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7db7d9f3 | 1 | // SPDX-License-Identifier: GPL-2.0 |
6b1aea8c | 2 | /* Copyright (C) 2007-2018 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> |
1e2c2a4f | 37 | #include <linux/netdevice.h> |
024f99cb | 38 | #include <linux/netlink.h> |
1e2c2a4f SE |
39 | #include <linux/pkt_sched.h> |
40 | #include <linux/printk.h> | |
41 | #include <linux/random.h> | |
42 | #include <linux/rculist.h> | |
43 | #include <linux/rcupdate.h> | |
44 | #include <linux/seq_file.h> | |
45 | #include <linux/skbuff.h> | |
46 | #include <linux/slab.h> | |
47 | #include <linux/spinlock.h> | |
48 | #include <linux/stddef.h> | |
49 | #include <linux/string.h> | |
50 | #include <linux/types.h> | |
51 | #include <linux/workqueue.h> | |
024f99cb MS |
52 | #include <net/genetlink.h> |
53 | #include <net/netlink.h> | |
fec149f5 | 54 | #include <uapi/linux/batadv_packet.h> |
024f99cb | 55 | #include <uapi/linux/batman_adv.h> |
1e2c2a4f | 56 | |
a2d08166 | 57 | #include "bat_algo.h" |
1e2c2a4f | 58 | #include "bitarray.h" |
34d99cfe | 59 | #include "gateway_client.h" |
1e2c2a4f SE |
60 | #include "hard-interface.h" |
61 | #include "hash.h" | |
ba412080 | 62 | #include "log.h" |
024f99cb | 63 | #include "netlink.h" |
1e2c2a4f | 64 | #include "network-coding.h" |
fc957275 ML |
65 | #include "originator.h" |
66 | #include "routing.h" | |
fc957275 | 67 | #include "send.h" |
1e2c2a4f | 68 | #include "translation-table.h" |
1f8dce49 | 69 | #include "tvlv.h" |
fc957275 | 70 | |
f0d97253 AQ |
71 | static void batadv_iv_send_outstanding_bat_ogm_packet(struct work_struct *work); |
72 | ||
791c2a2d | 73 | /** |
95298a91 | 74 | * enum batadv_dup_status - duplicate status |
791c2a2d AQ |
75 | */ |
76 | enum batadv_dup_status { | |
8b84cc4f | 77 | /** @BATADV_NO_DUP: the packet is no duplicate */ |
791c2a2d | 78 | BATADV_NO_DUP = 0, |
8b84cc4f SE |
79 | |
80 | /** | |
81 | * @BATADV_ORIG_DUP: OGM is a duplicate in the originator (but not for | |
82 | * the neighbor) | |
83 | */ | |
791c2a2d | 84 | BATADV_ORIG_DUP, |
8b84cc4f SE |
85 | |
86 | /** @BATADV_NEIGH_DUP: OGM is a duplicate for the neighbor */ | |
791c2a2d | 87 | BATADV_NEIGH_DUP, |
8b84cc4f SE |
88 | |
89 | /** | |
90 | * @BATADV_PROTECTED: originator is currently protected (after reboot) | |
91 | */ | |
791c2a2d AQ |
92 | BATADV_PROTECTED, |
93 | }; | |
94 | ||
24a5deeb | 95 | /** |
7e9a8c2c | 96 | * batadv_ring_buffer_set() - update the ring buffer with the given value |
24a5deeb AQ |
97 | * @lq_recv: pointer to the ring buffer |
98 | * @lq_index: index to store the value at | |
99 | * @value: value to store in the ring buffer | |
100 | */ | |
6b5e971a | 101 | static void batadv_ring_buffer_set(u8 lq_recv[], u8 *lq_index, u8 value) |
24a5deeb AQ |
102 | { |
103 | lq_recv[*lq_index] = value; | |
104 | *lq_index = (*lq_index + 1) % BATADV_TQ_GLOBAL_WINDOW_SIZE; | |
105 | } | |
106 | ||
107 | /** | |
7e9a8c2c | 108 | * batadv_ring_buffer_avg() - compute the average of all non-zero values stored |
24a5deeb AQ |
109 | * in the given ring buffer |
110 | * @lq_recv: pointer to the ring buffer | |
111 | * | |
62fe710f | 112 | * Return: computed average value. |
24a5deeb | 113 | */ |
6b5e971a | 114 | static u8 batadv_ring_buffer_avg(const u8 lq_recv[]) |
24a5deeb | 115 | { |
6b5e971a SE |
116 | const u8 *ptr; |
117 | u16 count = 0; | |
118 | u16 i = 0; | |
119 | u16 sum = 0; | |
24a5deeb AQ |
120 | |
121 | ptr = lq_recv; | |
122 | ||
123 | while (i < BATADV_TQ_GLOBAL_WINDOW_SIZE) { | |
124 | if (*ptr != 0) { | |
125 | count++; | |
126 | sum += *ptr; | |
127 | } | |
128 | ||
129 | i++; | |
130 | ptr++; | |
131 | } | |
132 | ||
133 | if (count == 0) | |
134 | return 0; | |
135 | ||
6b5e971a | 136 | return (u8)(sum / count); |
24a5deeb | 137 | } |
d98cae64 | 138 | |
bbad0a5e | 139 | /** |
7e9a8c2c SE |
140 | * batadv_iv_ogm_orig_get() - retrieve or create (if does not exist) an |
141 | * originator | |
bbad0a5e AQ |
142 | * @bat_priv: the bat priv with all the soft interface information |
143 | * @addr: mac address of the originator | |
144 | * | |
62fe710f | 145 | * Return: the originator object corresponding to the passed mac address or NULL |
bbad0a5e AQ |
146 | * on failure. |
147 | * If the object does not exists it is created an initialised. | |
148 | */ | |
149 | static struct batadv_orig_node * | |
6b5e971a | 150 | batadv_iv_ogm_orig_get(struct batadv_priv *bat_priv, const u8 *addr) |
bbad0a5e AQ |
151 | { |
152 | struct batadv_orig_node *orig_node; | |
f22e0893 | 153 | int hash_added; |
bbad0a5e AQ |
154 | |
155 | orig_node = batadv_orig_hash_find(bat_priv, addr); | |
156 | if (orig_node) | |
157 | return orig_node; | |
158 | ||
159 | orig_node = batadv_orig_node_new(bat_priv, addr); | |
160 | if (!orig_node) | |
161 | return NULL; | |
162 | ||
163 | spin_lock_init(&orig_node->bat_iv.ogm_cnt_lock); | |
164 | ||
55db2d59 | 165 | kref_get(&orig_node->refcount); |
bbad0a5e AQ |
166 | hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig, |
167 | batadv_choose_orig, orig_node, | |
168 | &orig_node->hash_entry); | |
169 | if (hash_added != 0) | |
55db2d59 | 170 | goto free_orig_node_hash; |
bbad0a5e AQ |
171 | |
172 | return orig_node; | |
173 | ||
55db2d59 | 174 | free_orig_node_hash: |
dee222c7 | 175 | /* reference for batadv_hash_add */ |
5d967310 | 176 | batadv_orig_node_put(orig_node); |
dee222c7 | 177 | /* reference from batadv_orig_node_new */ |
5d967310 | 178 | batadv_orig_node_put(orig_node); |
bbad0a5e AQ |
179 | |
180 | return NULL; | |
181 | } | |
182 | ||
56303d34 SE |
183 | static struct batadv_neigh_node * |
184 | batadv_iv_ogm_neigh_new(struct batadv_hard_iface *hard_iface, | |
6b5e971a | 185 | const u8 *neigh_addr, |
56303d34 | 186 | struct batadv_orig_node *orig_node, |
863dd7a8 | 187 | struct batadv_orig_node *orig_neigh) |
7ae8b285 | 188 | { |
741aa06b | 189 | struct batadv_neigh_node *neigh_node; |
7ae8b285 | 190 | |
6f0a6b5e ML |
191 | neigh_node = batadv_neigh_node_get_or_create(orig_node, |
192 | hard_iface, neigh_addr); | |
7ae8b285 ML |
193 | if (!neigh_node) |
194 | goto out; | |
195 | ||
89652331 | 196 | neigh_node->orig_node = orig_neigh; |
7ae8b285 | 197 | |
7ae8b285 ML |
198 | out: |
199 | return neigh_node; | |
200 | } | |
201 | ||
56303d34 | 202 | static int batadv_iv_ogm_iface_enable(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 203 | { |
96412690 | 204 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 205 | unsigned char *ogm_buff; |
6b5e971a | 206 | u32 random_seqno; |
d7d32ec0 ML |
207 | |
208 | /* randomize initial seqno to avoid collision */ | |
209 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
14511519 | 210 | atomic_set(&hard_iface->bat_iv.ogm_seqno, random_seqno); |
d0b9fd89 | 211 | |
14511519 ML |
212 | hard_iface->bat_iv.ogm_buff_len = BATADV_OGM_HLEN; |
213 | ogm_buff = kmalloc(hard_iface->bat_iv.ogm_buff_len, GFP_ATOMIC); | |
214 | if (!ogm_buff) | |
42d9f2cb | 215 | return -ENOMEM; |
77af7575 | 216 | |
14511519 ML |
217 | hard_iface->bat_iv.ogm_buff = ogm_buff; |
218 | ||
219 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; | |
a40d9b07 SW |
220 | batadv_ogm_packet->packet_type = BATADV_IV_OGM; |
221 | batadv_ogm_packet->version = BATADV_COMPAT_VERSION; | |
222 | batadv_ogm_packet->ttl = 2; | |
96412690 | 223 | batadv_ogm_packet->flags = BATADV_NO_FLAGS; |
414254e3 | 224 | batadv_ogm_packet->reserved = 0; |
96412690 | 225 | batadv_ogm_packet->tq = BATADV_TQ_MAX_VALUE; |
77af7575 | 226 | |
42d9f2cb | 227 | return 0; |
d0b9fd89 ML |
228 | } |
229 | ||
56303d34 | 230 | static void batadv_iv_ogm_iface_disable(struct batadv_hard_iface *hard_iface) |
00a50076 | 231 | { |
14511519 ML |
232 | kfree(hard_iface->bat_iv.ogm_buff); |
233 | hard_iface->bat_iv.ogm_buff = NULL; | |
00a50076 ML |
234 | } |
235 | ||
56303d34 | 236 | static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 237 | { |
96412690 | 238 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 239 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 240 | |
14511519 | 241 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
8fdd0153 AQ |
242 | ether_addr_copy(batadv_ogm_packet->orig, |
243 | hard_iface->net_dev->dev_addr); | |
244 | ether_addr_copy(batadv_ogm_packet->prev_sender, | |
245 | hard_iface->net_dev->dev_addr); | |
d0b9fd89 ML |
246 | } |
247 | ||
56303d34 SE |
248 | static void |
249 | batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface) | |
d0b9fd89 | 250 | { |
96412690 | 251 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 252 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 253 | |
14511519 | 254 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
a40d9b07 | 255 | batadv_ogm_packet->ttl = BATADV_TTL; |
d0b9fd89 ML |
256 | } |
257 | ||
b9dacc52 | 258 | /* when do we schedule our own ogm to be sent */ |
fe8bc396 | 259 | static unsigned long |
56303d34 | 260 | batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv) |
b9dacc52 | 261 | { |
42d0b044 SE |
262 | unsigned int msecs; |
263 | ||
264 | msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER; | |
e76e4320 | 265 | msecs += prandom_u32() % (2 * BATADV_JITTER); |
42d0b044 SE |
266 | |
267 | return jiffies + msecs_to_jiffies(msecs); | |
b9dacc52 ML |
268 | } |
269 | ||
270 | /* when do we schedule a ogm packet to be sent */ | |
fe8bc396 | 271 | static unsigned long batadv_iv_ogm_fwd_send_time(void) |
b9dacc52 | 272 | { |
e76e4320 | 273 | return jiffies + msecs_to_jiffies(prandom_u32() % (BATADV_JITTER / 2)); |
b9dacc52 ML |
274 | } |
275 | ||
276 | /* apply hop penalty for a normal link */ | |
6b5e971a | 277 | static u8 batadv_hop_penalty(u8 tq, const struct batadv_priv *bat_priv) |
b9dacc52 ML |
278 | { |
279 | int hop_penalty = atomic_read(&bat_priv->hop_penalty); | |
42d0b044 SE |
280 | int new_tq; |
281 | ||
282 | new_tq = tq * (BATADV_TQ_MAX_VALUE - hop_penalty); | |
283 | new_tq /= BATADV_TQ_MAX_VALUE; | |
284 | ||
285 | return new_tq; | |
b9dacc52 ML |
286 | } |
287 | ||
600184b7 | 288 | /** |
7e9a8c2c | 289 | * batadv_iv_ogm_aggr_packet() - checks if there is another OGM attached |
600184b7 SW |
290 | * @buff_pos: current position in the skb |
291 | * @packet_len: total length of the skb | |
292 | * @tvlv_len: tvlv length of the previously considered OGM | |
293 | * | |
294 | * Return: true if there is enough space for another OGM, false otherwise. | |
295 | */ | |
9fd9b19e MP |
296 | static bool batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len, |
297 | __be16 tvlv_len) | |
fc957275 | 298 | { |
08c36d3e SE |
299 | int next_buff_pos = 0; |
300 | ||
7e071c79 | 301 | next_buff_pos += buff_pos + BATADV_OGM_HLEN; |
ef261577 | 302 | next_buff_pos += ntohs(tvlv_len); |
fc957275 ML |
303 | |
304 | return (next_buff_pos <= packet_len) && | |
42d0b044 | 305 | (next_buff_pos <= BATADV_MAX_AGGREGATION_BYTES); |
fc957275 ML |
306 | } |
307 | ||
b9dacc52 | 308 | /* send a batman ogm to a given interface */ |
56303d34 SE |
309 | static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, |
310 | struct batadv_hard_iface *hard_iface) | |
b9dacc52 | 311 | { |
56303d34 | 312 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
de12baec | 313 | const char *fwd_str; |
6b5e971a SE |
314 | u8 packet_num; |
315 | s16 buff_pos; | |
96412690 | 316 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 317 | struct sk_buff *skb; |
6b5e971a | 318 | u8 *packet_pos; |
b9dacc52 | 319 | |
e9a4f295 | 320 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
b9dacc52 ML |
321 | return; |
322 | ||
323 | packet_num = 0; | |
324 | buff_pos = 0; | |
c67893d1 SE |
325 | packet_pos = forw_packet->skb->data; |
326 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
327 | |
328 | /* adjust all flags and log packets */ | |
fe8bc396 | 329 | while (batadv_iv_ogm_aggr_packet(buff_pos, forw_packet->packet_len, |
ef261577 | 330 | batadv_ogm_packet->tvlv_len)) { |
b9dacc52 | 331 | /* we might have aggregated direct link packets with an |
9cfc7bd6 SE |
332 | * ordinary base packet |
333 | */ | |
8de47de5 SE |
334 | if (forw_packet->direct_link_flags & BIT(packet_num) && |
335 | forw_packet->if_incoming == hard_iface) | |
96412690 | 336 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 337 | else |
96412690 | 338 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 339 | |
c67893d1 SE |
340 | if (packet_num > 0 || !forw_packet->own) |
341 | fwd_str = "Forwarding"; | |
342 | else | |
343 | fwd_str = "Sending own"; | |
344 | ||
39c75a51 | 345 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
e1bf0c14 | 346 | "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s) on interface %s [%pM]\n", |
1eda58bf | 347 | fwd_str, (packet_num > 0 ? "aggregated " : ""), |
96412690 SE |
348 | batadv_ogm_packet->orig, |
349 | ntohl(batadv_ogm_packet->seqno), | |
a40d9b07 | 350 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl, |
a2f2b6cd | 351 | ((batadv_ogm_packet->flags & BATADV_DIRECTLINK) ? |
1eda58bf | 352 | "on" : "off"), |
e1bf0c14 | 353 | hard_iface->net_dev->name, |
1eda58bf | 354 | hard_iface->net_dev->dev_addr); |
b9dacc52 | 355 | |
7e071c79 | 356 | buff_pos += BATADV_OGM_HLEN; |
ef261577 | 357 | buff_pos += ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 358 | packet_num++; |
c67893d1 SE |
359 | packet_pos = forw_packet->skb->data + buff_pos; |
360 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
361 | } |
362 | ||
363 | /* create clone because function is called more than once */ | |
364 | skb = skb_clone(forw_packet->skb, GFP_ATOMIC); | |
f8214865 | 365 | if (skb) { |
d69909d2 SE |
366 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_TX); |
367 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_TX_BYTES, | |
f8214865 | 368 | skb->len + ETH_HLEN); |
95d39278 | 369 | batadv_send_broadcast_skb(skb, hard_iface); |
f8214865 | 370 | } |
b9dacc52 ML |
371 | } |
372 | ||
373 | /* send a batman ogm packet */ | |
56303d34 | 374 | static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) |
b9dacc52 | 375 | { |
b9dacc52 | 376 | struct net_device *soft_iface; |
b9dacc52 ML |
377 | |
