 | * | |
2072 | * Return: Error code, or 0 on success | |
2073 | */ | |
2074 | static int | |
2075 | batadv_iv_ogm_orig_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, | |
2076 | struct batadv_priv *bat_priv, | |
2077 | struct batadv_hard_iface *if_outgoing, | |
2078 | struct batadv_orig_node *orig_node, int *sub_s) | |
2079 | { | |
2080 | struct batadv_neigh_node *neigh_node_best; | |
2081 | struct batadv_neigh_node *neigh_node; | |
2082 | int sub = 0; | |
2083 | bool best; | |
2084 | u8 tq_avg_best; | |
2085 | ||
2086 | neigh_node_best = batadv_orig_router_get(orig_node, if_outgoing); | |
2087 | if (!neigh_node_best) | |
2088 | goto out; | |
2089 | ||
2090 | if (!batadv_iv_ogm_neigh_get_tq_avg(neigh_node_best, if_outgoing, | |
2091 | &tq_avg_best)) | |
2092 | goto out; | |
2093 | ||
2094 | if (tq_avg_best == 0) | |
2095 | goto out; | |
2096 | ||
2097 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { | |
2098 | if (sub++ < *sub_s) | |
2099 | continue; | |
2100 | ||
2101 | best = (neigh_node == neigh_node_best); | |
2102 | ||
2103 | if (batadv_iv_ogm_orig_dump_subentry(msg, portid, seq, | |
2104 | bat_priv, if_outgoing, | |
2105 | orig_node, neigh_node, | |
2106 | best)) { | |
2107 | batadv_neigh_node_put(neigh_node_best); | |
2108 | ||
2109 | *sub_s = sub - 1; | |
2110 | return -EMSGSIZE; | |
2111 | } | |
2112 | } | |
2113 | ||
2114 | out: | |
2115 | if (neigh_node_best) | |
2116 | batadv_neigh_node_put(neigh_node_best); | |
2117 | ||
2118 | *sub_s = 0; | |
2119 | return 0; | |
2120 | } | |
2121 | ||
2122 | /** | |
7e9a8c2c | 2123 | * batadv_iv_ogm_orig_dump_bucket() - Dump an originator bucket into a |
024f99cb MS |
2124 | * message |
2125 | * @msg: Netlink message to dump into | |
2126 | * @portid: Port making netlink request | |
2127 | * @seq: Sequence number of netlink message | |
2128 | * @bat_priv: The bat priv with all the soft interface information | |
2129 | * @if_outgoing: Limit dump to entries with this outgoing interface | |
2130 | * @head: Bucket to be dumped | |
2131 | * @idx_s: Number of entries to be skipped | |
2132 | * @sub: Number of sub entries to be skipped | |
2133 | * | |
2134 | * Return: Error code, or 0 on success | |
2135 | */ | |
2136 | static int | |
2137 | batadv_iv_ogm_orig_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, | |
2138 | struct batadv_priv *bat_priv, | |
2139 | struct batadv_hard_iface *if_outgoing, | |
2140 | struct hlist_head *head, int *idx_s, int *sub) | |
2141 | { | |
2142 | struct batadv_orig_node *orig_node; | |
2143 | int idx = 0; | |
2144 | ||
2145 | rcu_read_lock(); | |
2146 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
2147 | if (idx++ < *idx_s) | |
2148 | continue; | |
2149 | ||
2150 | if (batadv_iv_ogm_orig_dump_entry(msg, portid, seq, bat_priv, | |
2151 | if_outgoing, orig_node, | |
2152 | sub)) { | |
2153 | rcu_read_unlock(); | |
2154 | *idx_s = idx - 1; | |
2155 | return -EMSGSIZE; | |
2156 | } | |
2157 | } | |
2158 | rcu_read_unlock(); | |
2159 | ||
2160 | *idx_s = 0; | |
2161 | *sub = 0; | |
2162 | return 0; | |
2163 | } | |
2164 | ||
2165 | /** | |
7e9a8c2c | 2166 | * batadv_iv_ogm_orig_dump() - Dump the originators into a message |
024f99cb MS |
2167 | * @msg: Netlink message to dump into |
2168 | * @cb: Control block containing additional options | |
2169 | * @bat_priv: The bat priv with all the soft interface information | |
2170 | * @if_outgoing: Limit dump to entries with this outgoing interface | |
2171 | */ | |
2172 | static void | |
2173 | batadv_iv_ogm_orig_dump(struct sk_buff *msg, struct netlink_callback *cb, | |
2174 | struct batadv_priv *bat_priv, | |
2175 | struct batadv_hard_iface *if_outgoing) | |
2176 | { | |
2177 | struct batadv_hashtable *hash = bat_priv->orig_hash; | |
2178 | struct hlist_head *head; | |