378 | if (!forw_packet->if_incoming) { | |
86ceb360 | 379 | pr_err("Error - can't forward packet: incoming iface not specified\n"); |
f55a2e84 | 380 | return; |
b9dacc52 ML |
381 | } |
382 | ||
383 | soft_iface = forw_packet->if_incoming->soft_iface; | |
b9dacc52 | 384 | |
ef0a937f | 385 | if (WARN_ON(!forw_packet->if_outgoing)) |
f55a2e84 | 386 | return; |
b9dacc52 | 387 | |
ef0a937f | 388 | if (WARN_ON(forw_packet->if_outgoing->soft_iface != soft_iface)) |
f55a2e84 | 389 | return; |
b9dacc52 | 390 | |
ef0a937f | 391 | if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) |
f55a2e84 | 392 | return; |
b9dacc52 | 393 | |
ef0a937f SW |
394 | /* only for one specific outgoing interface */ |
395 | batadv_iv_ogm_send_to_if(forw_packet, forw_packet->if_outgoing); | |
b9dacc52 ML |
396 | } |
397 | ||
ef0a937f | 398 | /** |
7e9a8c2c | 399 | * batadv_iv_ogm_can_aggregate() - find out if an OGM can be aggregated on an |
ef0a937f SW |
400 | * existing forward packet |
401 | * @new_bat_ogm_packet: OGM packet to be aggregated | |
402 | * @bat_priv: the bat priv with all the soft interface information | |
403 | * @packet_len: (total) length of the OGM | |
404 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
95298a91 | 405 | * @directlink: true if this is a direct link packet |
ef0a937f SW |
406 | * @if_incoming: interface where the packet was received |
407 | * @if_outgoing: interface for which the retransmission should be considered | |
408 | * @forw_packet: the forwarded packet which should be checked | |
409 | * | |
62fe710f | 410 | * Return: true if new_packet can be aggregated with forw_packet |
ef0a937f | 411 | */ |
fe8bc396 | 412 | static bool |
96412690 | 413 | batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, |
56303d34 | 414 | struct batadv_priv *bat_priv, |
fe8bc396 SE |
415 | int packet_len, unsigned long send_time, |
416 | bool directlink, | |
56303d34 | 417 | const struct batadv_hard_iface *if_incoming, |
ef0a937f | 418 | const struct batadv_hard_iface *if_outgoing, |
56303d34 | 419 | const struct batadv_forw_packet *forw_packet) |
b9dacc52 | 420 | { |
96412690 | 421 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 422 | int aggregated_bytes = forw_packet->packet_len + packet_len; |
56303d34 | 423 | struct batadv_hard_iface *primary_if = NULL; |
b9dacc52 | 424 | bool res = false; |
42d0b044 | 425 | unsigned long aggregation_end_time; |
b9dacc52 | 426 | |
96412690 | 427 | batadv_ogm_packet = (struct batadv_ogm_packet *)forw_packet->skb->data; |
42d0b044 SE |
428 | aggregation_end_time = send_time; |
429 | aggregation_end_time += msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); | |
b9dacc52 | 430 | |
9cfc7bd6 | 431 | /* we can aggregate the current packet to this aggregated packet |
b9dacc52 ML |
432 | * if: |
433 | * | |
434 | * - the send time is within our MAX_AGGREGATION_MS time | |
435 | * - the resulting packet wont be bigger than | |
436 | * MAX_AGGREGATION_BYTES | |
8f34b388 | 437 | * otherwise aggregation is not possible |
b9dacc52 | 438 | */ |
8f34b388 MP |
439 | if (!time_before(send_time, forw_packet->send_time) || |
440 | !time_after_eq(aggregation_end_time, forw_packet->send_time)) | |
441 | return false; | |
442 | ||
443 | if (aggregated_bytes > BATADV_MAX_AGGREGATION_BYTES) | |
444 | return false; | |
445 | ||
446 | /* packet is not leaving on the same interface. */ | |
447 | if (forw_packet->if_outgoing != if_outgoing) | |
448 | return false; | |
449 | ||
450 | /* check aggregation compatibility | |
451 | * -> direct link packets are broadcasted on | |
452 | * their interface only | |
453 | * -> aggregate packet if the current packet is | |
454 | * a "global" packet as well as the base | |
455 | * packet | |
456 | */ | |
457 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
458 | if (!primary_if) | |
459 | return false; | |
ef0a937f | 460 | |
8f34b388 MP |
461 | /* packets without direct link flag and high TTL |
462 | * are flooded through the net | |
463 | */ | |
464 | if (!directlink && | |
465 | !(batadv_ogm_packet->flags & BATADV_DIRECTLINK) && | |
466 | batadv_ogm_packet->ttl != 1 && | |
467 | ||
468 | /* own packets originating non-primary | |
469 | * interfaces leave only that interface | |
470 | */ | |
471 | (!forw_packet->own || | |
472 | forw_packet->if_incoming == primary_if)) { | |
473 | res = true; | |
474 | goto out; | |
475 | } | |
b9dacc52 | 476 | |
8f34b388 MP |
477 | /* if the incoming packet is sent via this one |
478 | * interface only - we still can aggregate | |
479 | */ | |
480 | if (directlink && | |
481 | new_bat_ogm_packet->ttl == 1 && | |
482 | forw_packet->if_incoming == if_incoming && | |
483 | ||
484 | /* packets from direct neighbors or | |
485 | * own secondary interface packets | |
486 | * (= secondary interface packets in general) | |
487 | */ | |
488 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK || | |
489 | (forw_packet->own && | |
490 | forw_packet->if_incoming != primary_if))) { | |
491 | res = true; | |
492 | goto out; | |
b9dacc52 ML |
493 | } |
494 | ||
495 | out: | |
496 | if (primary_if) | |
82047ad7 | 497 | batadv_hardif_put(primary_if); |
b9dacc52 ML |
498 | return res; |
499 | } | |
500 | ||
1b371d13 | 501 | /** |
7e9a8c2c | 502 | * batadv_iv_ogm_aggregate_new() - create a new aggregated packet and add this |
ef0a937f SW |
503 | * packet to it. |
504 | * @packet_buff: pointer to the OGM | |
505 | * @packet_len: (total) length of the OGM | |
506 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
507 | * @direct_link: whether this OGM has direct link status | |
508 | * @if_incoming: interface where the packet was received | |
509 | * @if_outgoing: interface for which the retransmission should be considered | |
510 | * @own_packet: true if it is a self-generated ogm | |
511 | */ | |
fe8bc396 SE |
512 | static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, |
513 | int packet_len, unsigned long send_time, | |
514 | bool direct_link, | |
56303d34 | 515 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 516 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 517 | int own_packet) |
b9dacc52 | 518 | { |
56303d34 SE |
519 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
520 | struct batadv_forw_packet *forw_packet_aggr; | |
99ba18ef | 521 | struct sk_buff *skb; |
b9dacc52 | 522 | unsigned char *skb_buff; |
42d0b044 | 523 | unsigned int skb_size; |
a65e5481 | 524 | atomic_t *queue_left = own_packet ? NULL : &bat_priv->batman_queue_left; |
b9dacc52 | 525 | |
940d156f MP |
526 | if (atomic_read(&bat_priv->aggregated_ogms) && |
527 | packet_len < BATADV_MAX_AGGREGATION_BYTES) | |
5b246574 | 528 | skb_size = BATADV_MAX_AGGREGATION_BYTES; |
b9dacc52 | 529 | else |
5b246574 SE |
530 | skb_size = packet_len; |
531 | ||
41ab6c48 | 532 | skb_size += ETH_HLEN; |
b9dacc52 | 533 | |
99ba18ef LL |
534 | skb = netdev_alloc_skb_ip_align(NULL, skb_size); |
535 | if (!skb) | |
536 | return; | |
537 | ||
538 | forw_packet_aggr = batadv_forw_packet_alloc(if_incoming, if_outgoing, | |
539 | queue_left, bat_priv, skb); | |
540 | if (!forw_packet_aggr) { | |
541 | kfree_skb(skb); | |
a65e5481 LL |
542 | return; |
543 | } | |
544 | ||
c54f38c9 | 545 | forw_packet_aggr->skb->priority = TC_PRIO_CONTROL; |
41ab6c48 | 546 | skb_reserve(forw_packet_aggr->skb, ETH_HLEN); |
b9dacc52 | 547 | |
b9dacc52 ML |
548 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); |
549 | forw_packet_aggr->packet_len = packet_len; | |
550 | memcpy(skb_buff, packet_buff, packet_len); | |
551 | ||
552 | forw_packet_aggr->own = own_packet; | |
42d0b044 | 553 | forw_packet_aggr->direct_link_flags = BATADV_NO_FLAGS; |
b9dacc52 ML |
554 | forw_packet_aggr->send_time = send_time; |
555 | ||
556 | /* save packet direct link flag status */ | |
557 | if (direct_link) | |
558 | forw_packet_aggr->direct_link_flags |= 1; | |
559 | ||
b9dacc52 | 560 | INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work, |
f0d97253 | 561 | batadv_iv_send_outstanding_bat_ogm_packet); |
9b4aec64 LL |
562 | |
563 | batadv_forw_packet_ogmv1_queue(bat_priv, forw_packet_aggr, send_time); | |
b9dacc52 ML |
564 | } |
565 | ||
566 | /* aggregate a new packet into the existing ogm packet */ | |
56303d34 | 567 | static void batadv_iv_ogm_aggregate(struct batadv_forw_packet *forw_packet_aggr, |
fe8bc396 SE |
568 | const unsigned char *packet_buff, |
569 | int packet_len, bool direct_link) | |
b9dacc52 | 570 | { |
8de47de5 | 571 | unsigned long new_direct_link_flag; |
b9dacc52 | 572 | |
e04de486 | 573 | skb_put_data(forw_packet_aggr->skb, packet_buff, packet_len); |
b9dacc52 ML |
574 | forw_packet_aggr->packet_len += packet_len; |
575 | forw_packet_aggr->num_packets++; | |
576 | ||
577 | /* save packet direct link flag status */ | |
8de47de5 SE |
578 | if (direct_link) { |
579 | new_direct_link_flag = BIT(forw_packet_aggr->num_packets); | |
580 | forw_packet_aggr->direct_link_flags |= new_direct_link_flag; | |
581 | } | |
b9dacc52 ML |
582 | } |
583 | ||
ef0a937f | 584 | /** |
7e9a8c2c | 585 | * batadv_iv_ogm_queue_add() - queue up an OGM for transmission |
ef0a937f SW |
586 | * @bat_priv: the bat priv with all the soft interface information |
587 | * @packet_buff: pointer to the OGM | |
588 | * @packet_len: (total) length of the OGM | |
589 | * @if_incoming: interface where the packet was received | |
590 | * @if_outgoing: interface for which the retransmission should be considered | |
591 | * @own_packet: true if it is a self-generated ogm | |
592 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
593 | */ | |
56303d34 | 594 | static void batadv_iv_ogm_queue_add(struct batadv_priv *bat_priv, |
fe8bc396 SE |
595 | unsigned char *packet_buff, |
596 | int packet_len, | |
56303d34 | 597 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 598 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 599 | int own_packet, unsigned long send_time) |
b9dacc52 | 600 | { |
9cfc7bd6 | 601 | /* _aggr -> pointer to the packet we want to aggregate with |
b9dacc52 ML |
602 | * _pos -> pointer to the position in the queue |
603 | */ | |
56303d34 SE |
604 | struct batadv_forw_packet *forw_packet_aggr = NULL; |
605 | struct batadv_forw_packet *forw_packet_pos = NULL; | |
96412690 | 606 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 607 | bool direct_link; |
42d0b044 | 608 | unsigned long max_aggregation_jiffies; |
b9dacc52 | 609 | |
96412690 | 610 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
56489151 | 611 | direct_link = !!(batadv_ogm_packet->flags & BATADV_DIRECTLINK); |
42d0b044 | 612 | max_aggregation_jiffies = msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); |
b9dacc52 ML |
613 | |
614 | /* find position for the packet in the forward queue */ | |
615 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
616 | /* own packets are not to be aggregated */ | |
56489151 | 617 | if (atomic_read(&bat_priv->aggregated_ogms) && !own_packet) { |
b67bfe0d | 618 | hlist_for_each_entry(forw_packet_pos, |
b9dacc52 | 619 | &bat_priv->forw_bat_list, list) { |
96412690 | 620 | if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet, |
fe8bc396 SE |
621 | bat_priv, packet_len, |
622 | send_time, direct_link, | |
623 | if_incoming, | |
ef0a937f | 624 | if_outgoing, |
fe8bc396 | 625 | forw_packet_pos)) { |
b9dacc52 ML |
626 | forw_packet_aggr = forw_packet_pos; |
627 | break; | |
628 | } | |
629 | } | |
630 | } | |
631 | ||
632 | /* nothing to aggregate with - either aggregation disabled or no | |
9cfc7bd6 SE |
633 | * suitable aggregation packet found |
634 | */ | |
b9dacc52 ML |
635 | if (!forw_packet_aggr) { |
636 | /* the following section can run without the lock */ | |
637 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
638 | ||
9cfc7bd6 | 639 | /* if we could not aggregate this packet with one of the others |
b9dacc52 ML |
640 | * we hold it back for a while, so that it might be aggregated |
641 | * later on | |
642 | */ | |
42d0b044 SE |
643 | if (!own_packet && atomic_read(&bat_priv->aggregated_ogms)) |
644 | send_time += max_aggregation_jiffies; | |
b9dacc52 | 645 | |
fe8bc396 SE |
646 | batadv_iv_ogm_aggregate_new(packet_buff, packet_len, |
647 | send_time, direct_link, | |
ef0a937f SW |
648 | if_incoming, if_outgoing, |
649 | own_packet); | |
b9dacc52 | 650 | } else { |
fe8bc396 SE |
651 | batadv_iv_ogm_aggregate(forw_packet_aggr, packet_buff, |
652 | packet_len, direct_link); | |
b9dacc52 ML |
653 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
654 | } | |
655 | } | |
656 | ||
56303d34 | 657 | static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, |
fe8bc396 | 658 | const struct ethhdr *ethhdr, |
96412690 | 659 | struct batadv_ogm_packet *batadv_ogm_packet, |
fe8bc396 SE |
660 | bool is_single_hop_neigh, |
661 | bool is_from_best_next_hop, | |
ef0a937f SW |
662 | struct batadv_hard_iface *if_incoming, |
663 | struct batadv_hard_iface *if_outgoing) | |
b9dacc52 | 664 | { |
56303d34 | 665 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
6b5e971a | 666 | u16 tvlv_len; |
b9dacc52 | 667 | |
a40d9b07 | 668 | if (batadv_ogm_packet->ttl <= 1) { |
39c75a51 | 669 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n"); |
b9dacc52 ML |
670 | return; |
671 | } | |
672 | ||
13b2541b ML |
673 | if (!is_from_best_next_hop) { |
674 | /* Mark the forwarded packet when it is not coming from our | |
675 | * best next hop. We still need to forward the packet for our | |
676 | * neighbor link quality detection to work in case the packet | |
677 | * originated from a single hop neighbor. Otherwise we can | |
678 | * simply drop the ogm. | |
679 | */ | |
680 | if (is_single_hop_neigh) | |
96412690 | 681 | batadv_ogm_packet->flags |= BATADV_NOT_BEST_NEXT_HOP; |
13b2541b ML |
682 | else |
683 | return; | |
684 | } | |
b9dacc52 | 685 | |
ef261577 | 686 | tvlv_len = ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 687 | |
a40d9b07 | 688 | batadv_ogm_packet->ttl--; |
8fdd0153 | 689 | ether_addr_copy(batadv_ogm_packet->prev_sender, ethhdr->h_source); |
b9dacc52 | 690 | |
b9dacc52 | 691 | /* apply hop penalty */ |
96412690 | 692 | batadv_ogm_packet->tq = batadv_hop_penalty(batadv_ogm_packet->tq, |
fe8bc396 | 693 | bat_priv); |
b9dacc52 | 694 | |
39c75a51 | 695 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 696 | "Forwarding packet: tq: %i, ttl: %i\n", |
a40d9b07 | 697 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl); |
b9dacc52 | 698 | |
75cd33f8 | 699 | if (is_single_hop_neigh) |
96412690 | 700 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 701 | else |
96412690 | 702 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 703 | |
96412690 | 704 | batadv_iv_ogm_queue_add(bat_priv, (unsigned char *)batadv_ogm_packet, |
ef261577 | 705 | BATADV_OGM_HLEN + tvlv_len, |
ef0a937f SW |
706 | if_incoming, if_outgoing, 0, |
707 | batadv_iv_ogm_fwd_send_time()); | |
b9dacc52 ML |
708 | } |
709 | ||
d9896617 | 710 | /** |
7e9a8c2c SE |
711 | * batadv_iv_ogm_slide_own_bcast_window() - bitshift own OGM broadcast windows |
712 | * for the given interface | |
d9896617 AQ |
713 | * @hard_iface: the interface for which the windows have to be shifted |
714 | */ | |
715 | static void | |
716 | batadv_iv_ogm_slide_own_bcast_window(struct batadv_hard_iface *hard_iface) | |
717 | { | |
718 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); | |
719 | struct batadv_hashtable *hash = bat_priv->orig_hash; | |
720 | struct hlist_head *head; | |
721 | struct batadv_orig_node *orig_node; | |
dee222c7 | 722 | struct batadv_orig_ifinfo *orig_ifinfo; |
d9896617 | 723 | unsigned long *word; |
6b5e971a | 724 | u32 i; |
6b5e971a | 725 | u8 *w; |
d9896617 AQ |
726 | |
727 | for (i = 0; i < hash->size; i++) { | |
728 | head = &hash->table[i]; | |
729 | ||
730 | rcu_read_lock(); | |
731 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
dee222c7 SE |
732 | hlist_for_each_entry_rcu(orig_ifinfo, |
733 | &orig_node->ifinfo_list, | |
734 | list) { | |
735 | if (orig_ifinfo->if_outgoing != hard_iface) | |
736 | continue; | |
737 | ||
738 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
739 | word = orig_ifinfo->bat_iv.bcast_own; | |
740 | batadv_bit_get_packet(bat_priv, word, 1, 0); | |
741 | w = &orig_ifinfo->bat_iv.bcast_own_sum; | |
742 | *w = bitmap_weight(word, | |
743 | BATADV_TQ_LOCAL_WINDOW_SIZE); | |
744 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
745 | } | |
d9896617 AQ |
746 | } |
747 | rcu_read_unlock(); | |
748 | } | |
749 | } | |
750 | ||
56303d34 | 751 | static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) |
b9dacc52 | 752 | { |
56303d34 | 753 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
14511519 | 754 | unsigned char **ogm_buff = &hard_iface->bat_iv.ogm_buff; |
96412690 | 755 | struct batadv_ogm_packet *batadv_ogm_packet; |
ef0a937f | 756 | struct batadv_hard_iface *primary_if, *tmp_hard_iface; |
14511519 | 757 | int *ogm_buff_len = &hard_iface->bat_iv.ogm_buff_len; |
6b5e971a SE |
758 | u32 seqno; |
759 | u16 tvlv_len = 0; | |
ef0a937f | 760 | unsigned long send_time; |
b9dacc52 | 761 | |
825ffe1f SE |
762 | if (hard_iface->if_status == BATADV_IF_NOT_IN_USE || |
763 | hard_iface->if_status == BATADV_IF_TO_BE_REMOVED) | |
f0d97253 AQ |
764 | return; |
765 | ||
766 | /* the interface gets activated here to avoid race conditions between | |
767 | * the moment of activating the interface in | |
768 | * hardif_activate_interface() where the originator mac is set and | |
769 | * outdated packets (especially uninitialized mac addresses) in the | |
770 | * packet queue | |
771 | */ | |
772 | if (hard_iface->if_status == BATADV_IF_TO_BE_ACTIVATED) | |
773 | hard_iface->if_status = BATADV_IF_ACTIVE; | |
774 | ||
e5d89254 | 775 | primary_if = batadv_primary_if_get_selected(bat_priv); |
b9dacc52 | 776 | |
e1bf0c14 ML |
777 | if (hard_iface == primary_if) { |
778 | /* tt changes have to be committed before the tvlv data is | |
779 | * appended as it may alter the tt tvlv container | |
780 | */ | |
781 | batadv_tt_local_commit_changes(bat_priv); | |
ef261577 ML |
782 | tvlv_len = batadv_tvlv_container_ogm_append(bat_priv, ogm_buff, |
783 | ogm_buff_len, | |
784 | BATADV_OGM_HLEN); | |
e1bf0c14 | 785 | } |
be9aa4c1 | 786 | |
14511519 | 787 | batadv_ogm_packet = (struct batadv_ogm_packet *)(*ogm_buff); |
ef261577 | 788 | batadv_ogm_packet->tvlv_len = htons(tvlv_len); |
b9dacc52 ML |
789 | |
790 | /* change sequence number to network order */ | |
6b5e971a | 791 | seqno = (u32)atomic_read(&hard_iface->bat_iv.ogm_seqno); |
bbb1f90e | 792 | batadv_ogm_packet->seqno = htonl(seqno); |
14511519 | 793 | atomic_inc(&hard_iface->bat_iv.ogm_seqno); |
b9dacc52 | 794 | |
d9896617 | 795 | batadv_iv_ogm_slide_own_bcast_window(hard_iface); |
b9dacc52 | 796 | |
ef0a937f SW |
797 | send_time = batadv_iv_ogm_emit_send_time(bat_priv); |
798 | ||
799 | if (hard_iface != primary_if) { | |
800 | /* OGMs from secondary interfaces are only scheduled on their | |
801 | * respective interfaces. | |
802 | */ | |
803 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, *ogm_buff_len, | |
804 | hard_iface, hard_iface, 1, send_time); | |
805 | goto out; | |
806 | } | |
807 | ||
808 | /* OGMs from primary interfaces are scheduled on all | |
809 | * interfaces. | |
810 | */ | |
811 | rcu_read_lock(); | |
812 | list_for_each_entry_rcu(tmp_hard_iface, &batadv_hardif_list, list) { | |
813 | if (tmp_hard_iface->soft_iface != hard_iface->soft_iface) | |
87b40f53 | 814 | continue; |
27353446 SE |
815 | |
816 | if (!kref_get_unless_zero(&tmp_hard_iface->refcount)) | |
817 | continue; | |
818 | ||
ef0a937f SW |
819 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, |
820 | *ogm_buff_len, hard_iface, | |
821 | tmp_hard_iface, 1, send_time); | |
27353446 SE |
822 | |
823 | batadv_hardif_put(tmp_hard_iface); | |
ef0a937f SW |
824 | } |
825 | rcu_read_unlock(); | |
826 | ||
827 | out: | |
b9dacc52 | 828 | if (primary_if) |
82047ad7 | 829 | batadv_hardif_put(primary_if); |
b9dacc52 ML |
830 | } |
831 | ||
dee222c7 SE |
832 | /** |
833 | * batadv_iv_orig_ifinfo_sum() - Get bcast_own sum for originator over iterface | |
834 | * @orig_node: originator which reproadcasted the OGMs directly | |
835 | * @if_outgoing: interface which transmitted the original OGM and received the | |
836 | * direct rebroadcast | |
837 | * | |
838 | * Return: Number of replied (rebroadcasted) OGMs which were transmitted by | |
839 | * an originator and directly (without intermediate hop) received by a specific | |
840 | * interface | |
841 | */ | |
842 | static u8 batadv_iv_orig_ifinfo_sum(struct batadv_orig_node *orig_node, | |
843 | struct batadv_hard_iface *if_outgoing) | |
844 | { | |
845 | struct batadv_orig_ifinfo *orig_ifinfo; | |
846 | u8 sum; | |
847 | ||
848 | orig_ifinfo = batadv_orig_ifinfo_get(orig_node, if_outgoing); | |
849 | if (!orig_ifinfo) | |
850 | return 0; | |
851 | ||
852 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
853 | sum = orig_ifinfo->bat_iv.bcast_own_sum; | |
854 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
855 | ||
856 | batadv_orig_ifinfo_put(orig_ifinfo); | |
857 | ||
858 | return sum; | |
859 | } | |
860 | ||
89652331 | 861 | /** |
7e9a8c2c | 862 | * batadv_iv_ogm_orig_update() - use OGM to update corresponding data in an |
89652331 SW |
863 | * originator |
864 | * @bat_priv: the bat priv with all the soft interface information | |
865 | * @orig_node: the orig node who originally emitted the ogm packet | |
7351a482 | 866 | * @orig_ifinfo: ifinfo for the outgoing interface of the orig_node |
89652331 SW |
867 | * @ethhdr: Ethernet header of the OGM |
868 | * @batadv_ogm_packet: the ogm packet | |
869 | * @if_incoming: interface where the packet was received | |
870 | * @if_outgoing: interface for which the retransmission should be considered | |
89652331 SW |
871 | * @dup_status: the duplicate status of this ogm packet. |
872 | */ | |
fe8bc396 | 873 | static void |
56303d34 SE |
874 | batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, |
875 | struct batadv_orig_node *orig_node, | |
7351a482 | 876 | struct batadv_orig_ifinfo *orig_ifinfo, |
fe8bc396 | 877 | const struct ethhdr *ethhdr, |
96412690 | 878 | const struct batadv_ogm_packet *batadv_ogm_packet, |
56303d34 | 879 | struct batadv_hard_iface *if_incoming, |
89652331 | 880 | struct batadv_hard_iface *if_outgoing, |
7c24bbbe | 881 | enum batadv_dup_status dup_status) |
fc957275 | 882 | { |
89652331 SW |
883 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL; |
884 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; | |
4f248cff SE |
885 | struct batadv_neigh_node *neigh_node = NULL; |
886 | struct batadv_neigh_node *tmp_neigh_node = NULL; | |
56303d34 | 887 | struct batadv_neigh_node *router = NULL; |
6b5e971a SE |
888 | u8 sum_orig, sum_neigh; |
889 | u8 *neigh_addr; | |
890 | u8 tq_avg; | |
fc957275 | 891 | |
39c75a51 | 892 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
22f0502e SE |
893 | "%s(): Searching and updating originator entry of received packet\n", |
894 | __func__); | |
fc957275 ML |
895 | |
896 | rcu_read_lock(); | |
b67bfe0d | 897 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 898 | &orig_node->neigh_list, list) { |
1eda58bf SE |
899 | neigh_addr = tmp_neigh_node->addr; |
900 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && | |
901 | tmp_neigh_node->if_incoming == if_incoming && | |
77ae32e8 | 902 | kref_get_unless_zero(&tmp_neigh_node->refcount)) { |
38dc40ef | 903 | if (WARN(neigh_node, "too many matching neigh_nodes")) |
25bb2509 | 904 | batadv_neigh_node_put(neigh_node); |
fc957275 ML |
905 | neigh_node = tmp_neigh_node; |
906 | continue; | |
907 | } | |
908 | ||
7c24bbbe | 909 | if (dup_status != BATADV_NO_DUP) |
fc957275 ML |
910 | continue; |
911 | ||
89652331 SW |
912 | /* only update the entry for this outgoing interface */ |
913 | neigh_ifinfo = batadv_neigh_ifinfo_get(tmp_neigh_node, | |
914 | if_outgoing); | |
915 | if (!neigh_ifinfo) | |
916 | continue; | |
917 | ||
918 | spin_lock_bh(&tmp_neigh_node->ifinfo_lock); | |
919 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
920 | &neigh_ifinfo->bat_iv.tq_index, 0); | |
921 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); | |
922 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
923 | spin_unlock_bh(&tmp_neigh_node->ifinfo_lock); | |
924 | ||
044fa3ae | 925 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 | 926 | neigh_ifinfo = NULL; |
fc957275 ML |
927 | } |
928 | ||
929 | if (!neigh_node) { | |
56303d34 | 930 | struct batadv_orig_node *orig_tmp; |
fc957275 | 931 | |
bbad0a5e | 932 | orig_tmp = batadv_iv_ogm_orig_get(bat_priv, ethhdr->h_source); |
fc957275 ML |
933 | if (!orig_tmp) |
934 | goto unlock; | |
935 | ||
fe8bc396 SE |
936 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
937 | ethhdr->h_source, | |
863dd7a8 | 938 | orig_node, orig_tmp); |
fc957275 | 939 | |
5d967310 | 940 | batadv_orig_node_put(orig_tmp); |
fc957275 ML |
941 | if (!neigh_node) |
942 | goto unlock; | |
23badd6d | 943 | } else { |
39c75a51 | 944 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 945 | "Updating existing last-hop neighbor of originator\n"); |
23badd6d | 946 | } |
fc957275 ML |
947 | |
948 | rcu_read_unlock(); | |
89652331 SW |
949 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
950 | if (!neigh_ifinfo) | |
951 | goto out; | |
fc957275 | 952 | |
d7b2a97e | 953 | neigh_node->last_seen = jiffies; |
fc957275 | 954 | |
89652331 SW |
955 | spin_lock_bh(&neigh_node->ifinfo_lock); |
956 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
957 | &neigh_ifinfo->bat_iv.tq_index, | |
96412690 | 958 | batadv_ogm_packet->tq); |
89652331 SW |
959 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); |
960 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
961 | spin_unlock_bh(&neigh_node->ifinfo_lock); | |
fc957275 | 962 | |
7c24bbbe | 963 | if (dup_status == BATADV_NO_DUP) { |
7351a482 | 964 | orig_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
89652331 | 965 | neigh_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
fc957275 ML |
966 | } |
967 | ||
fc957275 | 968 | /* if this neighbor already is our next hop there is nothing |
9cfc7bd6 SE |
969 | * to change |
970 | */ | |
7351a482 | 971 | router = batadv_orig_router_get(orig_node, if_outgoing); |
fc957275 | 972 | if (router == neigh_node) |
e1bf0c14 | 973 | goto out; |
fc957275 | 974 | |
89652331 SW |
975 | if (router) { |
976 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
977 | if (!router_ifinfo) | |
978 | goto out; | |
979 | ||
980 | /* if this neighbor does not offer a better TQ we won't | |
981 | * consider it | |
982 | */ | |
983 | if (router_ifinfo->bat_iv.tq_avg > neigh_ifinfo->bat_iv.tq_avg) | |
984 | goto out; | |
985 | } | |
fc957275 ML |
986 | |
987 | /* if the TQ is the same and the link not more symmetric we | |
9cfc7bd6 SE |
988 | * won't consider it either |
989 | */ | |
89652331 | 990 | if (router_ifinfo && |
01b97a3e | 991 | neigh_ifinfo->bat_iv.tq_avg == router_ifinfo->bat_iv.tq_avg) { |
dee222c7 SE |
992 | sum_orig = batadv_iv_orig_ifinfo_sum(router->orig_node, |
993 | router->if_incoming); | |
994 | sum_neigh = batadv_iv_orig_ifinfo_sum(neigh_node->orig_node, | |
995 | neigh_node->if_incoming); | |
bbb1f90e | 996 | if (sum_orig >= sum_neigh) |
e1bf0c14 | 997 | goto out; |
fc957275 ML |
998 | } |
999 | ||
7351a482 | 1000 | batadv_update_route(bat_priv, orig_node, if_outgoing, neigh_node); |
fc957275 ML |
1001 | goto out; |
1002 | ||
1003 | unlock: | |
1004 | rcu_read_unlock(); | |
1005 | out: | |
1006 | if (neigh_node) | |
25bb2509 | 1007 | batadv_neigh_node_put(neigh_node); |
fc957275 | 1008 | if (router) |
25bb2509 | 1009 | batadv_neigh_node_put(router); |
89652331 | 1010 | if (neigh_ifinfo) |
044fa3ae | 1011 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 | 1012 | if (router_ifinfo) |
044fa3ae | 1013 | batadv_neigh_ifinfo_put(router_ifinfo); |
fc957275 ML |
1014 | } |
1015 | ||
89652331 | 1016 | /** |
7e9a8c2c | 1017 | * batadv_iv_ogm_calc_tq() - calculate tq for current received ogm packet |
89652331 SW |
1018 | * @orig_node: the orig node who originally emitted the ogm packet |