2179 | int bucket = cb->args[0]; | |
2180 | int idx = cb->args[1]; | |
2181 | int sub = cb->args[2]; | |
2182 | int portid = NETLINK_CB(cb->skb).portid; | |
2183 | ||
2184 | while (bucket < hash->size) { | |
2185 | head = &hash->table[bucket]; | |
2186 | ||
2187 | if (batadv_iv_ogm_orig_dump_bucket(msg, portid, | |
2188 | cb->nlh->nlmsg_seq, | |
2189 | bat_priv, if_outgoing, head, | |
2190 | &idx, &sub)) | |
2191 | break; | |
2192 | ||
2193 | bucket++; | |
2194 | } | |
2195 | ||
2196 | cb->args[0] = bucket; | |
2197 | cb->args[1] = idx; | |
2198 | cb->args[2] = sub; | |
2199 | } | |
2200 | ||
dc1cbd14 | 2201 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
7587405a | 2202 | /** |
7e9a8c2c | 2203 | * batadv_iv_hardif_neigh_print() - print a single hop neighbour node |
7587405a ML |
2204 | * @seq: neighbour table seq_file struct |
2205 | * @hardif_neigh: hardif neighbour information | |
2206 | */ | |
2207 | static void | |
2208 | batadv_iv_hardif_neigh_print(struct seq_file *seq, | |
2209 | struct batadv_hardif_neigh_node *hardif_neigh) | |
2210 | { | |
2211 | int last_secs, last_msecs; | |
2212 | ||
2213 | last_secs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) / 1000; | |
2214 | last_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) % 1000; | |
2215 | ||
2216 | seq_printf(seq, " %10s %pM %4i.%03is\n", | |
2217 | hardif_neigh->if_incoming->net_dev->name, | |
2218 | hardif_neigh->addr, last_secs, last_msecs); | |
2219 | } | |
2220 | ||
2221 | /** | |
7e9a8c2c | 2222 | * batadv_iv_ogm_neigh_print() - print the single hop neighbour list |
7587405a ML |
2223 | * @bat_priv: the bat priv with all the soft interface information |
2224 | * @seq: neighbour table seq_file struct | |
2225 | */ | |
2226 | static void batadv_iv_neigh_print(struct batadv_priv *bat_priv, | |
2227 | struct seq_file *seq) | |
2228 | { | |
2229 | struct net_device *net_dev = (struct net_device *)seq->private; | |
2230 | struct batadv_hardif_neigh_node *hardif_neigh; | |
2231 | struct batadv_hard_iface *hard_iface; | |
2232 | int batman_count = 0; | |
2233 | ||
925a6f37 | 2234 | seq_puts(seq, " IF Neighbor last-seen\n"); |
7587405a ML |
2235 | |
2236 | rcu_read_lock(); | |
2237 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
2238 | if (hard_iface->soft_iface != net_dev) | |
2239 | continue; | |
2240 | ||
2241 | hlist_for_each_entry_rcu(hardif_neigh, | |
2242 | &hard_iface->neigh_list, list) { | |
2243 | batadv_iv_hardif_neigh_print(seq, hardif_neigh); | |
2244 | batman_count++; | |
2245 | } | |
2246 | } | |
2247 | rcu_read_unlock(); | |
2248 | ||
2249 | if (batman_count == 0) | |
2250 | seq_puts(seq, "No batman nodes in range ...\n"); | |
2251 | } | |
dc1cbd14 | 2252 | #endif |
7587405a | 2253 | |
a3285a8f | 2254 | /** |
7e9a8c2c | 2255 | * batadv_iv_ogm_neigh_diff() - calculate tq difference of two neighbors |
a3285a8f | 2256 | * @neigh1: the first neighbor object of the comparison |
89652331 | 2257 | * @if_outgoing1: outgoing interface for the first neighbor |
a3285a8f | 2258 | * @neigh2: the second neighbor object of the comparison |
89652331 | 2259 | * @if_outgoing2: outgoing interface for the second neighbor |
57b12502 | 2260 | * @diff: pointer to integer receiving the calculated difference |
a3285a8f | 2261 | * |
57b12502 MP |
2262 | * The content of *@diff is only valid when this function returns true. |
2263 | * It is less, equal to or greater than 0 if the metric via neigh1 is lower, | |
2264 | * the same as or higher than the metric via neigh2 | |
2265 | * | |
2266 | * Return: true when the difference could be calculated, false otherwise | |
a3285a8f | 2267 | */ |
57b12502 MP |
2268 | static bool batadv_iv_ogm_neigh_diff(struct batadv_neigh_node *neigh1, |
2269 | struct batadv_hard_iface *if_outgoing1, | |
2270 | struct batadv_neigh_node *neigh2, | |