1019 | * @orig_neigh_node: the orig node struct of the neighbor who sent the packet | |
1020 | * @batadv_ogm_packet: the ogm packet | |
1021 | * @if_incoming: interface where the packet was received | |
1022 | * @if_outgoing: interface for which the retransmission should be considered | |
1023 | * | |
4b426b10 | 1024 | * Return: true if the link can be considered bidirectional, false otherwise |
89652331 | 1025 | */ |
4b426b10 SE |
1026 | static bool batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, |
1027 | struct batadv_orig_node *orig_neigh_node, | |
1028 | struct batadv_ogm_packet *batadv_ogm_packet, | |
1029 | struct batadv_hard_iface *if_incoming, | |
1030 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1031 | { |
56303d34 SE |
1032 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1033 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node; | |
89652331 | 1034 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
6b5e971a SE |
1035 | u8 total_count; |
1036 | u8 orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own; | |
42d0b044 | 1037 | unsigned int neigh_rq_inv_cube, neigh_rq_max_cube; |
d285f52c | 1038 | unsigned int tq_asym_penalty, inv_asym_penalty; |
42d0b044 | 1039 | unsigned int combined_tq; |
d285f52c | 1040 | unsigned int tq_iface_penalty; |
4b426b10 | 1041 | bool ret = false; |
fc957275 ML |
1042 | |
1043 | /* find corresponding one hop neighbor */ | |
1044 | rcu_read_lock(); | |
b67bfe0d | 1045 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 1046 | &orig_neigh_node->neigh_list, list) { |
1eda58bf SE |
1047 | if (!batadv_compare_eth(tmp_neigh_node->addr, |
1048 | orig_neigh_node->orig)) | |
fc957275 ML |
1049 | continue; |
1050 | ||
1051 | if (tmp_neigh_node->if_incoming != if_incoming) | |
1052 | continue; | |
1053 | ||
77ae32e8 | 1054 | if (!kref_get_unless_zero(&tmp_neigh_node->refcount)) |
fc957275 ML |
1055 | continue; |
1056 | ||
1057 | neigh_node = tmp_neigh_node; | |
1058 | break; | |
1059 | } | |
1060 | rcu_read_unlock(); | |
1061 | ||
1062 | if (!neigh_node) | |
fe8bc396 SE |
1063 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
1064 | orig_neigh_node->orig, | |
1065 | orig_neigh_node, | |
863dd7a8 | 1066 | orig_neigh_node); |
fc957275 ML |
1067 | |
1068 | if (!neigh_node) | |
1069 | goto out; | |
1070 | ||
d7b2a97e | 1071 | /* if orig_node is direct neighbor update neigh_node last_seen */ |
fc957275 | 1072 | if (orig_node == orig_neigh_node) |
d7b2a97e | 1073 | neigh_node->last_seen = jiffies; |
fc957275 | 1074 | |
d7b2a97e | 1075 | orig_node->last_seen = jiffies; |
fc957275 ML |
1076 | |
1077 | /* find packet count of corresponding one hop neighbor */ | |
dee222c7 | 1078 | orig_eq_count = batadv_iv_orig_ifinfo_sum(orig_neigh_node, if_incoming); |
89652331 SW |
1079 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
1080 | if (neigh_ifinfo) { | |
1081 | neigh_rq_count = neigh_ifinfo->bat_iv.real_packet_count; | |
044fa3ae | 1082 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 SW |
1083 | } else { |
1084 | neigh_rq_count = 0; | |
1085 | } | |
fc957275 ML |
1086 | |
1087 | /* pay attention to not get a value bigger than 100 % */ | |
c67893d1 SE |
1088 | if (orig_eq_count > neigh_rq_count) |
1089 | total_count = neigh_rq_count; | |
1090 | else | |
1091 | total_count = orig_eq_count; | |
fc957275 | 1092 | |
9cfc7bd6 SE |
1093 | /* if we have too few packets (too less data) we set tq_own to zero |
1094 | * if we receive too few packets it is not considered bidirectional | |
1095 | */ | |
42d0b044 SE |
1096 | if (total_count < BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM || |
1097 | neigh_rq_count < BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM) | |
fc957275 ML |
1098 | tq_own = 0; |
1099 | else | |
1100 | /* neigh_node->real_packet_count is never zero as we | |
1101 | * only purge old information when getting new | |
9cfc7bd6 SE |
1102 | * information |
1103 | */ | |
42d0b044 | 1104 | tq_own = (BATADV_TQ_MAX_VALUE * total_count) / neigh_rq_count; |
fc957275 | 1105 | |
21a1236b | 1106 | /* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does |
fc957275 ML |
1107 | * affect the nearly-symmetric links only a little, but |
1108 | * punishes asymmetric links more. This will give a value | |
1109 | * between 0 and TQ_MAX_VALUE | |
1110 | */ | |
42d0b044 SE |
1111 | neigh_rq_inv = BATADV_TQ_LOCAL_WINDOW_SIZE - neigh_rq_count; |
1112 | neigh_rq_inv_cube = neigh_rq_inv * neigh_rq_inv * neigh_rq_inv; | |
1113 | neigh_rq_max_cube = BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1114 | BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1115 | BATADV_TQ_LOCAL_WINDOW_SIZE; | |
1116 | inv_asym_penalty = BATADV_TQ_MAX_VALUE * neigh_rq_inv_cube; | |
1117 | inv_asym_penalty /= neigh_rq_max_cube; | |
1118 | tq_asym_penalty = BATADV_TQ_MAX_VALUE - inv_asym_penalty; | |
1119 | ||
c0398768 SW |
1120 | /* penalize if the OGM is forwarded on the same interface. WiFi |
1121 | * interfaces and other half duplex devices suffer from throughput | |
1122 | * drops as they can't send and receive at the same time. | |
1123 | */ | |
1124 | tq_iface_penalty = BATADV_TQ_MAX_VALUE; | |
825ffe1f | 1125 | if (if_outgoing && if_incoming == if_outgoing && |
10b1bbb4 | 1126 | batadv_is_wifi_hardif(if_outgoing)) |
c0398768 SW |
1127 | tq_iface_penalty = batadv_hop_penalty(BATADV_TQ_MAX_VALUE, |
1128 | bat_priv); | |
1129 | ||
1130 | combined_tq = batadv_ogm_packet->tq * | |
1131 | tq_own * | |
1132 | tq_asym_penalty * | |
1133 | tq_iface_penalty; | |
1134 | combined_tq /= BATADV_TQ_MAX_VALUE * | |
1135 | BATADV_TQ_MAX_VALUE * | |
1136 | BATADV_TQ_MAX_VALUE; | |
96412690 | 1137 | batadv_ogm_packet->tq = combined_tq; |
fc957275 | 1138 | |
39c75a51 | 1139 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
6a04be8d | 1140 | "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 | 1141 | orig_node->orig, orig_neigh_node->orig, total_count, |
c0398768 SW |
1142 | neigh_rq_count, tq_own, tq_asym_penalty, tq_iface_penalty, |
1143 | batadv_ogm_packet->tq, if_incoming->net_dev->name, | |
1144 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT"); | |
fc957275 ML |
1145 | |
1146 | /* if link has the minimum required transmission quality | |
9cfc7bd6 SE |
1147 | * consider it bidirectional |
1148 | */ | |
96412690 | 1149 | if (batadv_ogm_packet->tq >= BATADV_TQ_TOTAL_BIDRECT_LIMIT) |
4b426b10 | 1150 | ret = true; |
fc957275 ML |
1151 | |
1152 | out: | |
1153 | if (neigh_node) | |
25bb2509 | 1154 | batadv_neigh_node_put(neigh_node); |
fc957275 ML |
1155 | return ret; |
1156 | } | |
1157 | ||
7c24bbbe | 1158 | /** |
7e9a8c2c | 1159 | * batadv_iv_ogm_update_seqnos() - process a batman packet for all interfaces, |
7c24bbbe SW |
1160 | * adjust the sequence number and find out whether it is a duplicate |
1161 | * @ethhdr: ethernet header of the packet | |
1162 | * @batadv_ogm_packet: OGM packet to be considered | |
1163 | * @if_incoming: interface on which the OGM packet was received | |
89652331 | 1164 | * @if_outgoing: interface for which the retransmission should be considered |
7c24bbbe | 1165 | * |
62fe710f | 1166 | * Return: duplicate status as enum batadv_dup_status |
fc957275 | 1167 | */ |
7c24bbbe | 1168 | static enum batadv_dup_status |
fe8bc396 | 1169 | batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, |
96412690 | 1170 | const struct batadv_ogm_packet *batadv_ogm_packet, |
89652331 SW |
1171 | const struct batadv_hard_iface *if_incoming, |
1172 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1173 | { |
56303d34 SE |
1174 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1175 | struct batadv_orig_node *orig_node; | |
7351a482 | 1176 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; |
89652331 SW |
1177 | struct batadv_neigh_node *neigh_node; |
1178 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
4b426b10 | 1179 | bool is_dup; |
6b5e971a | 1180 | s32 seq_diff; |
4b426b10 | 1181 | bool need_update = false; |
7c24bbbe SW |
1182 | int set_mark; |
1183 | enum batadv_dup_status ret = BATADV_NO_DUP; | |
6b5e971a SE |
1184 | u32 seqno = ntohl(batadv_ogm_packet->seqno); |
1185 | u8 *neigh_addr; | |
1186 | u8 packet_count; | |
0538f759 | 1187 | unsigned long *bitmap; |
fc957275 | 1188 | |
bbad0a5e | 1189 | orig_node = batadv_iv_ogm_orig_get(bat_priv, batadv_ogm_packet->orig); |
fc957275 | 1190 | if (!orig_node) |
7c24bbbe | 1191 | return BATADV_NO_DUP; |
fc957275 | 1192 | |
7351a482 SW |
1193 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1194 | if (WARN_ON(!orig_ifinfo)) { | |
5d967310 | 1195 | batadv_orig_node_put(orig_node); |
7351a482 SW |
1196 | return 0; |
1197 | } | |
1198 | ||
bbad0a5e | 1199 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
7351a482 | 1200 | seq_diff = seqno - orig_ifinfo->last_real_seqno; |
fc957275 ML |
1201 | |
1202 | /* signalize caller that the packet is to be dropped. */ | |
1e5cc266 | 1203 | if (!hlist_empty(&orig_node->neigh_list) && |
30d3c511 | 1204 | batadv_window_protected(bat_priv, seq_diff, |
81f02683 SW |
1205 | BATADV_TQ_LOCAL_WINDOW_SIZE, |
1206 | &orig_ifinfo->batman_seqno_reset, NULL)) { | |
7c24bbbe | 1207 | ret = BATADV_PROTECTED; |
fc957275 | 1208 | goto out; |
7c24bbbe | 1209 | } |
fc957275 ML |
1210 | |
1211 | rcu_read_lock(); | |
89652331 SW |
1212 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { |
1213 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, | |
1214 | if_outgoing); | |
1215 | if (!neigh_ifinfo) | |
1216 | continue; | |
1217 | ||
1218 | neigh_addr = neigh_node->addr; | |
1219 | is_dup = batadv_test_bit(neigh_ifinfo->bat_iv.real_bits, | |
7351a482 | 1220 | orig_ifinfo->last_real_seqno, |
7c24bbbe SW |
1221 | seqno); |
1222 | ||
1eda58bf | 1223 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && |
89652331 | 1224 | neigh_node->if_incoming == if_incoming) { |
fc957275 | 1225 | set_mark = 1; |
7c24bbbe SW |
1226 | if (is_dup) |
1227 | ret = BATADV_NEIGH_DUP; | |
1228 | } else { | |
fc957275 | 1229 | set_mark = 0; |
825ffe1f | 1230 | if (is_dup && ret != BATADV_NEIGH_DUP) |
7c24bbbe SW |
1231 | ret = BATADV_ORIG_DUP; |
1232 | } | |
fc957275 ML |
1233 | |
1234 | /* if the window moved, set the update flag. */ | |
89652331 | 1235 | bitmap = neigh_ifinfo->bat_iv.real_bits; |
0538f759 | 1236 | need_update |= batadv_bit_get_packet(bat_priv, bitmap, |
0f5f9322 | 1237 | seq_diff, set_mark); |
fc957275 | 1238 | |
89652331 | 1239 | packet_count = bitmap_weight(bitmap, |
bbb1f90e | 1240 | BATADV_TQ_LOCAL_WINDOW_SIZE); |
89652331 | 1241 | neigh_ifinfo->bat_iv.real_packet_count = packet_count; |
044fa3ae | 1242 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
fc957275 ML |
1243 | } |
1244 | rcu_read_unlock(); | |
1245 | ||
1246 | if (need_update) { | |
39c75a51 | 1247 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
7351a482 SW |
1248 | "%s updating last_seqno: old %u, new %u\n", |
1249 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT", | |
1250 | orig_ifinfo->last_real_seqno, seqno); | |
1251 | orig_ifinfo->last_real_seqno = seqno; | |
fc957275 ML |
1252 | } |
1253 | ||
fc957275 | 1254 | out: |
bbad0a5e | 1255 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
5d967310 | 1256 | batadv_orig_node_put(orig_node); |
35f94779 | 1257 | batadv_orig_ifinfo_put(orig_ifinfo); |
fc957275 ML |
1258 | return ret; |
1259 | } | |
1260 | ||
7351a482 | 1261 | /** |
7e9a8c2c SE |
1262 | * batadv_iv_ogm_process_per_outif() - process a batman iv OGM for an outgoing |
1263 | * interface | |
7351a482 | 1264 | * @skb: the skb containing the OGM |
95298a91 | 1265 | * @ogm_offset: offset from skb->data to start of ogm header |
7351a482 SW |
1266 | * @orig_node: the (cached) orig node for the originator of this OGM |
1267 | * @if_incoming: the interface where this packet was received | |
1268 | * @if_outgoing: the interface for which the packet should be considered | |
1269 | */ | |
1270 | static void | |
1271 | batadv_iv_ogm_process_per_outif(const struct sk_buff *skb, int ogm_offset, | |
1272 | struct batadv_orig_node *orig_node, | |
1273 | struct batadv_hard_iface *if_incoming, | |
1274 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1275 | { |
56303d34 | 1276 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
4ff1e2a7 | 1277 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
4f248cff SE |
1278 | struct batadv_neigh_node *router = NULL; |
1279 | struct batadv_neigh_node *router_router = NULL; | |
7351a482 SW |
1280 | struct batadv_orig_node *orig_neigh_node; |
1281 | struct batadv_orig_ifinfo *orig_ifinfo; | |
56303d34 | 1282 | struct batadv_neigh_node *orig_neigh_router = NULL; |
89652331 | 1283 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; |
7351a482 | 1284 | struct batadv_ogm_packet *ogm_packet; |
7c24bbbe | 1285 | enum batadv_dup_status dup_status; |
7351a482 SW |
1286 | bool is_from_best_next_hop = false; |
1287 | bool is_single_hop_neigh = false; | |
1288 | bool sameseq, similar_ttl; | |
1289 | struct sk_buff *skb_priv; | |
1290 | struct ethhdr *ethhdr; | |
6b5e971a | 1291 | u8 *prev_sender; |
4b426b10 | 1292 | bool is_bidirect; |
fc957275 | 1293 | |
7351a482 SW |
1294 | /* create a private copy of the skb, as some functions change tq value |
1295 | * and/or flags. | |
fc957275 | 1296 | */ |
7351a482 SW |
1297 | skb_priv = skb_copy(skb, GFP_ATOMIC); |
1298 | if (!skb_priv) | |
fc957275 ML |
1299 | return; |
1300 | ||
7351a482 SW |
1301 | ethhdr = eth_hdr(skb_priv); |
1302 | ogm_packet = (struct batadv_ogm_packet *)(skb_priv->data + ogm_offset); | |
fc957275 | 1303 | |
7351a482 SW |
1304 | dup_status = batadv_iv_ogm_update_seqnos(ethhdr, ogm_packet, |
1305 | if_incoming, if_outgoing); | |
1306 | if (batadv_compare_eth(ethhdr->h_source, ogm_packet->orig)) | |
75cd33f8 | 1307 | is_single_hop_neigh = true; |
fc957275 | 1308 | |
7c24bbbe | 1309 | if (dup_status == BATADV_PROTECTED) { |
39c75a51 | 1310 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1311 | "Drop packet: packet within seqno protection time (sender: %pM)\n", |
1312 | ethhdr->h_source); | |
fc957275 ML |
1313 | goto out; |
1314 | } | |
1315 | ||
7351a482 | 1316 | if (ogm_packet->tq == 0) { |
39c75a51 | 1317 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1318 | "Drop packet: originator packet with tq equal 0\n"); |
fc957275 ML |
1319 | goto out; |
1320 | } | |
1321 | ||
4ff1e2a7 ML |
1322 | if (is_single_hop_neigh) { |
1323 | hardif_neigh = batadv_hardif_neigh_get(if_incoming, | |
1324 | ethhdr->h_source); | |
1325 | if (hardif_neigh) | |
1326 | hardif_neigh->last_seen = jiffies; | |
1327 | } | |
1328 | ||
7351a482 | 1329 | router = batadv_orig_router_get(orig_node, if_outgoing); |
0538f759 | 1330 | if (router) { |
7351a482 SW |
1331 | router_router = batadv_orig_router_get(router->orig_node, |
1332 | if_outgoing); | |
1333 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
0538f759 | 1334 | } |
fc957275 | 1335 | |
7351a482 | 1336 | if ((router_ifinfo && router_ifinfo->bat_iv.tq_avg != 0) && |
1eda58bf | 1337 | (batadv_compare_eth(router->addr, ethhdr->h_source))) |
13b2541b ML |
1338 | is_from_best_next_hop = true; |
1339 | ||
7351a482 | 1340 | prev_sender = ogm_packet->prev_sender; |
fc957275 ML |
1341 | /* avoid temporary routing loops */ |
1342 | if (router && router_router && | |
1eda58bf | 1343 | (batadv_compare_eth(router->addr, prev_sender)) && |
7351a482 | 1344 | !(batadv_compare_eth(ogm_packet->orig, prev_sender)) && |
1eda58bf | 1345 | (batadv_compare_eth(router->addr, router_router->addr))) { |
39c75a51 | 1346 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1347 | "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n", |
1348 | ethhdr->h_source); | |
fc957275 ML |
1349 | goto out; |
1350 | } | |
1351 | ||
7351a482 SW |
1352 | if (if_outgoing == BATADV_IF_DEFAULT) |
1353 | batadv_tvlv_ogm_receive(bat_priv, ogm_packet, orig_node); | |
ef261577 | 1354 | |
fc957275 | 1355 | /* if sender is a direct neighbor the sender mac equals |
9cfc7bd6 SE |
1356 | * originator mac |
1357 | */ | |
c67893d1 SE |
1358 | if (is_single_hop_neigh) |
1359 | orig_neigh_node = orig_node; | |
1360 | else | |
bbad0a5e AQ |
1361 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, |
1362 | ethhdr->h_source); | |
c67893d1 | 1363 | |
fc957275 ML |
1364 | if (!orig_neigh_node) |
1365 | goto out; | |
1366 | ||
d56b1705 MH |
1367 | /* Update nc_nodes of the originator */ |
1368 | batadv_nc_update_nc_node(bat_priv, orig_node, orig_neigh_node, | |
7351a482 | 1369 | ogm_packet, is_single_hop_neigh); |
d56b1705 | 1370 | |
7351a482 SW |
1371 | orig_neigh_router = batadv_orig_router_get(orig_neigh_node, |
1372 | if_outgoing); | |
fc957275 ML |
1373 | |
1374 | /* drop packet if sender is not a direct neighbor and if we | |
9cfc7bd6 SE |
1375 | * don't route towards it |
1376 | */ | |
825ffe1f | 1377 | if (!is_single_hop_neigh && !orig_neigh_router) { |
39c75a51 | 1378 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1379 | "Drop packet: OGM via unknown neighbor!\n"); |
fc957275 ML |
1380 | goto out_neigh; |
1381 | } | |
1382 | ||
fe8bc396 | 1383 | is_bidirect = batadv_iv_ogm_calc_tq(orig_node, orig_neigh_node, |
7351a482 SW |
1384 | ogm_packet, if_incoming, |
1385 | if_outgoing); | |
fc957275 | 1386 | |
fc957275 | 1387 | /* update ranking if it is not a duplicate or has the same |
9cfc7bd6 SE |
1388 | * seqno and similar ttl as the non-duplicate |
1389 | */ | |
7351a482 SW |
1390 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1391 | if (!orig_ifinfo) | |
1392 | goto out_neigh; | |
1393 | ||
1394 | sameseq = orig_ifinfo->last_real_seqno == ntohl(ogm_packet->seqno); | |
1395 | similar_ttl = (orig_ifinfo->last_ttl - 3) <= ogm_packet->ttl; | |
1396 | ||
825ffe1f | 1397 | if (is_bidirect && (dup_status == BATADV_NO_DUP || |
7351a482 SW |
1398 | (sameseq && similar_ttl))) { |
1399 | batadv_iv_ogm_orig_update(bat_priv, orig_node, | |
1400 | orig_ifinfo, ethhdr, | |
1401 | ogm_packet, if_incoming, | |
1402 | if_outgoing, dup_status); | |
1403 | } | |
35f94779 | 1404 | batadv_orig_ifinfo_put(orig_ifinfo); |
fc957275 | 1405 | |
ef0a937f SW |
1406 | /* only forward for specific interface, not for the default one. */ |
1407 | if (if_outgoing == BATADV_IF_DEFAULT) | |
1408 | goto out_neigh; | |
1409 | ||
fc957275 ML |
1410 | /* is single hop (direct) neighbor */ |
1411 | if (is_single_hop_neigh) { | |
7351a482 SW |
1412 | /* OGMs from secondary interfaces should only scheduled once |
1413 | * per interface where it has been received, not multiple times | |
1414 | */ | |
825ffe1f SE |
1415 | if (ogm_packet->ttl <= 2 && |
1416 | if_incoming != if_outgoing) { | |
7351a482 SW |
1417 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1418 | "Drop packet: OGM from secondary interface and wrong outgoing interface\n"); | |
1419 | goto out_neigh; | |
1420 | } | |
fc957275 | 1421 | /* mark direct link on incoming interface */ |
7351a482 | 1422 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1423 | is_single_hop_neigh, |
ef0a937f SW |
1424 | is_from_best_next_hop, if_incoming, |
1425 | if_outgoing); | |
fc957275 | 1426 | |
39c75a51 | 1427 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1428 | "Forwarding packet: rebroadcast neighbor packet with direct link flag\n"); |
fc957275 ML |
1429 | goto out_neigh; |
1430 | } | |
1431 | ||
1432 | /* multihop originator */ | |
fe8bc396 | 1433 | if (!is_bidirect) { |
39c75a51 | 1434 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1435 | "Drop packet: not received via bidirectional link\n"); |
fc957275 ML |
1436 | goto out_neigh; |
1437 | } | |
1438 | ||
7c24bbbe | 1439 | if (dup_status == BATADV_NEIGH_DUP) { |
39c75a51 | 1440 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1441 | "Drop packet: duplicate packet received\n"); |
fc957275 ML |
1442 | goto out_neigh; |
1443 | } | |
1444 | ||
39c75a51 | 1445 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1446 | "Forwarding packet: rebroadcast originator packet\n"); |
7351a482 | 1447 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1448 | is_single_hop_neigh, is_from_best_next_hop, |
ef0a937f | 1449 | if_incoming, if_outgoing); |
fc957275 ML |
1450 | |
1451 | out_neigh: | |
825ffe1f | 1452 | if (orig_neigh_node && !is_single_hop_neigh) |
5d967310 | 1453 | batadv_orig_node_put(orig_neigh_node); |
fc957275 | 1454 | out: |
c1e517fb | 1455 | if (router_ifinfo) |
044fa3ae | 1456 | batadv_neigh_ifinfo_put(router_ifinfo); |
fc957275 | 1457 | if (router) |
25bb2509 | 1458 | batadv_neigh_node_put(router); |
fc957275 | 1459 | if (router_router) |
25bb2509 | 1460 | batadv_neigh_node_put(router_router); |
fc957275 | 1461 | if (orig_neigh_router) |
25bb2509 | 1462 | batadv_neigh_node_put(orig_neigh_router); |
4ff1e2a7 | 1463 | if (hardif_neigh) |
accadc35 | 1464 | batadv_hardif_neigh_put(hardif_neigh); |
fc957275 | 1465 | |
bd687fe4 | 1466 | consume_skb(skb_priv); |
7351a482 SW |
1467 | } |
1468 | ||
dee222c7 SE |
1469 | /** |
1470 | * batadv_iv_ogm_process_reply() - Check OGM for direct reply and process it | |
1471 | * @ogm_packet: rebroadcast OGM packet to process | |
1472 | * @if_incoming: the interface where this packet was received | |
1473 | * @orig_node: originator which reproadcasted the OGMs | |
1474 | * @if_incoming_seqno: OGM sequence number when rebroadcast was received | |
1475 | */ | |
1476 | static void batadv_iv_ogm_process_reply(struct batadv_ogm_packet *ogm_packet, | |
1477 | struct batadv_hard_iface *if_incoming, | |
1478 | struct batadv_orig_node *orig_node, | |
1479 | u32 if_incoming_seqno) | |
1480 | { | |
1481 | struct batadv_orig_ifinfo *orig_ifinfo; | |
1482 | s32 bit_pos; | |
1483 | u8 *weight; | |
1484 | ||
1485 | /* neighbor has to indicate direct link and it has to | |
1486 | * come via the corresponding interface | |
1487 | */ | |
1488 | if (!(ogm_packet->flags & BATADV_DIRECTLINK)) | |
1489 | return; | |
1490 | ||
1491 | if (!batadv_compare_eth(if_incoming->net_dev->dev_addr, | |
1492 | ogm_packet->orig)) | |
1493 | return; | |
1494 | ||
1495 | orig_ifinfo = batadv_orig_ifinfo_get(orig_node, if_incoming); | |
1496 | if (!orig_ifinfo) | |
1497 | return; | |
1498 | ||
1499 | /* save packet seqno for bidirectional check */ | |
1500 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
1501 | bit_pos = if_incoming_seqno - 2; | |
1502 | bit_pos -= ntohl(ogm_packet->seqno); | |
1503 | batadv_set_bit(orig_ifinfo->bat_iv.bcast_own, bit_pos); | |
1504 | weight = &orig_ifinfo->bat_iv.bcast_own_sum; | |
1505 | *weight = bitmap_weight(orig_ifinfo->bat_iv.bcast_own, | |
1506 | BATADV_TQ_LOCAL_WINDOW_SIZE); | |
1507 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
1508 | ||
1509 | batadv_orig_ifinfo_put(orig_ifinfo); | |
1510 | } | |
1511 | ||
7351a482 | 1512 | /** |
7e9a8c2c | 1513 | * batadv_iv_ogm_process() - process an incoming batman iv OGM |
7351a482 SW |
1514 | * @skb: the skb containing the OGM |
1515 | * @ogm_offset: offset to the OGM which should be processed (for aggregates) | |
1516 | * @if_incoming: the interface where this packet was receved | |
1517 | */ | |
1518 | static void batadv_iv_ogm_process(const struct sk_buff *skb, int ogm_offset, | |
1519 | struct batadv_hard_iface *if_incoming) | |
1520 | { | |
1521 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); | |
1522 | struct batadv_orig_node *orig_neigh_node, *orig_node; | |
1523 | struct batadv_hard_iface *hard_iface; | |
1524 | struct batadv_ogm_packet *ogm_packet; | |
6b5e971a | 1525 | u32 if_incoming_seqno; |
7351a482 SW |
1526 | bool has_directlink_flag; |
1527 | struct ethhdr *ethhdr; | |
1528 | bool is_my_oldorig = false; | |
1529 | bool is_my_addr = false; | |
1530 | bool is_my_orig = false; | |
1531 | ||
1532 | ogm_packet = (struct batadv_ogm_packet *)(skb->data + ogm_offset); | |
1533 | ethhdr = eth_hdr(skb); | |
1534 | ||
1535 | /* Silently drop when the batman packet is actually not a | |
1536 | * correct packet. | |
1537 | * | |
1538 | * This might happen if a packet is padded (e.g. Ethernet has a | |
1539 | * minimum frame length of 64 byte) and the aggregation interprets | |
1540 | * it as an additional length. | |
1541 | * | |
1542 | * TODO: A more sane solution would be to have a bit in the | |
1543 | * batadv_ogm_packet to detect whether the packet is the last | |
1544 | * packet in an aggregation. Here we expect that the padding | |
1545 | * is always zero (or not 0x01) | |
1546 | */ | |
1547 | if (ogm_packet->packet_type != BATADV_IV_OGM) | |
1548 | return; | |
1549 | ||
1550 | /* could be changed by schedule_own_packet() */ | |
1551 | if_incoming_seqno = atomic_read(&if_incoming->bat_iv.ogm_seqno); | |
1552 | ||
1553 | if (ogm_packet->flags & BATADV_DIRECTLINK) | |
1554 | has_directlink_flag = true; | |
1555 | else | |
1556 | has_directlink_flag = false; | |
1557 | ||
1558 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1559 | "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", | |
1560 | ethhdr->h_source, if_incoming->net_dev->name, | |
1561 | if_incoming->net_dev->dev_addr, ogm_packet->orig, | |
1562 | ogm_packet->prev_sender, ntohl(ogm_packet->seqno), | |
1563 | ogm_packet->tq, ogm_packet->ttl, | |
1564 | ogm_packet->version, has_directlink_flag); | |
1565 | ||
1566 | rcu_read_lock(); | |
1567 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1568 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1569 | continue; | |
1570 | ||
1571 | if (hard_iface->soft_iface != if_incoming->soft_iface) | |
1572 | continue; | |
1573 | ||
1574 | if (batadv_compare_eth(ethhdr->h_source, | |
1575 | hard_iface->net_dev->dev_addr)) | |
1576 | is_my_addr = true; | |
1577 | ||
1578 | if (batadv_compare_eth(ogm_packet->orig, | |
1579 | hard_iface->net_dev->dev_addr)) | |
1580 | is_my_orig = true; | |
1581 | ||
1582 | if (batadv_compare_eth(ogm_packet->prev_sender, | |
1583 | hard_iface->net_dev->dev_addr)) | |
1584 | is_my_oldorig = true; | |
1585 | } | |
1586 | rcu_read_unlock(); | |
1587 | ||
1588 | if (is_my_addr) { | |
1589 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1590 | "Drop packet: received my own broadcast (sender: %pM)\n", | |
1591 | ethhdr->h_source); | |
1592 | return; | |
1593 | } | |
1594 | ||
1595 | if (is_my_orig) { | |
7351a482 SW |
1596 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, |
1597 | ethhdr->h_source); | |
1598 | if (!orig_neigh_node) | |
1599 | return; | |
1600 | ||
dee222c7 SE |
1601 | batadv_iv_ogm_process_reply(ogm_packet, if_incoming, |
1602 | orig_neigh_node, if_incoming_seqno); | |
7351a482 SW |
1603 | |
1604 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1605 | "Drop packet: originator packet from myself (via neighbor)\n"); | |
5d967310 | 1606 | batadv_orig_node_put(orig_neigh_node); |
7351a482 SW |
1607 | return; |
1608 | } | |
1609 | ||
1610 | if (is_my_oldorig) { | |
1611 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1612 | "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n", | |
1613 | ethhdr->h_source); | |
1614 | return; | |
1615 | } | |
1616 | ||
1617 | if (ogm_packet->flags & BATADV_NOT_BEST_NEXT_HOP) { | |
1618 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1619 | "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n", | |
1620 | ethhdr->h_source); | |
1621 | return; | |
1622 | } | |
1623 | ||
1624 | orig_node = batadv_iv_ogm_orig_get(bat_priv, ogm_packet->orig); | |
1625 | if (!orig_node) | |
1626 | return; | |
1627 | ||
1628 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, | |
1629 | if_incoming, BATADV_IF_DEFAULT); | |
1630 | ||
1631 | rcu_read_lock(); | |
1632 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1633 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1634 | continue; | |
1635 | ||
1636 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
1637 | continue; | |
1638 | ||
27353446 SE |
1639 | if (!kref_get_unless_zero(&hard_iface->refcount)) |
1640 | continue; | |
1641 | ||
7351a482 SW |
1642 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, |
1643 | if_incoming, hard_iface); | |
27353446 SE |
1644 | |
1645 | batadv_hardif_put(hard_iface); | |
7351a482 SW |
1646 | } |
1647 | rcu_read_unlock(); | |
1648 | ||
5d967310 | 1649 | batadv_orig_node_put(orig_node); |
fc957275 ML |
1650 | } |
1651 | ||
f0d97253 AQ |