2271 | struct batadv_hard_iface *if_outgoing2, | |
2272 | int *diff) | |
a3285a8f | 2273 | { |
89652331 | 2274 | struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; |
6b5e971a | 2275 | u8 tq1, tq2; |
57b12502 | 2276 | bool ret = true; |
89652331 SW |
2277 | |
2278 | neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); | |
2279 | neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
a3285a8f | 2280 | |
89652331 | 2281 | if (!neigh1_ifinfo || !neigh2_ifinfo) { |
57b12502 | 2282 | ret = false; |
89652331 SW |
2283 | goto out; |
2284 | } | |
a3285a8f | 2285 | |
89652331 SW |
2286 | tq1 = neigh1_ifinfo->bat_iv.tq_avg; |
2287 | tq2 = neigh2_ifinfo->bat_iv.tq_avg; | |
57b12502 | 2288 | *diff = (int)tq1 - (int)tq2; |
89652331 SW |
2289 | |
2290 | out: | |
2291 | if (neigh1_ifinfo) | |
044fa3ae | 2292 | batadv_neigh_ifinfo_put(neigh1_ifinfo); |
89652331 | 2293 | if (neigh2_ifinfo) |
044fa3ae | 2294 | batadv_neigh_ifinfo_put(neigh2_ifinfo); |
89652331 | 2295 | |
57b12502 MP |
2296 | return ret; |
2297 | } | |
2298 | ||
024f99cb | 2299 | /** |
7e9a8c2c | 2300 | * batadv_iv_ogm_neigh_dump_neigh() - Dump a neighbour into a netlink message |
024f99cb MS |
2301 | * @msg: Netlink message to dump into |
2302 | * @portid: Port making netlink request | |
2303 | * @seq: Sequence number of netlink message | |
2304 | * @hardif_neigh: Neighbour to be dumped | |
2305 | * | |
2306 | * Return: Error code, or 0 on success | |
2307 | */ | |
2308 | static int | |
2309 | batadv_iv_ogm_neigh_dump_neigh(struct sk_buff *msg, u32 portid, u32 seq, | |
2310 | struct batadv_hardif_neigh_node *hardif_neigh) | |
2311 | { | |
2312 | void *hdr; | |
2313 | unsigned int last_seen_msecs; | |
2314 | ||
2315 | last_seen_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen); | |
2316 | ||
2317 | hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, | |
2318 | NLM_F_MULTI, BATADV_CMD_GET_NEIGHBORS); | |
2319 | if (!hdr) | |
2320 | return -ENOBUFS; | |
2321 | ||
2322 | if (nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN, | |
2323 | hardif_neigh->addr) || | |
2324 | nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, | |
2325 | hardif_neigh->if_incoming->net_dev->ifindex) || | |
2326 | nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, | |
2327 | last_seen_msecs)) | |
2328 | goto nla_put_failure; | |
2329 | ||
2330 | genlmsg_end(msg, hdr); | |
2331 | return 0; | |
2332 | ||
2333 | nla_put_failure: | |
2334 | genlmsg_cancel(msg, hdr); | |
2335 | return -EMSGSIZE; | |
2336 | } | |
2337 | ||
2338 | /** | |
7e9a8c2c | 2339 | * batadv_iv_ogm_neigh_dump_hardif() - Dump the neighbours of a hard interface |
024f99cb MS |
2340 | * into a message |
2341 | * @msg: Netlink message to dump into | |
2342 | * @portid: Port making netlink request | |
2343 | * @seq: Sequence number of netlink message | |
2344 | * @bat_priv: The bat priv with all the soft interface information | |
2345 | * @hard_iface: Hard interface to dump the neighbours for | |
2346 | * @idx_s: Number of entries to skip | |
2347 | * | |
2348 | * This function assumes the caller holds rcu_read_lock(). | |
2349 | * | |
2350 | * Return: Error code, or 0 on success | |
2351 | */ | |
2352 | static int | |
2353 | batadv_iv_ogm_neigh_dump_hardif(struct sk_buff *msg, u32 portid, u32 seq, | |
2354 | struct batadv_priv *bat_priv, | |
2355 | struct batadv_hard_iface *hard_iface, | |
2356 | int *idx_s) | |
2357 | { | |
2358 | struct batadv_hardif_neigh_node *hardif_neigh; | |
2359 | int idx = 0; | |
2360 | ||
2361 | hlist_for_each_entry_rcu(hardif_neigh, | |
2362 | &hard_iface->neigh_list, list) { | |
2363 | if (idx++ < *idx_s) | |
2364 | continue; | |
2365 | ||
2366 | if (batadv_iv_ogm_neigh_dump_neigh(msg, portid, seq, | |
2367 | hardif_neigh)) { | |
2368 | *idx_s = idx - 1; | |
2369 | return -EMSGSIZE; | |
2370 | } | |
2371 | } | |
2372 | ||
2373 | *idx_s = 0; | |
2374 | return 0; | |
2375 | } | |
2376 | ||
2377 | /** | |
7e9a8c2c | 2378 | * batadv_iv_ogm_neigh_dump() - Dump the neighbours into a message |
024f99cb MS |
2379 | * @msg: Netlink message to dump into |
2380 | * @cb: Control block containing additional options | |
2381 | * @bat_priv: The bat priv with all the soft interface information | |
2382 | * @single_hardif: Limit dump to this hard interfaace | |
2383 | */ | |
2384 | static void | |
2385 | batadv_iv_ogm_neigh_dump(struct sk_buff *msg, struct netlink_callback *cb, | |
2386 | struct batadv_priv *bat_priv, | |
2387 | struct batadv_hard_iface *single_hardif) | |
2388 | { | |
2389 | struct batadv_hard_iface *hard_iface; | |
2390 | int i_hardif = 0; | |
2391 | int i_hardif_s = cb->args[0]; | |
2392 | int idx = cb->args[1]; | |
2393 | int portid = NETLINK_CB(cb->skb).portid; | |
2394 | ||
2395 | rcu_read_lock(); | |
2396 | if (single_hardif) { | |
2397 | if (i_hardif_s == 0) { | |
2398 | if (batadv_iv_ogm_neigh_dump_hardif(msg, portid, | |
2399 | cb->nlh->nlmsg_seq, | |
2400 | bat_priv, | |
2401 | single_hardif, | |
2402 | &idx) == 0) | |
2403 | i_hardif++; | |
2404 | } | |
2405 | } else { | |
2406 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, | |
2407 | list) { | |
2408 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
2409 | continue; | |
2410 | ||
2411 | if (i_hardif++ < i_hardif_s) | |
2412 | continue; | |
2413 | ||
2414 | if (batadv_iv_ogm_neigh_dump_hardif(msg, portid, | |
2415 | cb->nlh->nlmsg_seq, | |
2416 | bat_priv, | |
2417 | hard_iface, &idx)) { | |
2418 | i_hardif--; | |
2419 | break; | |
2420 | } | |
2421 | } | |
2422 | } | |
2423 | rcu_read_unlock(); | |
2424 | ||
2425 | cb->args[0] = i_hardif; | |
2426 | cb->args[1] = idx; | |
2427 | } | |
2428 | ||
57b12502 | 2429 | /** |
7e9a8c2c | 2430 | * batadv_iv_ogm_neigh_cmp() - compare the metrics of two neighbors |
57b12502 MP |
2431 | * @neigh1: the first neighbor object of the comparison |
2432 | * @if_outgoing1: outgoing interface for the first neighbor | |
2433 | * @neigh2: the second neighbor object of the comparison | |
2434 | * @if_outgoing2: outgoing interface for the second neighbor | |
2435 | * | |
2436 | * Return: a value less, equal to or greater than 0 if the metric via neigh1 is | |
2437 | * lower, the same as or higher than the metric via neigh2 | |
2438 | */ | |
2439 | static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node *neigh1, | |
2440 | struct batadv_hard_iface *if_outgoing1, | |
2441 | struct batadv_neigh_node *neigh2, | |
2442 | struct batadv_hard_iface *if_outgoing2) | |
2443 | { | |
2444 | bool ret; | |
2445 | int diff; | |
2446 | ||
2447 | ret = batadv_iv_ogm_neigh_diff(neigh1, if_outgoing1, neigh2, | |
2448 | if_outgoing2, &diff); | |
2449 | if (!ret) | |
2450 | return 0; | |
2451 | ||
89652331 | 2452 | return diff; |
a3285a8f AQ |
2453 | } |
2454 | ||
c43c981e | 2455 | /** |
7e9a8c2c | 2456 | * batadv_iv_ogm_neigh_is_sob() - check if neigh1 is similarly good or better |
18165f6f | 2457 | * than neigh2 from the metric prospective |
c43c981e | 2458 | * @neigh1: the first neighbor object of the comparison |
95298a91 | 2459 | * @if_outgoing1: outgoing interface for the first neighbor |
c43c981e | 2460 | * @neigh2: the second neighbor object of the comparison |
89652331 | 2461 | * @if_outgoing2: outgoing interface for the second neighbor |
95298a91 | 2462 | * |
62fe710f | 2463 | * Return: true if the metric via neigh1 is equally good or better than |
89652331 | 2464 | * the metric via neigh2, false otherwise. |
c43c981e | 2465 | */ |
89652331 | 2466 | static bool |
18165f6f | 2467 | batadv_iv_ogm_neigh_is_sob(struct batadv_neigh_node *neigh1, |
89652331 SW |
2468 | struct batadv_hard_iface *if_outgoing1, |