1652 | static void batadv_iv_send_outstanding_bat_ogm_packet(struct work_struct *work) |
1653 | { | |
1654 | struct delayed_work *delayed_work; | |
1655 | struct batadv_forw_packet *forw_packet; | |
1656 | struct batadv_priv *bat_priv; | |
bd687fe4 | 1657 | bool dropped = false; |
f0d97253 AQ |
1658 | |
1659 | delayed_work = to_delayed_work(work); | |
1660 | forw_packet = container_of(delayed_work, struct batadv_forw_packet, | |
1661 | delayed_work); | |
1662 | bat_priv = netdev_priv(forw_packet->if_incoming->soft_iface); | |
f0d97253 | 1663 | |
bd687fe4 SE |
1664 | if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) { |
1665 | dropped = true; | |
f0d97253 | 1666 | goto out; |
bd687fe4 | 1667 | } |
f0d97253 AQ |
1668 | |
1669 | batadv_iv_ogm_emit(forw_packet); | |
1670 | ||
1671 | /* we have to have at least one packet in the queue to determine the | |
1672 | * queues wake up time unless we are shutting down. | |
1673 | * | |
1674 | * only re-schedule if this is the "original" copy, e.g. the OGM of the | |
1675 | * primary interface should only be rescheduled once per period, but | |
1676 | * this function will be called for the forw_packet instances of the | |
1677 | * other secondary interfaces as well. | |
1678 | */ | |
1679 | if (forw_packet->own && | |
1680 | forw_packet->if_incoming == forw_packet->if_outgoing) | |
1681 | batadv_iv_ogm_schedule(forw_packet->if_incoming); | |
1682 | ||
1683 | out: | |
9b4aec64 LL |
1684 | /* do we get something for free()? */ |
1685 | if (batadv_forw_packet_steal(forw_packet, | |
1686 | &bat_priv->forw_bat_list_lock)) | |
1687 | batadv_forw_packet_free(forw_packet, dropped); | |
f0d97253 AQ |
1688 | } |
1689 | ||
fe8bc396 | 1690 | static int batadv_iv_ogm_receive(struct sk_buff *skb, |
56303d34 | 1691 | struct batadv_hard_iface *if_incoming) |
fc957275 | 1692 | { |
56303d34 | 1693 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
7351a482 | 1694 | struct batadv_ogm_packet *ogm_packet; |
6b5e971a | 1695 | u8 *packet_pos; |
7351a482 | 1696 | int ogm_offset; |
b91a2543 SE |
1697 | bool res; |
1698 | int ret = NET_RX_DROP; | |
c3e29312 | 1699 | |
b91a2543 SE |
1700 | res = batadv_check_management_packet(skb, if_incoming, BATADV_OGM_HLEN); |
1701 | if (!res) | |
1702 | goto free_skb; | |
fc957275 | 1703 | |
edbf12ba ML |
1704 | /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface |
1705 | * that does not have B.A.T.M.A.N. IV enabled ? | |
1706 | */ | |
29824a55 | 1707 | if (bat_priv->algo_ops->iface.enable != batadv_iv_ogm_iface_enable) |
b91a2543 | 1708 | goto free_skb; |
edbf12ba | 1709 | |
d69909d2 SE |
1710 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_RX); |
1711 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES, | |
f8214865 MH |
1712 | skb->len + ETH_HLEN); |
1713 | ||
7351a482 SW |
1714 | ogm_offset = 0; |
1715 | ogm_packet = (struct batadv_ogm_packet *)skb->data; | |
fc957275 ML |
1716 | |
1717 | /* unpack the aggregated packets and process them one by one */ | |
7351a482 SW |
1718 | while (batadv_iv_ogm_aggr_packet(ogm_offset, skb_headlen(skb), |
1719 | ogm_packet->tvlv_len)) { | |
1720 | batadv_iv_ogm_process(skb, ogm_offset, if_incoming); | |
fc957275 | 1721 | |
7351a482 SW |
1722 | ogm_offset += BATADV_OGM_HLEN; |
1723 | ogm_offset += ntohs(ogm_packet->tvlv_len); | |
fc957275 | 1724 | |
7351a482 SW |
1725 | packet_pos = skb->data + ogm_offset; |
1726 | ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b47506d9 | 1727 | } |
c3e29312 | 1728 | |
b91a2543 SE |
1729 | ret = NET_RX_SUCCESS; |
1730 | ||
1731 | free_skb: | |
1732 | if (ret == NET_RX_SUCCESS) | |
1733 | consume_skb(skb); | |
1734 | else | |
1735 | kfree_skb(skb); | |
1736 | ||
1737 | return ret; | |
fc957275 | 1738 | } |
1c280471 | 1739 | |
dc1cbd14 | 1740 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
1b371d13 | 1741 | /** |
7e9a8c2c | 1742 | * batadv_iv_ogm_orig_print_neigh() - print neighbors for the originator table |
89652331 SW |
1743 | * @orig_node: the orig_node for which the neighbors are printed |
1744 | * @if_outgoing: outgoing interface for these entries | |
1745 | * @seq: debugfs table seq_file struct | |
1746 | * | |
1747 | * Must be called while holding an rcu lock. | |
1748 | */ | |
1749 | static void | |
1750 | batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node *orig_node, | |
1751 | struct batadv_hard_iface *if_outgoing, | |
1752 | struct seq_file *seq) | |
1753 | { | |
1754 | struct batadv_neigh_node *neigh_node; | |
1755 | struct batadv_neigh_ifinfo *n_ifinfo; | |
1756 | ||
1757 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { | |
1758 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); | |
1759 | if (!n_ifinfo) | |
1760 | continue; | |
1761 | ||
1762 | seq_printf(seq, " %pM (%3i)", | |
1763 | neigh_node->addr, | |
1764 | n_ifinfo->bat_iv.tq_avg); | |
1765 | ||
044fa3ae | 1766 | batadv_neigh_ifinfo_put(n_ifinfo); |
89652331 SW |
1767 | } |
1768 | } | |
1769 | ||
737a2a22 | 1770 | /** |
7e9a8c2c | 1771 | * batadv_iv_ogm_orig_print() - print the originator table |
737a2a22 AQ |
1772 | * @bat_priv: the bat priv with all the soft interface information |
1773 | * @seq: debugfs table seq_file struct | |
cb1c92ec | 1774 | * @if_outgoing: the outgoing interface for which this should be printed |
737a2a22 AQ |
1775 | */ |
1776 | static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv, | |
cb1c92ec SW |
1777 | struct seq_file *seq, |
1778 | struct batadv_hard_iface *if_outgoing) | |
737a2a22 | 1779 | { |
89652331 | 1780 | struct batadv_neigh_node *neigh_node; |
737a2a22 AQ |
1781 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
1782 | int last_seen_msecs, last_seen_secs; | |
1783 | struct batadv_orig_node *orig_node; | |
89652331 | 1784 | struct batadv_neigh_ifinfo *n_ifinfo; |
737a2a22 AQ |
1785 | unsigned long last_seen_jiffies; |
1786 | struct hlist_head *head; | |
1787 | int batman_count = 0; | |
6b5e971a | 1788 | u32 i; |
737a2a22 | 1789 | |
925a6f37 AQ |
1790 | seq_puts(seq, |
1791 | " Originator last-seen (#/255) Nexthop [outgoingIF]: Potential nexthops ...\n"); | |
737a2a22 AQ |
1792 | |
1793 | for (i = 0; i < hash->size; i++) { | |
1794 | head = &hash->table[i]; | |
1795 | ||
1796 | rcu_read_lock(); | |
1797 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
7351a482 | 1798 | neigh_node = batadv_orig_router_get(orig_node, |
cb1c92ec | 1799 | if_outgoing); |
737a2a22 AQ |
1800 | if (!neigh_node) |
1801 | continue; | |
1802 | ||
89652331 | 1803 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, |
cb1c92ec | 1804 | if_outgoing); |
89652331 SW |
1805 | if (!n_ifinfo) |
1806 | goto next; | |
1807 | ||
1808 | if (n_ifinfo->bat_iv.tq_avg == 0) | |
737a2a22 AQ |
1809 | goto next; |
1810 | ||
1811 | last_seen_jiffies = jiffies - orig_node->last_seen; | |
1812 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
1813 | last_seen_secs = last_seen_msecs / 1000; | |
1814 | last_seen_msecs = last_seen_msecs % 1000; | |
1815 | ||
1816 | seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:", | |
1817 | orig_node->orig, last_seen_secs, | |
89652331 | 1818 | last_seen_msecs, n_ifinfo->bat_iv.tq_avg, |
737a2a22 AQ |
1819 | neigh_node->addr, |
1820 | neigh_node->if_incoming->net_dev->name); | |
1821 | ||
cb1c92ec SW |
1822 | batadv_iv_ogm_orig_print_neigh(orig_node, if_outgoing, |
1823 | seq); | |
626caae9 | 1824 | seq_putc(seq, '\n'); |
737a2a22 AQ |
1825 | batman_count++; |
1826 | ||
1827 | next: | |
25bb2509 | 1828 | batadv_neigh_node_put(neigh_node); |
89652331 | 1829 | if (n_ifinfo) |
044fa3ae | 1830 | batadv_neigh_ifinfo_put(n_ifinfo); |
737a2a22 AQ |
1831 | } |
1832 | rcu_read_unlock(); | |
1833 | } | |
1834 | ||
1835 | if (batman_count == 0) | |
1836 | seq_puts(seq, "No batman nodes in range ...\n"); | |
1837 | } | |
dc1cbd14 | 1838 | #endif |
737a2a22 | 1839 | |
024f99cb | 1840 | /** |
7e9a8c2c | 1841 | * batadv_iv_ogm_neigh_get_tq_avg() - Get the TQ average for a neighbour on a |
024f99cb MS |
1842 | * given outgoing interface. |
1843 | * @neigh_node: Neighbour of interest | |
1844 | * @if_outgoing: Outgoing interface of interest | |
1845 | * @tq_avg: Pointer of where to store the TQ average | |
1846 | * | |
1847 | * Return: False if no average TQ available, otherwise true. | |
1848 | */ | |
1849 | static bool | |
1850 | batadv_iv_ogm_neigh_get_tq_avg(struct batadv_neigh_node *neigh_node, | |
1851 | struct batadv_hard_iface *if_outgoing, | |
1852 | u8 *tq_avg) | |
1853 | { | |
1854 | struct batadv_neigh_ifinfo *n_ifinfo; | |
1855 | ||
1856 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); | |
1857 | if (!n_ifinfo) | |
1858 | return false; | |
1859 | ||
1860 | *tq_avg = n_ifinfo->bat_iv.tq_avg; | |
1861 | batadv_neigh_ifinfo_put(n_ifinfo); | |
1862 | ||
1863 | return true; | |
1864 | } | |
1865 | ||
1866 | /** | |
7e9a8c2c | 1867 | * batadv_iv_ogm_orig_dump_subentry() - Dump an originator subentry into a |
024f99cb MS |
1868 | * message |
1869 | * @msg: Netlink message to dump into | |
1870 | * @portid: Port making netlink request | |
1871 | * @seq: Sequence number of netlink message | |
1872 | * @bat_priv: The bat priv with all the soft interface information | |
1873 | * @if_outgoing: Limit dump to entries with this outgoing interface | |
1874 | * @orig_node: Originator to dump | |
1875 | * @neigh_node: Single hops neighbour | |
1876 | * @best: Is the best originator | |
1877 | * | |
1878 | * Return: Error code, or 0 on success | |
1879 | */ | |
1880 | static int | |
1881 | batadv_iv_ogm_orig_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq, | |
1882 | struct batadv_priv *bat_priv, | |
1883 | struct batadv_hard_iface *if_outgoing, | |
1884 | struct batadv_orig_node *orig_node, | |
1885 | struct batadv_neigh_node *neigh_node, | |
1886 | bool best) | |
1887 | { | |
1888 | void *hdr; | |
1889 | u8 tq_avg; | |
1890 | unsigned int last_seen_msecs; | |
1891 | ||
1892 | last_seen_msecs = jiffies_to_msecs(jiffies - orig_node->last_seen); | |
1893 | ||
1894 | if (!batadv_iv_ogm_neigh_get_tq_avg(neigh_node, if_outgoing, &tq_avg)) | |
1895 | return 0; | |
1896 | ||
1897 | if (if_outgoing != BATADV_IF_DEFAULT && | |
1898 | if_outgoing != neigh_node->if_incoming) | |
1899 | return 0; | |
1900 | ||
1901 | hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, | |
1902 | NLM_F_MULTI, BATADV_CMD_GET_ORIGINATORS); | |
1903 | if (!hdr) | |
1904 | return -ENOBUFS; | |
1905 | ||
1906 | if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, | |
1907 | orig_node->orig) || | |
1908 | nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN, | |
1909 | neigh_node->addr) || | |
1910 | nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, | |
1911 | neigh_node->if_incoming->net_dev->ifindex) || | |
1912 | nla_put_u8(msg, BATADV_ATTR_TQ, tq_avg) || | |
1913 | nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, | |
1914 | last_seen_msecs)) | |
1915 | goto nla_put_failure; | |
1916 | ||
1917 | if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) | |
1918 | goto nla_put_failure; | |
1919 | ||
1920 | genlmsg_end(msg, hdr); | |
1921 | return 0; | |
1922 | ||
1923 | nla_put_failure: | |
1924 | genlmsg_cancel(msg, hdr); | |
1925 | return -EMSGSIZE; | |
1926 | } | |
1927 | ||
1928 | /** | |
7e9a8c2c | 1929 | * batadv_iv_ogm_orig_dump_entry() - Dump an originator entry into a message |
024f99cb MS |
1930 | * @msg: Netlink message to dump into |
1931 | * @portid: Port making netlink request | |
1932 | * @seq: Sequence number of netlink message | |
1933 | * @bat_priv: The bat priv with all the soft interface information | |
1934 | * @if_outgoing: Limit dump to entries with this outgoing interface | |
1935 | * @orig_node: Originator to dump | |
1936 | * @sub_s: Number of sub entries to skip | |
1937 | * | |
1938 | * This function assumes the caller holds rcu_read_lock(). | |
1939 | * | |
1940 | * Return: Error code, or 0 on success | |
1941 | */ | |
1942 | static int | |
1943 | batadv_iv_ogm_orig_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, | |
1944 | struct batadv_priv *bat_priv, | |
1945 | struct batadv_hard_iface *if_outgoing, | |
1946 | struct batadv_orig_node *orig_node, int *sub_s) | |
1947 | { | |
1948 | struct batadv_neigh_node *neigh_node_best; | |
1949 | struct batadv_neigh_node *neigh_node; | |
1950 | int sub = 0; | |
1951 | bool best; | |
1952 | u8 tq_avg_best; | |
1953 | ||
1954 | neigh_node_best = batadv_orig_router_get(orig_node, if_outgoing); | |
1955 | if (!neigh_node_best) | |
1956 | goto out; | |
1957 | ||
1958 | if (!batadv_iv_ogm_neigh_get_tq_avg(neigh_node_best, if_outgoing, | |
1959 | &tq_avg_best)) | |
1960 | goto out; | |
1961 | ||
1962 | if (tq_avg_best == 0) | |
1963 | goto out; | |
1964 | ||
1965 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { | |
1966 | if (sub++ < *sub_s) | |
1967 | continue; | |
1968 | ||
1969 | best = (neigh_node == neigh_node_best); | |
1970 | ||
1971 | if (batadv_iv_ogm_orig_dump_subentry(msg, portid, seq, | |
1972 | bat_priv, if_outgoing, | |
1973 | orig_node, neigh_node, | |
1974 | best)) { | |
1975 | batadv_neigh_node_put(neigh_node_best); | |
1976 | ||
1977 | *sub_s = sub - 1; | |
1978 | return -EMSGSIZE; | |
1979 | } | |
1980 | } | |
1981 | ||
1982 | out: | |
1983 | if (neigh_node_best) | |
1984 | batadv_neigh_node_put(neigh_node_best); | |
1985 | ||
1986 | *sub_s = 0; | |
1987 | return 0; | |
1988 | } | |
1989 | ||
1990 | /** | |
7e9a8c2c | 1991 | * batadv_iv_ogm_orig_dump_bucket() - Dump an originator bucket into a |
024f99cb MS |
1992 | * message |
1993 | * @msg: Netlink message to dump into | |
1994 | * @portid: Port making netlink request | |
1995 | * @seq: Sequence number of netlink message | |
1996 | * @bat_priv: The bat priv with all the soft interface information | |
1997 | * @if_outgoing: Limit dump to entries with this outgoing interface | |
1998 | * @head: Bucket to be dumped | |
1999 | * @idx_s: Number of entries to be skipped | |
2000 | * @sub: Number of sub entries to be skipped | |
2001 | * | |
2002 | * Return: Error code, or 0 on success | |
2003 | */ | |
2004 | static int | |
2005 | batadv_iv_ogm_orig_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, | |