2469 | struct batadv_neigh_node *neigh2, | |
2470 | struct batadv_hard_iface *if_outgoing2) | |
c43c981e | 2471 | { |
89652331 | 2472 | bool ret; |
57b12502 | 2473 | int diff; |
c43c981e | 2474 | |
57b12502 MP |
2475 | ret = batadv_iv_ogm_neigh_diff(neigh1, if_outgoing1, neigh2, |
2476 | if_outgoing2, &diff); | |
2477 | if (!ret) | |
2478 | return false; | |
89652331 | 2479 | |
57b12502 | 2480 | ret = diff > -BATADV_TQ_SIMILARITY_THRESHOLD; |
89652331 | 2481 | return ret; |
c43c981e AQ |
2482 | } |
2483 | ||
f0d97253 AQ |
2484 | static void batadv_iv_iface_activate(struct batadv_hard_iface *hard_iface) |
2485 | { | |
2486 | /* begin scheduling originator messages on that interface */ | |
2487 | batadv_iv_ogm_schedule(hard_iface); | |
2488 | } | |
2489 | ||
1a9070ec | 2490 | /** |
7e9a8c2c | 2491 | * batadv_iv_init_sel_class() - initialize GW selection class |
1a9070ec SE |
2492 | * @bat_priv: the bat priv with all the soft interface information |
2493 | */ | |
2494 | static void batadv_iv_init_sel_class(struct batadv_priv *bat_priv) | |
2495 | { | |
2496 | /* set default TQ difference threshold to 20 */ | |
2497 | atomic_set(&bat_priv->gw.sel_class, 20); | |
2498 | } | |
2499 | ||
34d99cfe AQ |
2500 | static struct batadv_gw_node * |
2501 | batadv_iv_gw_get_best_gw_node(struct batadv_priv *bat_priv) | |
2502 | { | |
2503 | struct batadv_neigh_node *router; | |
2504 | struct batadv_neigh_ifinfo *router_ifinfo; | |
2505 | struct batadv_gw_node *gw_node, *curr_gw = NULL; | |
2506 | u64 max_gw_factor = 0; | |
2507 | u64 tmp_gw_factor = 0; | |
2508 | u8 max_tq = 0; | |
2509 | u8 tq_avg; | |
2510 | struct batadv_orig_node *orig_node; | |
2511 | ||
2512 | rcu_read_lock(); | |
70ea5cee | 2513 | hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.gateway_list, list) { |
34d99cfe AQ |
2514 | orig_node = gw_node->orig_node; |
2515 | router = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT); | |
2516 | if (!router) | |
2517 | continue; | |
2518 | ||
2519 | router_ifinfo = batadv_neigh_ifinfo_get(router, | |
2520 | BATADV_IF_DEFAULT); | |
2521 | if (!router_ifinfo) | |
2522 | goto next; | |
2523 | ||
2524 | if (!kref_get_unless_zero(&gw_node->refcount)) | |
2525 | goto next; | |
2526 | ||
2527 | tq_avg = router_ifinfo->bat_iv.tq_avg; | |
2528 | ||
2529 | switch (atomic_read(&bat_priv->gw.sel_class)) { | |
2530 | case 1: /* fast connection */ | |
2531 | tmp_gw_factor = tq_avg * tq_avg; | |
2532 | tmp_gw_factor *= gw_node->bandwidth_down; | |
2533 | tmp_gw_factor *= 100 * 100; | |
2534 | tmp_gw_factor >>= 18; | |
2535 | ||
825ffe1f SE |
2536 | if (tmp_gw_factor > max_gw_factor || |
2537 | (tmp_gw_factor == max_gw_factor && | |
2538 | tq_avg > max_tq)) { | |
34d99cfe AQ |
2539 | if (curr_gw) |
2540 | batadv_gw_node_put(curr_gw); | |
2541 | curr_gw = gw_node; | |
2542 | kref_get(&curr_gw->refcount); | |
2543 | } | |
2544 | break; | |
2545 | ||
2546 | default: /* 2: stable connection (use best statistic) | |
2547 | * 3: fast-switch (use best statistic but change as | |
2548 | * soon as a better gateway appears) | |
2549 | * XX: late-switch (use best statistic but change as | |
2550 | * soon as a better gateway appears which has | |
2551 | * $routing_class more tq points) | |
2552 | */ | |
2553 | if (tq_avg > max_tq) { | |
2554 | if (curr_gw) | |
2555 | batadv_gw_node_put(curr_gw); | |
2556 | curr_gw = gw_node; | |
2557 | kref_get(&curr_gw->refcount); | |
2558 | } | |
2559 | break; | |
2560 | } | |
2561 | ||
2562 | if (tq_avg > max_tq) | |
2563 | max_tq = tq_avg; | |
2564 | ||
2565 | if (tmp_gw_factor > max_gw_factor) | |
2566 | max_gw_factor = tmp_gw_factor; | |
2567 | ||
2568 | batadv_gw_node_put(gw_node); | |
2569 | ||
2570 | next: | |
2571 | batadv_neigh_node_put(router); | |
2572 | if (router_ifinfo) | |
2573 | batadv_neigh_ifinfo_put(router_ifinfo); | |
2574 | } | |
2575 | rcu_read_unlock(); | |
2576 | ||
2577 | return curr_gw; | |
2578 | } | |
2579 | ||
2580 | static bool batadv_iv_gw_is_eligible(struct batadv_priv *bat_priv, | |
2581 | struct batadv_orig_node *curr_gw_orig, | |
2582 | struct batadv_orig_node *orig_node) | |
2583 | { | |
2584 | struct batadv_neigh_ifinfo *router_orig_ifinfo = NULL; | |
2585 | struct batadv_neigh_ifinfo *router_gw_ifinfo = NULL; | |
2586 | struct batadv_neigh_node *router_gw = NULL; | |
2587 | struct batadv_neigh_node *router_orig = NULL; | |
2588 | u8 gw_tq_avg, orig_tq_avg; | |
2589 | bool ret = false; | |
2590 | ||
2591 | /* dynamic re-election is performed only on fast or late switch */ | |
2592 | if (atomic_read(&bat_priv->gw.sel_class) <= 2) | |
2593 | return false; | |
2594 | ||
2595 | router_gw = batadv_orig_router_get(curr_gw_orig, BATADV_IF_DEFAULT); | |
2596 | if (!router_gw) { | |
2597 | ret = true; | |
2598 | goto out; | |
2599 | } | |
2600 | ||
2601 | router_gw_ifinfo = batadv_neigh_ifinfo_get(router_gw, | |
2602 | BATADV_IF_DEFAULT); | |
2603 | if (!router_gw_ifinfo) { | |
2604 | ret = true; | |
2605 | goto out; | |
2606 | } | |
2607 | ||
2608 | router_orig = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT); | |
2609 | if (!router_orig) | |
2610 | goto out; | |
2611 | ||
2612 | router_orig_ifinfo = batadv_neigh_ifinfo_get(router_orig, | |
2613 | BATADV_IF_DEFAULT); | |
2614 | if (!router_orig_ifinfo) | |
2615 | goto out; | |
2616 | ||
2617 | gw_tq_avg = router_gw_ifinfo->bat_iv.tq_avg; | |
2618 | orig_tq_avg = router_orig_ifinfo->bat_iv.tq_avg; | |
2619 | ||
2620 | /* the TQ value has to be better */ | |
2621 | if (orig_tq_avg < gw_tq_avg) | |
2622 | goto out; | |
2623 | ||
2624 | /* if the routing class is greater than 3 the value tells us how much | |
2625 | * greater the TQ value of the new gateway must be | |
2626 | */ | |
2627 | if ((atomic_read(&bat_priv->gw.sel_class) > 3) && | |
2628 | (orig_tq_avg - gw_tq_avg < atomic_read(&bat_priv->gw.sel_class))) | |
2629 | goto out; | |
2630 | ||
2631 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
2632 | "Restarting gateway selection: better gateway found (tq curr: %i, tq new: %i)\n", | |
2633 | gw_tq_avg, orig_tq_avg); | |
2634 | ||
2635 | ret = true; | |
2636 | out: | |
2637 | if (router_gw_ifinfo) | |
2638 | batadv_neigh_ifinfo_put(router_gw_ifinfo); | |
2639 | if (router_orig_ifinfo) | |
2640 | batadv_neigh_ifinfo_put(router_orig_ifinfo); | |
2641 | if (router_gw) | |
2642 | batadv_neigh_node_put(router_gw); | |
2643 | if (router_orig) | |
2644 | batadv_neigh_node_put(router_orig); | |
2645 | ||
2646 | return ret; | |
2647 | } | |
2648 | ||
dc1cbd14 | 2649 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
34d99cfe AQ |
2650 | /* fails if orig_node has no router */ |
2651 | static int batadv_iv_gw_write_buffer_text(struct batadv_priv *bat_priv, | |
2652 | struct seq_file *seq, | |
2653 | const struct batadv_gw_node *gw_node) | |
2654 | { | |
2655 | struct batadv_gw_node *curr_gw; | |
2656 | struct batadv_neigh_node *router; | |
2657 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; | |
2658 | int ret = -1; | |
2659 | ||
2660 | router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT); | |
2661 | if (!router) | |
2662 | goto out; | |
2663 | ||
2664 | router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT); | |
2665 | if (!router_ifinfo) | |
2666 | goto out; | |
2667 | ||
2668 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); | |
2669 | ||
2670 | seq_printf(seq, "%s %pM (%3i) %pM [%10s]: %u.%u/%u.%u MBit\n", | |
2671 | (curr_gw == gw_node ? "=>" : " "), | |
2672 | gw_node->orig_node->orig, | |
2673 | router_ifinfo->bat_iv.tq_avg, router->addr, | |
2674 | router->if_incoming->net_dev->name, | |
2675 | gw_node->bandwidth_down / 10, | |