2006 | struct batadv_priv *bat_priv, | |
2007 | struct batadv_hard_iface *if_outgoing, | |
2008 | struct hlist_head *head, int *idx_s, int *sub) | |
2009 | { | |
2010 | struct batadv_orig_node *orig_node; | |
2011 | int idx = 0; | |
2012 | ||
2013 | rcu_read_lock(); | |
2014 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
2015 | if (idx++ < *idx_s) | |
2016 | continue; | |
2017 | ||
2018 | if (batadv_iv_ogm_orig_dump_entry(msg, portid, seq, bat_priv, | |
2019 | if_outgoing, orig_node, | |
2020 | sub)) { | |
2021 | rcu_read_unlock(); | |
2022 | *idx_s = idx - 1; | |
2023 | return -EMSGSIZE; | |
2024 | } | |
2025 | } | |
2026 | rcu_read_unlock(); | |
2027 | ||
2028 | *idx_s = 0; | |
2029 | *sub = 0; | |
2030 | return 0; | |
2031 | } | |
2032 | ||
2033 | /** | |
7e9a8c2c | 2034 | * batadv_iv_ogm_orig_dump() - Dump the originators into a message |
024f99cb MS |
2035 | * @msg: Netlink message to dump into |
2036 | * @cb: Control block containing additional options | |
2037 | * @bat_priv: The bat priv with all the soft interface information | |
2038 | * @if_outgoing: Limit dump to entries with this outgoing interface | |
2039 | */ | |
2040 | static void | |
2041 | batadv_iv_ogm_orig_dump(struct sk_buff *msg, struct netlink_callback *cb, | |
2042 | struct batadv_priv *bat_priv, | |
2043 | struct batadv_hard_iface *if_outgoing) | |
2044 | { | |
2045 | struct batadv_hashtable *hash = bat_priv->orig_hash; | |
2046 | struct hlist_head *head; | |
2047 | int bucket = cb->args[0]; | |
2048 | int idx = cb->args[1]; | |
2049 | int sub = cb->args[2]; | |
2050 | int portid = NETLINK_CB(cb->skb).portid; | |
2051 | ||
2052 | while (bucket < hash->size) { | |
2053 | head = &hash->table[bucket]; | |
2054 | ||
2055 | if (batadv_iv_ogm_orig_dump_bucket(msg, portid, | |
2056 | cb->nlh->nlmsg_seq, | |
2057 | bat_priv, if_outgoing, head, | |
2058 | &idx, &sub)) | |
2059 | break; | |
2060 | ||
2061 | bucket++; | |
2062 | } | |
2063 | ||
2064 | cb->args[0] = bucket; | |
2065 | cb->args[1] = idx; | |
2066 | cb->args[2] = sub; | |
2067 | } | |
2068 | ||
dc1cbd14 | 2069 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
7587405a | 2070 | /** |
7e9a8c2c | 2071 | * batadv_iv_hardif_neigh_print() - print a single hop neighbour node |
7587405a ML |
2072 | * @seq: neighbour table seq_file struct |
2073 | * @hardif_neigh: hardif neighbour information | |
2074 | */ | |
2075 | static void | |
2076 | batadv_iv_hardif_neigh_print(struct seq_file *seq, | |
2077 | struct batadv_hardif_neigh_node *hardif_neigh) | |
2078 | { | |
2079 | int last_secs, last_msecs; | |
2080 | ||
2081 | last_secs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) / 1000; | |
2082 | last_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) % 1000; | |
2083 | ||
2084 | seq_printf(seq, " %10s %pM %4i.%03is\n", | |
2085 | hardif_neigh->if_incoming->net_dev->name, | |
2086 | hardif_neigh->addr, last_secs, last_msecs); | |
2087 | } | |
2088 | ||
2089 | /** | |
7e9a8c2c | 2090 | * batadv_iv_ogm_neigh_print() - print the single hop neighbour list |
7587405a ML |
2091 | * @bat_priv: the bat priv with all the soft interface information |
2092 | * @seq: neighbour table seq_file struct | |
2093 | */ | |
2094 | static void batadv_iv_neigh_print(struct batadv_priv *bat_priv, | |
2095 | struct seq_file *seq) | |
2096 | { | |
2097 | struct net_device *net_dev = (struct net_device *)seq->private; | |
2098 | struct batadv_hardif_neigh_node *hardif_neigh; | |
2099 | struct batadv_hard_iface *hard_iface; | |
2100 | int batman_count = 0; | |
2101 | ||
925a6f37 | 2102 | seq_puts(seq, " IF Neighbor last-seen\n"); |
7587405a ML |
2103 | |
2104 | rcu_read_lock(); | |
2105 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
2106 | if (hard_iface->soft_iface != net_dev) | |
2107 | continue; | |
2108 | ||
2109 | hlist_for_each_entry_rcu(hardif_neigh, | |
2110 | &hard_iface->neigh_list, list) { | |
2111 | batadv_iv_hardif_neigh_print(seq, hardif_neigh); | |
2112 | batman_count++; | |
2113 | } | |
2114 | } | |
2115 | rcu_read_unlock(); | |
2116 | ||
2117 | if (batman_count == 0) | |
2118 | seq_puts(seq, "No batman nodes in range ...\n"); | |
2119 | } | |
dc1cbd14 | 2120 | #endif |
7587405a | 2121 | |
a3285a8f | 2122 | /** |
7e9a8c2c | 2123 | * batadv_iv_ogm_neigh_diff() - calculate tq difference of two neighbors |
a3285a8f | 2124 | * @neigh1: the first neighbor object of the comparison |
89652331 | 2125 | * @if_outgoing1: outgoing interface for the first neighbor |
a3285a8f | 2126 | * @neigh2: the second neighbor object of the comparison |
89652331 | 2127 | * @if_outgoing2: outgoing interface for the second neighbor |
57b12502 | 2128 | * @diff: pointer to integer receiving the calculated difference |
a3285a8f | 2129 | * |
57b12502 MP |
2130 | * The content of *@diff is only valid when this function returns true. |
2131 | * It is less, equal to or greater than 0 if the metric via neigh1 is lower, | |
2132 | * the same as or higher than the metric via neigh2 | |
2133 | * | |
2134 | * Return: true when the difference could be calculated, false otherwise | |
a3285a8f | 2135 | */ |
57b12502 MP |
2136 | static bool batadv_iv_ogm_neigh_diff(struct batadv_neigh_node *neigh1, |
2137 | struct batadv_hard_iface *if_outgoing1, | |
2138 | struct batadv_neigh_node *neigh2, | |
2139 | struct batadv_hard_iface *if_outgoing2, | |
2140 | int *diff) | |
a3285a8f | 2141 | { |
89652331 | 2142 | struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; |
6b5e971a | 2143 | u8 tq1, tq2; |
57b12502 | 2144 | bool ret = true; |
89652331 SW |
2145 | |
2146 | neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); | |
2147 | neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
a3285a8f | 2148 | |
89652331 | 2149 | if (!neigh1_ifinfo || !neigh2_ifinfo) { |
57b12502 | 2150 | ret = false; |
89652331 SW |
2151 | goto out; |
2152 | } | |
a3285a8f | 2153 | |
89652331 SW |
2154 | tq1 = neigh1_ifinfo->bat_iv.tq_avg; |
2155 | tq2 = neigh2_ifinfo->bat_iv.tq_avg; | |
57b12502 | 2156 | *diff = (int)tq1 - (int)tq2; |
89652331 SW |
2157 | |
2158 | out: | |
2159 | if (neigh1_ifinfo) | |
044fa3ae | 2160 | batadv_neigh_ifinfo_put(neigh1_ifinfo); |
89652331 | 2161 | if (neigh2_ifinfo) |
044fa3ae | 2162 | batadv_neigh_ifinfo_put(neigh2_ifinfo); |
89652331 | 2163 | |
57b12502 MP |
2164 | return ret; |
2165 | } | |
2166 | ||
024f99cb | 2167 | /** |
7e9a8c2c | 2168 | * batadv_iv_ogm_neigh_dump_neigh() - Dump a neighbour into a netlink message |
024f99cb MS |
2169 | * @msg: Netlink message to dump into |
2170 | * @portid: Port making netlink request | |
2171 | * @seq: Sequence number of netlink message | |
2172 | * @hardif_neigh: Neighbour to be dumped | |
2173 | * | |
2174 | * Return: Error code, or 0 on success | |
2175 | */ | |
2176 | static int | |
2177 | batadv_iv_ogm_neigh_dump_neigh(struct sk_buff *msg, u32 portid, u32 seq, | |
2178 | struct batadv_hardif_neigh_node *hardif_neigh) | |
2179 | { | |
2180 | void *hdr; | |
2181 | unsigned int last_seen_msecs; | |
2182 | ||
2183 | last_seen_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen); | |
2184 | ||
2185 | hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, | |
2186 | NLM_F_MULTI, BATADV_CMD_GET_NEIGHBORS); | |
2187 | if (!hdr) | |
2188 | return -ENOBUFS; | |
2189 | ||
2190 | if (nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN, | |
2191 | hardif_neigh->addr) || | |
2192 | nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, | |
2193 | hardif_neigh->if_incoming->net_dev->ifindex) || | |
2194 | nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, | |
2195 | last_seen_msecs)) | |
2196 | goto nla_put_failure; | |
2197 | ||
2198 | genlmsg_end(msg, hdr); | |
2199 | return 0; | |
2200 | ||
2201 | nla_put_failure: | |
2202 | genlmsg_cancel(msg, hdr); | |
2203 | return -EMSGSIZE; | |
2204 | } | |
2205 | ||
2206 | /** | |
7e9a8c2c | 2207 | * batadv_iv_ogm_neigh_dump_hardif() - Dump the neighbours of a hard interface |
024f99cb MS |
2208 | * into a message |
2209 | * @msg: Netlink message to dump into | |
2210 | * @portid: Port making netlink request | |
2211 | * @seq: Sequence number of netlink message | |
2212 | * @bat_priv: The bat priv with all the soft interface information | |
2213 | * @hard_iface: Hard interface to dump the neighbours for | |
2214 | * @idx_s: Number of entries to skip | |
2215 | * | |
2216 | * This function assumes the caller holds rcu_read_lock(). | |
2217 | * | |
2218 | * Return: Error code, or 0 on success | |
2219 | */ | |
2220 | static int | |
2221 | batadv_iv_ogm_neigh_dump_hardif(struct sk_buff *msg, u32 portid, u32 seq, | |
2222 | struct batadv_priv *bat_priv, | |
2223 | struct batadv_hard_iface *hard_iface, | |
2224 | int *idx_s) | |
2225 | { | |
2226 | struct batadv_hardif_neigh_node *hardif_neigh; | |
2227 | int idx = 0; | |
2228 | ||
2229 | hlist_for_each_entry_rcu(hardif_neigh, | |
2230 | &hard_iface->neigh_list, list) { | |
2231 | if (idx++ < *idx_s) | |
2232 | continue; | |
2233 | ||
2234 | if (batadv_iv_ogm_neigh_dump_neigh(msg, portid, seq, | |
2235 | hardif_neigh)) { | |
2236 | *idx_s = idx - 1; | |
2237 | return -EMSGSIZE; | |
2238 | } | |
2239 | } | |
2240 | ||
2241 | *idx_s = 0; | |
2242 | return 0; | |
2243 | } | |
2244 | ||
2245 | /** | |
7e9a8c2c | 2246 | * batadv_iv_ogm_neigh_dump() - Dump the neighbours into a message |
024f99cb MS |
2247 | * @msg: Netlink message to dump into |
2248 | * @cb: Control block containing additional options | |
2249 | * @bat_priv: The bat priv with all the soft interface information | |
2250 | * @single_hardif: Limit dump to this hard interfaace | |
2251 | */ | |
2252 | static void | |
2253 | batadv_iv_ogm_neigh_dump(struct sk_buff *msg, struct netlink_callback *cb, | |
2254 | struct batadv_priv *bat_priv, | |
2255 | struct batadv_hard_iface *single_hardif) | |
2256 | { | |
2257 | struct batadv_hard_iface *hard_iface; | |
2258 | int i_hardif = 0; | |
2259 | int i_hardif_s = cb->args[0]; | |
2260 | int idx = cb->args[1]; | |
2261 | int portid = NETLINK_CB(cb->skb).portid; | |
2262 | ||
2263 | rcu_read_lock(); | |
2264 | if (single_hardif) { | |
2265 | if (i_hardif_s == 0) { | |
2266 | if (batadv_iv_ogm_neigh_dump_hardif(msg, portid, | |
2267 | cb->nlh->nlmsg_seq, | |
2268 | bat_priv, | |
2269 | single_hardif, | |
2270 | &idx) == 0) | |
2271 | i_hardif++; | |
2272 | } | |
2273 | } else { | |
2274 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, | |
2275 | list) { | |
2276 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
2277 | continue; | |
2278 | ||
2279 | if (i_hardif++ < i_hardif_s) | |
2280 | continue; | |
2281 | ||
2282 | if (batadv_iv_ogm_neigh_dump_hardif(msg, portid, | |
2283 | cb->nlh->nlmsg_seq, | |
2284 | bat_priv, | |
2285 | hard_iface, &idx)) { | |
2286 | i_hardif--; | |
2287 | break; | |
2288 | } | |
2289 | } | |
2290 | } | |
2291 | rcu_read_unlock(); | |
2292 | ||
2293 | cb->args[0] = i_hardif; | |
2294 | cb->args[1] = idx; | |
2295 | } | |
2296 | ||
57b12502 | 2297 | /** |
7e9a8c2c | 2298 | * batadv_iv_ogm_neigh_cmp() - compare the metrics of two neighbors |
57b12502 MP |
2299 | * @neigh1: the first neighbor object of the comparison |
2300 | * @if_outgoing1: outgoing interface for the first neighbor | |
2301 | * @neigh2: the second neighbor object of the comparison | |
2302 | * @if_outgoing2: outgoing interface for the second neighbor | |
2303 | * | |
2304 | * Return: a value less, equal to or greater than 0 if the metric via neigh1 is | |
2305 | * lower, the same as or higher than the metric via neigh2 | |
2306 | */ | |
2307 | static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node *neigh1, | |
2308 | struct batadv_hard_iface *if_outgoing1, | |
2309 | struct batadv_neigh_node *neigh2, | |
2310 | struct batadv_hard_iface *if_outgoing2) | |
2311 | { | |
2312 | bool ret; | |
2313 | int diff; | |
2314 | ||
2315 | ret = batadv_iv_ogm_neigh_diff(neigh1, if_outgoing1, neigh2, | |
2316 | if_outgoing2, &diff); | |
2317 | if (!ret) | |
2318 | return 0; | |
2319 | ||
89652331 | 2320 | return diff; |
a3285a8f AQ |
2321 | } |
2322 | ||
c43c981e | 2323 | /** |
7e9a8c2c | 2324 | * batadv_iv_ogm_neigh_is_sob() - check if neigh1 is similarly good or better |
18165f6f | 2325 | * than neigh2 from the metric prospective |
c43c981e | 2326 | * @neigh1: the first neighbor object of the comparison |
95298a91 | 2327 | * @if_outgoing1: outgoing interface for the first neighbor |
c43c981e | 2328 | * @neigh2: the second neighbor object of the comparison |
89652331 | 2329 | * @if_outgoing2: outgoing interface for the second neighbor |
95298a91 | 2330 | * |
62fe710f | 2331 | * Return: true if the metric via neigh1 is equally good or better than |
89652331 | 2332 | * the metric via neigh2, false otherwise. |
c43c981e | 2333 | */ |
89652331 | 2334 | static bool |
18165f6f | 2335 | batadv_iv_ogm_neigh_is_sob(struct batadv_neigh_node *neigh1, |
89652331 SW |
2336 | struct batadv_hard_iface *if_outgoing1, |
2337 | struct batadv_neigh_node *neigh2, | |
2338 | struct batadv_hard_iface *if_outgoing2) | |
c43c981e | 2339 | { |
89652331 | 2340 | bool ret; |
57b12502 | 2341 | int diff; |
c43c981e | 2342 | |
57b12502 MP |
2343 | ret = batadv_iv_ogm_neigh_diff(neigh1, if_outgoing1, neigh2, |
2344 | if_outgoing2, &diff); | |
2345 | if (!ret) | |
2346 | return false; | |
89652331 | 2347 | |
57b12502 | 2348 | ret = diff > -BATADV_TQ_SIMILARITY_THRESHOLD; |
89652331 | 2349 | return ret; |
c43c981e AQ |
2350 | } |
2351 | ||
f0d97253 AQ |
2352 | static void batadv_iv_iface_activate(struct batadv_hard_iface *hard_iface) |
2353 | { | |
2354 | /* begin scheduling originator messages on that interface */ | |
2355 | batadv_iv_ogm_schedule(hard_iface); | |
2356 | } | |
2357 | ||
1a9070ec | 2358 | /** |
7e9a8c2c | 2359 | * batadv_iv_init_sel_class() - initialize GW selection class |
1a9070ec SE |
2360 | * @bat_priv: the bat priv with all the soft interface information |
2361 | */ | |
2362 | static void batadv_iv_init_sel_class(struct batadv_priv *bat_priv) | |
2363 | { | |
2364 | /* set default TQ difference threshold to 20 */ | |