2676 | gw_node->bandwidth_down % 10, | |
2677 | gw_node->bandwidth_up / 10, | |
2678 | gw_node->bandwidth_up % 10); | |
2679 | ret = seq_has_overflowed(seq) ? -1 : 0; | |
2680 | ||
2681 | if (curr_gw) | |
2682 | batadv_gw_node_put(curr_gw); | |
2683 | out: | |
2684 | if (router_ifinfo) | |
2685 | batadv_neigh_ifinfo_put(router_ifinfo); | |
2686 | if (router) | |
2687 | batadv_neigh_node_put(router); | |
2688 | return ret; | |
2689 | } | |
2690 | ||
2691 | static void batadv_iv_gw_print(struct batadv_priv *bat_priv, | |
2692 | struct seq_file *seq) | |
2693 | { | |
2694 | struct batadv_gw_node *gw_node; | |
2695 | int gw_count = 0; | |
2696 | ||
2697 | seq_puts(seq, | |
2698 | " Gateway (#/255) Nexthop [outgoingIF]: advertised uplink bandwidth\n"); | |
2699 | ||
2700 | rcu_read_lock(); | |
70ea5cee | 2701 | hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.gateway_list, list) { |
34d99cfe AQ |
2702 | /* fails if orig_node has no router */ |
2703 | if (batadv_iv_gw_write_buffer_text(bat_priv, seq, gw_node) < 0) | |
2704 | continue; | |
2705 | ||
2706 | gw_count++; | |
2707 | } | |
2708 | rcu_read_unlock(); | |
2709 | ||
2710 | if (gw_count == 0) | |
2711 | seq_puts(seq, "No gateways in range ...\n"); | |
2712 | } | |
dc1cbd14 | 2713 | #endif |
34d99cfe | 2714 | |
efb766af | 2715 | /** |
7e9a8c2c | 2716 | * batadv_iv_gw_dump_entry() - Dump a gateway into a message |
efb766af AL |
2717 | * @msg: Netlink message to dump into |
2718 | * @portid: Port making netlink request | |
2719 | * @seq: Sequence number of netlink message | |
2720 | * @bat_priv: The bat priv with all the soft interface information | |
2721 | * @gw_node: Gateway to be dumped | |
2722 | * | |
2723 | * Return: Error code, or 0 on success | |
2724 | */ | |
2725 | static int batadv_iv_gw_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, | |
2726 | struct batadv_priv *bat_priv, | |
2727 | struct batadv_gw_node *gw_node) | |
2728 | { | |
2729 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; | |
2730 | struct batadv_neigh_node *router; | |
2731 | struct batadv_gw_node *curr_gw; | |
2732 | int ret = -EINVAL; | |
2733 | void *hdr; | |
2734 | ||
2735 | router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT); | |
2736 | if (!router) | |
2737 | goto out; | |
2738 | ||
2739 | router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT); | |
2740 | if (!router_ifinfo) | |
2741 | goto out; | |
2742 | ||
2743 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); | |
2744 | ||
2745 | hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, | |
2746 | NLM_F_MULTI, BATADV_CMD_GET_GATEWAYS); | |
2747 | if (!hdr) { | |
2748 | ret = -ENOBUFS; | |
2749 | goto out; | |
2750 | } | |
2751 | ||
2752 | ret = -EMSGSIZE; | |
2753 | ||
2754 | if (curr_gw == gw_node) | |
2755 | if (nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) { | |
2756 | genlmsg_cancel(msg, hdr); | |
2757 | goto out; | |
2758 | } | |
2759 | ||
2760 | if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, | |
2761 | gw_node->orig_node->orig) || | |
2762 | nla_put_u8(msg, BATADV_ATTR_TQ, router_ifinfo->bat_iv.tq_avg) || | |
2763 | nla_put(msg, BATADV_ATTR_ROUTER, ETH_ALEN, | |
2764 | router->addr) || | |
2765 | nla_put_string(msg, BATADV_ATTR_HARD_IFNAME, | |
2766 | router->if_incoming->net_dev->name) || | |
2767 | nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_DOWN, | |
2768 | gw_node->bandwidth_down) || | |
2769 | nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_UP, | |
2770 | gw_node->bandwidth_up)) { | |
2771 | genlmsg_cancel(msg, hdr); | |
2772 | goto out; | |
2773 | } | |
2774 | ||
2775 | genlmsg_end(msg, hdr); | |
2776 | ret = 0; | |
2777 | ||
2778 | out: | |
2779 | if (router_ifinfo) | |
2780 | batadv_neigh_ifinfo_put(router_ifinfo); | |
2781 | if (router) | |