2365 | atomic_set(&bat_priv->gw.sel_class, 20); | |
2366 | } | |
2367 | ||
34d99cfe AQ |
2368 | static struct batadv_gw_node * |
2369 | batadv_iv_gw_get_best_gw_node(struct batadv_priv *bat_priv) | |
2370 | { | |
2371 | struct batadv_neigh_node *router; | |
2372 | struct batadv_neigh_ifinfo *router_ifinfo; | |
2373 | struct batadv_gw_node *gw_node, *curr_gw = NULL; | |
2374 | u64 max_gw_factor = 0; | |
2375 | u64 tmp_gw_factor = 0; | |
2376 | u8 max_tq = 0; | |
2377 | u8 tq_avg; | |
2378 | struct batadv_orig_node *orig_node; | |
2379 | ||
2380 | rcu_read_lock(); | |
70ea5cee | 2381 | hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.gateway_list, list) { |
34d99cfe AQ |
2382 | orig_node = gw_node->orig_node; |
2383 | router = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT); | |
2384 | if (!router) | |
2385 | continue; | |
2386 | ||
2387 | router_ifinfo = batadv_neigh_ifinfo_get(router, | |
2388 | BATADV_IF_DEFAULT); | |
2389 | if (!router_ifinfo) | |
2390 | goto next; | |
2391 | ||
2392 | if (!kref_get_unless_zero(&gw_node->refcount)) | |
2393 | goto next; | |
2394 | ||
2395 | tq_avg = router_ifinfo->bat_iv.tq_avg; | |
2396 | ||
2397 | switch (atomic_read(&bat_priv->gw.sel_class)) { | |
2398 | case 1: /* fast connection */ | |
2399 | tmp_gw_factor = tq_avg * tq_avg; | |
2400 | tmp_gw_factor *= gw_node->bandwidth_down; | |
2401 | tmp_gw_factor *= 100 * 100; | |
2402 | tmp_gw_factor >>= 18; | |
2403 | ||
825ffe1f SE |
2404 | if (tmp_gw_factor > max_gw_factor || |
2405 | (tmp_gw_factor == max_gw_factor && | |
2406 | tq_avg > max_tq)) { | |
34d99cfe AQ |
2407 | if (curr_gw) |
2408 | batadv_gw_node_put(curr_gw); | |
2409 | curr_gw = gw_node; | |
2410 | kref_get(&curr_gw->refcount); | |
2411 | } | |
2412 | break; | |
2413 | ||
2414 | default: /* 2: stable connection (use best statistic) | |
2415 | * 3: fast-switch (use best statistic but change as | |
2416 | * soon as a better gateway appears) | |
2417 | * XX: late-switch (use best statistic but change as | |
2418 | * soon as a better gateway appears which has | |
2419 | * $routing_class more tq points) | |
2420 | */ | |
2421 | if (tq_avg > max_tq) { | |
2422 | if (curr_gw) | |
2423 | batadv_gw_node_put(curr_gw); | |
2424 | curr_gw = gw_node; | |
2425 | kref_get(&curr_gw->refcount); | |
2426 | } | |
2427 | break; | |
2428 | } | |
2429 | ||
2430 | if (tq_avg > max_tq) | |
2431 | max_tq = tq_avg; | |
2432 | ||
2433 | if (tmp_gw_factor > max_gw_factor) | |
2434 | max_gw_factor = tmp_gw_factor; | |
2435 | ||
2436 | batadv_gw_node_put(gw_node); | |
2437 | ||
2438 | next: | |
2439 | batadv_neigh_node_put(router); | |
2440 | if (router_ifinfo) | |
2441 | batadv_neigh_ifinfo_put(router_ifinfo); | |
2442 | } | |
2443 | rcu_read_unlock(); | |
2444 | ||
2445 | return curr_gw; | |
2446 | } | |
2447 | ||
2448 | static bool batadv_iv_gw_is_eligible(struct batadv_priv *bat_priv, | |
2449 | struct batadv_orig_node *curr_gw_orig, | |
2450 | struct batadv_orig_node *orig_node) | |
2451 | { | |
2452 | struct batadv_neigh_ifinfo *router_orig_ifinfo = NULL; | |
2453 | struct batadv_neigh_ifinfo *router_gw_ifinfo = NULL; | |
2454 | struct batadv_neigh_node *router_gw = NULL; | |
2455 | struct batadv_neigh_node *router_orig = NULL; | |
2456 | u8 gw_tq_avg, orig_tq_avg; | |
2457 | bool ret = false; | |
2458 | ||
2459 | /* dynamic re-election is performed only on fast or late switch */ | |
2460 | if (atomic_read(&bat_priv->gw.sel_class) <= 2) | |
2461 | return false; | |
2462 | ||
2463 | router_gw = batadv_orig_router_get(curr_gw_orig, BATADV_IF_DEFAULT); | |
2464 | if (!router_gw) { | |
2465 | ret = true; | |
2466 | goto out; | |
2467 | } | |
2468 | ||
2469 | router_gw_ifinfo = batadv_neigh_ifinfo_get(router_gw, | |
2470 | BATADV_IF_DEFAULT); | |
2471 | if (!router_gw_ifinfo) { | |
2472 | ret = true; | |
2473 | goto out; | |
2474 | } | |
2475 | ||
2476 | router_orig = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT); | |
2477 | if (!router_orig) | |
2478 | goto out; | |
2479 | ||
2480 | router_orig_ifinfo = batadv_neigh_ifinfo_get(router_orig, | |
2481 | BATADV_IF_DEFAULT); | |
2482 | if (!router_orig_ifinfo) | |
2483 | goto out; | |
2484 | ||
2485 | gw_tq_avg = router_gw_ifinfo->bat_iv.tq_avg; | |
2486 | orig_tq_avg = router_orig_ifinfo->bat_iv.tq_avg; | |
2487 | ||
2488 | /* the TQ value has to be better */ | |
2489 | if (orig_tq_avg < gw_tq_avg) | |
2490 | goto out; | |
2491 | ||
2492 | /* if the routing class is greater than 3 the value tells us how much | |
2493 | * greater the TQ value of the new gateway must be | |
2494 | */ | |
2495 | if ((atomic_read(&bat_priv->gw.sel_class) > 3) && | |
2496 | (orig_tq_avg - gw_tq_avg < atomic_read(&bat_priv->gw.sel_class))) | |
2497 | goto out; | |
2498 | ||
2499 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
2500 | "Restarting gateway selection: better gateway found (tq curr: %i, tq new: %i)\n", | |
2501 | gw_tq_avg, orig_tq_avg); | |
2502 | ||
2503 | ret = true; | |
2504 | out: | |
2505 | if (router_gw_ifinfo) | |
2506 | batadv_neigh_ifinfo_put(router_gw_ifinfo); | |
2507 | if (router_orig_ifinfo) | |
2508 | batadv_neigh_ifinfo_put(router_orig_ifinfo); | |
2509 | if (router_gw) | |
2510 | batadv_neigh_node_put(router_gw); | |
2511 | if (router_orig) | |
2512 | batadv_neigh_node_put(router_orig); | |
2513 | ||
2514 | return ret; | |
2515 | } | |
2516 | ||
dc1cbd14 | 2517 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
34d99cfe AQ |
2518 | /* fails if orig_node has no router */ |
2519 | static int batadv_iv_gw_write_buffer_text(struct batadv_priv *bat_priv, | |
2520 | struct seq_file *seq, | |
2521 | const struct batadv_gw_node *gw_node) | |
2522 | { | |
2523 | struct batadv_gw_node *curr_gw; | |
2524 | struct batadv_neigh_node *router; | |
2525 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; | |
2526 | int ret = -1; | |
2527 | ||
2528 | router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT); | |
2529 | if (!router) | |
2530 | goto out; | |
2531 | ||
2532 | router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT); | |
2533 | if (!router_ifinfo) | |
2534 | goto out; | |
2535 | ||
2536 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); | |
2537 | ||
2538 | seq_printf(seq, "%s %pM (%3i) %pM [%10s]: %u.%u/%u.%u MBit\n", | |
2539 | (curr_gw == gw_node ? "=>" : " "), | |
2540 | gw_node->orig_node->orig, | |
2541 | router_ifinfo->bat_iv.tq_avg, router->addr, | |
2542 | router->if_incoming->net_dev->name, | |
2543 | gw_node->bandwidth_down / 10, | |
2544 | gw_node->bandwidth_down % 10, | |
2545 | gw_node->bandwidth_up / 10, | |
2546 | gw_node->bandwidth_up % 10); | |
2547 | ret = seq_has_overflowed(seq) ? -1 : 0; | |
2548 | ||
2549 | if (curr_gw) | |
2550 | batadv_gw_node_put(curr_gw); | |
2551 | out: | |
2552 | if (router_ifinfo) | |
2553 | batadv_neigh_ifinfo_put(router_ifinfo); | |
2554 | if (router) | |
2555 | batadv_neigh_node_put(router); | |
2556 | return ret; | |
2557 | } | |
2558 | ||
2559 | static void batadv_iv_gw_print(struct batadv_priv *bat_priv, | |
2560 | struct seq_file *seq) | |
2561 | { | |
2562 | struct batadv_gw_node *gw_node; | |
2563 | int gw_count = 0; | |
2564 | ||
2565 | seq_puts(seq, | |
2566 | " Gateway (#/255) Nexthop [outgoingIF]: advertised uplink bandwidth\n"); | |
2567 | ||
2568 | rcu_read_lock(); | |
70ea5cee | 2569 | hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.gateway_list, list) { |
34d99cfe AQ |
2570 | /* fails if orig_node has no router */ |
2571 | if (batadv_iv_gw_write_buffer_text(bat_priv, seq, gw_node) < 0) | |
2572 | continue; | |
2573 | ||
2574 | gw_count++; | |
2575 | } | |
2576 | rcu_read_unlock(); | |
2577 | ||
2578 | if (gw_count == 0) | |
2579 | seq_puts(seq, "No gateways in range ...\n"); | |
2580 | } | |
dc1cbd14 | 2581 | #endif |
34d99cfe | 2582 | |
efb766af | 2583 | /** |
7e9a8c2c | 2584 | * batadv_iv_gw_dump_entry() - Dump a gateway into a message |
efb766af AL |
2585 | * @msg: Netlink message to dump into |
2586 | * @portid: Port making netlink request | |
2587 | * @seq: Sequence number of netlink message | |
2588 | * @bat_priv: The bat priv with all the soft interface information | |
2589 | * @gw_node: Gateway to be dumped | |
2590 | * | |
2591 | * Return: Error code, or 0 on success | |
2592 | */ | |
2593 | static int batadv_iv_gw_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, | |
2594 | struct batadv_priv *bat_priv, | |
2595 | struct batadv_gw_node *gw_node) | |
2596 | { | |
2597 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; | |
2598 | struct batadv_neigh_node *router; | |
b5685d26 | 2599 | struct batadv_gw_node *curr_gw = NULL; |
10d57028 | 2600 | int ret = 0; |
efb766af AL |
2601 | void *hdr; |
2602 | ||
2603 | router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT); | |
2604 | if (!router) | |
2605 | goto out; | |
2606 | ||
2607 | router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT); | |
2608 | if (!router_ifinfo) | |
2609 | goto out; | |
2610 | ||
2611 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); | |
2612 | ||
2613 | hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, | |
2614 | NLM_F_MULTI, BATADV_CMD_GET_GATEWAYS); | |
2615 | if (!hdr) { | |
2616 | ret = -ENOBUFS; | |
2617 | goto out; | |
2618 | } | |
2619 | ||
2620 | ret = -EMSGSIZE; | |
2621 | ||
2622 | if (curr_gw == gw_node) | |
2623 | if (nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) { | |
2624 | genlmsg_cancel(msg, hdr); | |
2625 | goto out; | |
2626 | } | |
2627 | ||
2628 | if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, | |
2629 | gw_node->orig_node->orig) || | |
2630 | nla_put_u8(msg, BATADV_ATTR_TQ, router_ifinfo->bat_iv.tq_avg) || | |
2631 | nla_put(msg, BATADV_ATTR_ROUTER, ETH_ALEN, | |
2632 | router->addr) || | |
2633 | nla_put_string(msg, BATADV_ATTR_HARD_IFNAME, | |
2634 | router->if_incoming->net_dev->name) || | |
2635 | nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_DOWN, | |
2636 | gw_node->bandwidth_down) || | |
2637 | nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_UP, | |
2638 | gw_node->bandwidth_up)) { | |
2639 | genlmsg_cancel(msg, hdr); | |
2640 | goto out; | |
2641 | } | |
2642 | ||
2643 | genlmsg_end(msg, hdr); | |
2644 | ret = 0; | |
2645 | ||
2646 | out: | |
b5685d26 SE |
2647 | if (curr_gw) |
2648 | batadv_gw_node_put(curr_gw); | |
efb766af AL |
2649 | if (router_ifinfo) |
2650 | batadv_neigh_ifinfo_put(router_ifinfo); | |
2651 | if (router) | |
2652 | batadv_neigh_node_put(router); | |
2653 | return ret; | |
2654 | } | |
2655 | ||
2656 | /** | |
7e9a8c2c | 2657 | * batadv_iv_gw_dump() - Dump gateways into a message |
efb766af AL |
2658 | * @msg: Netlink message to dump into |
2659 | * @cb: Control block containing additional options | |
2660 | * @bat_priv: The bat priv with all the soft interface information | |
2661 | */ | |
2662 | static void batadv_iv_gw_dump(struct sk_buff *msg, struct netlink_callback *cb, | |
2663 | struct batadv_priv *bat_priv) | |
2664 | { | |
2665 | int portid = NETLINK_CB(cb->skb).portid; | |
2666 | struct batadv_gw_node *gw_node; | |
2667 | int idx_skip = cb->args[0]; | |
2668 | int idx = 0; | |
2669 | ||
2670 | rcu_read_lock(); | |
70ea5cee | 2671 | hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.gateway_list, list) { |
efb766af AL |
2672 | if (idx++ < idx_skip) |
2673 | continue; | |
2674 | ||
2675 | if (batadv_iv_gw_dump_entry(msg, portid, cb->nlh->nlmsg_seq, | |
2676 | bat_priv, gw_node)) { | |
2677 | idx_skip = idx - 1; | |
2678 | goto unlock; | |
2679 | } | |
2680 | } | |
2681 | ||
2682 | idx_skip = idx; | |
2683 | unlock: | |
2684 | rcu_read_unlock(); | |
2685 | ||
2686 | cb->args[0] = idx_skip; | |
2687 | } | |
2688 | ||
56303d34 | 2689 | static struct batadv_algo_ops batadv_batman_iv __read_mostly = { |
519d3497 | 2690 | .name = "BATMAN_IV", |
29824a55 AQ |
2691 | .iface = { |
2692 | .activate = batadv_iv_iface_activate, | |
2693 | .enable = batadv_iv_ogm_iface_enable, | |
2694 | .disable = batadv_iv_ogm_iface_disable, | |
2695 | .update_mac = batadv_iv_ogm_iface_update_mac, | |
2696 | .primary_set = batadv_iv_ogm_primary_iface_set, | |
2697 | }, | |
2698 | .neigh = { | |
2699 | .cmp = batadv_iv_ogm_neigh_cmp, | |
2700 | .is_similar_or_better = batadv_iv_ogm_neigh_is_sob, | |
dc1cbd14 | 2701 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
29824a55 | 2702 | .print = batadv_iv_neigh_print, |
dc1cbd14 | 2703 | #endif |
024f99cb | 2704 | .dump = batadv_iv_ogm_neigh_dump, |
29824a55 AQ |
2705 | }, |
2706 | .orig = { | |
dc1cbd14 | 2707 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
29824a55 | 2708 | .print = batadv_iv_ogm_orig_print, |
dc1cbd14 | 2709 | #endif |
024f99cb | 2710 | .dump = batadv_iv_ogm_orig_dump, |
29824a55 | 2711 | }, |
34d99cfe | 2712 | .gw = { |
1a9070ec | 2713 | .init_sel_class = batadv_iv_init_sel_class, |
34d99cfe AQ |
2714 | .get_best_gw_node = batadv_iv_gw_get_best_gw_node, |
2715 | .is_eligible = batadv_iv_gw_is_eligible, | |
dc1cbd14 | 2716 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
34d99cfe | 2717 | .print = batadv_iv_gw_print, |
dc1cbd14 | 2718 | #endif |
efb766af | 2719 | .dump = batadv_iv_gw_dump, |
34d99cfe | 2720 | }, |
1c280471 ML |
2721 | }; |
2722 | ||
ff15c27c SE |
2723 | /** |
2724 | * batadv_iv_init() - B.A.T.M.A.N. IV initialization function | |
2725 | * | |
2726 | * Return: 0 on success or negative error number in case of failure | |
2727 | */ | |
81c524f7 | 2728 | int __init batadv_iv_init(void) |
1c280471 | 2729 | { |
c3e29312 ML |
2730 | int ret; |
2731 | ||
2732 | /* batman originator packet */ | |
acd34afa SE |
2733 | ret = batadv_recv_handler_register(BATADV_IV_OGM, |
2734 | batadv_iv_ogm_receive); | |
c3e29312 ML |
2735 | if (ret < 0) |
2736 | goto out; | |
2737 | ||
fe8bc396 | 2738 | ret = batadv_algo_register(&batadv_batman_iv); |
c3e29312 ML |
2739 | if (ret < 0) |
2740 | goto handler_unregister; | |
2741 | ||
2742 | goto out; | |
2743 | ||
2744 | handler_unregister: | |
acd34afa | 2745 | batadv_recv_handler_unregister(BATADV_IV_OGM); |
c3e29312 ML |
2746 | out: |
2747 | return ret; | |
1c280471 | 2748 | } |