2782 | batadv_neigh_node_put(router); | |
2783 | return ret; | |
2784 | } | |
2785 | ||
2786 | /** | |
7e9a8c2c | 2787 | * batadv_iv_gw_dump() - Dump gateways into a message |
efb766af AL |
2788 | * @msg: Netlink message to dump into |
2789 | * @cb: Control block containing additional options | |
2790 | * @bat_priv: The bat priv with all the soft interface information | |
2791 | */ | |
2792 | static void batadv_iv_gw_dump(struct sk_buff *msg, struct netlink_callback *cb, | |
2793 | struct batadv_priv *bat_priv) | |
2794 | { | |
2795 | int portid = NETLINK_CB(cb->skb).portid; | |
2796 | struct batadv_gw_node *gw_node; | |
2797 | int idx_skip = cb->args[0]; | |
2798 | int idx = 0; | |
2799 | ||
2800 | rcu_read_lock(); | |
70ea5cee | 2801 | hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.gateway_list, list) { |
efb766af AL |
2802 | if (idx++ < idx_skip) |
2803 | continue; | |
2804 | ||
2805 | if (batadv_iv_gw_dump_entry(msg, portid, cb->nlh->nlmsg_seq, | |
2806 | bat_priv, gw_node)) { | |
2807 | idx_skip = idx - 1; | |
2808 | goto unlock; | |
2809 | } | |
2810 | } | |
2811 | ||
2812 | idx_skip = idx; | |
2813 | unlock: | |
2814 | rcu_read_unlock(); | |
2815 | ||
2816 | cb->args[0] = idx_skip; | |
2817 | } | |
2818 | ||
56303d34 | 2819 | static struct batadv_algo_ops batadv_batman_iv __read_mostly = { |
519d3497 | 2820 | .name = "BATMAN_IV", |
29824a55 AQ |
2821 | .iface = { |
2822 | .activate = batadv_iv_iface_activate, | |
2823 | .enable = batadv_iv_ogm_iface_enable, | |
2824 | .disable = batadv_iv_ogm_iface_disable, | |
2825 | .update_mac = batadv_iv_ogm_iface_update_mac, | |
2826 | .primary_set = batadv_iv_ogm_primary_iface_set, | |
2827 | }, | |
2828 | .neigh = { | |
2829 | .cmp = batadv_iv_ogm_neigh_cmp, | |
2830 | .is_similar_or_better = batadv_iv_ogm_neigh_is_sob, | |
dc1cbd14 | 2831 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
29824a55 | 2832 | .print = batadv_iv_neigh_print, |
dc1cbd14 | 2833 | #endif |
024f99cb | 2834 | .dump = batadv_iv_ogm_neigh_dump, |
29824a55 AQ |
2835 | }, |
2836 | .orig = { | |
dc1cbd14 | 2837 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
29824a55 | 2838 | .print = batadv_iv_ogm_orig_print, |
dc1cbd14 | 2839 | #endif |
024f99cb | 2840 | .dump = batadv_iv_ogm_orig_dump, |
29824a55 AQ |
2841 | .free = batadv_iv_ogm_orig_free, |
2842 | .add_if = batadv_iv_ogm_orig_add_if, | |
2843 | .del_if = batadv_iv_ogm_orig_del_if, | |
2844 | }, | |
34d99cfe | 2845 | .gw = { |
1a9070ec | 2846 | .init_sel_class = batadv_iv_init_sel_class, |
34d99cfe AQ |
2847 | .get_best_gw_node = batadv_iv_gw_get_best_gw_node, |
2848 | .is_eligible = batadv_iv_gw_is_eligible, | |
dc1cbd14 | 2849 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
34d99cfe | 2850 | .print = batadv_iv_gw_print, |
dc1cbd14 | 2851 | #endif |
efb766af | 2852 | .dump = batadv_iv_gw_dump, |
34d99cfe | 2853 | }, |
1c280471 ML |
2854 | }; |
2855 | ||
ff15c27c SE |
2856 | /** |
2857 | * batadv_iv_init() - B.A.T.M.A.N. IV initialization function | |
2858 | * | |
2859 | * Return: 0 on success or negative error number in case of failure | |
2860 | */ | |
81c524f7 | 2861 | int __init batadv_iv_init(void) |
1c280471 | 2862 | { |
c3e29312 ML |
2863 | int ret; |
2864 | ||
2865 | /* batman originator packet */ | |
acd34afa SE |
2866 | ret = batadv_recv_handler_register(BATADV_IV_OGM, |
2867 | batadv_iv_ogm_receive); | |
c3e29312 ML |
2868 | if (ret < 0) |
2869 | goto out; | |
2870 | ||
fe8bc396 | 2871 | ret = batadv_algo_register(&batadv_batman_iv); |
c3e29312 ML |
2872 | if (ret < 0) |
2873 | goto handler_unregister; | |
2874 | ||
2875 | goto out; | |
2876 | ||
2877 | handler_unregister: | |
acd34afa | 2878 | batadv_recv_handler_unregister(BATADV_IV_OGM); |
c3e29312 ML |
2879 | out: |
2880 | return ret; | |
1c280471 | 2881 | } |