Commit | Line | Data |
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7db7d9f3 | 1 | // SPDX-License-Identifier: GPL-2.0 |
7a79d717 | 2 | /* Copyright (C) 2007-2019 B.A.T.M.A.N. contributors: |
fc957275 ML |
3 | * |
4 | * Marek Lindner, Simon Wunderlich | |
fc957275 ML |
5 | */ |
6 | ||
a2d08166 | 7 | #include "bat_iv_ogm.h" |
fc957275 | 8 | #include "main.h" |
1e2c2a4f SE |
9 | |
10 | #include <linux/atomic.h> | |
11 | #include <linux/bitmap.h> | |
12 | #include <linux/bitops.h> | |
13 | #include <linux/bug.h> | |
14 | #include <linux/byteorder/generic.h> | |
15 | #include <linux/cache.h> | |
16 | #include <linux/errno.h> | |
17 | #include <linux/etherdevice.h> | |
b92b94ac | 18 | #include <linux/gfp.h> |
1e2c2a4f SE |
19 | #include <linux/if_ether.h> |
20 | #include <linux/init.h> | |
21 | #include <linux/jiffies.h> | |
f0d97253 | 22 | #include <linux/kernel.h> |
77ae32e8 | 23 | #include <linux/kref.h> |
fcafa5e7 | 24 | #include <linux/list.h> |
1e2c2a4f | 25 | #include <linux/netdevice.h> |
024f99cb | 26 | #include <linux/netlink.h> |
1e2c2a4f SE |
27 | #include <linux/pkt_sched.h> |
28 | #include <linux/printk.h> | |
29 | #include <linux/random.h> | |
30 | #include <linux/rculist.h> | |
31 | #include <linux/rcupdate.h> | |
32 | #include <linux/seq_file.h> | |
33 | #include <linux/skbuff.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/spinlock.h> | |
36 | #include <linux/stddef.h> | |
37 | #include <linux/string.h> | |
38 | #include <linux/types.h> | |
39 | #include <linux/workqueue.h> | |
024f99cb MS |
40 | #include <net/genetlink.h> |
41 | #include <net/netlink.h> | |
fec149f5 | 42 | #include <uapi/linux/batadv_packet.h> |
024f99cb | 43 | #include <uapi/linux/batman_adv.h> |
1e2c2a4f | 44 | |
a2d08166 | 45 | #include "bat_algo.h" |
1e2c2a4f | 46 | #include "bitarray.h" |
34d99cfe | 47 | #include "gateway_client.h" |
1e2c2a4f SE |
48 | #include "hard-interface.h" |
49 | #include "hash.h" | |
ba412080 | 50 | #include "log.h" |
024f99cb | 51 | #include "netlink.h" |
1e2c2a4f | 52 | #include "network-coding.h" |
fc957275 ML |
53 | #include "originator.h" |
54 | #include "routing.h" | |
fc957275 | 55 | #include "send.h" |
1e2c2a4f | 56 | #include "translation-table.h" |
1f8dce49 | 57 | #include "tvlv.h" |
fc957275 | 58 | |
f0d97253 AQ |
59 | static void batadv_iv_send_outstanding_bat_ogm_packet(struct work_struct *work); |
60 | ||
791c2a2d | 61 | /** |
95298a91 | 62 | * enum batadv_dup_status - duplicate status |
791c2a2d AQ |
63 | */ |
64 | enum batadv_dup_status { | |
8b84cc4f | 65 | /** @BATADV_NO_DUP: the packet is no duplicate */ |
791c2a2d | 66 | BATADV_NO_DUP = 0, |
8b84cc4f SE |
67 | |
68 | /** | |
69 | * @BATADV_ORIG_DUP: OGM is a duplicate in the originator (but not for | |
70 | * the neighbor) | |
71 | */ | |
791c2a2d | 72 | BATADV_ORIG_DUP, |
8b84cc4f SE |
73 | |
74 | /** @BATADV_NEIGH_DUP: OGM is a duplicate for the neighbor */ | |
791c2a2d | 75 | BATADV_NEIGH_DUP, |
8b84cc4f SE |
76 | |
77 | /** | |
78 | * @BATADV_PROTECTED: originator is currently protected (after reboot) | |
79 | */ | |
791c2a2d AQ |
80 | BATADV_PROTECTED, |
81 | }; | |
82 | ||
24a5deeb | 83 | /** |
7e9a8c2c | 84 | * batadv_ring_buffer_set() - update the ring buffer with the given value |
24a5deeb AQ |
85 | * @lq_recv: pointer to the ring buffer |
86 | * @lq_index: index to store the value at | |
87 | * @value: value to store in the ring buffer | |
88 | */ | |
6b5e971a | 89 | static void batadv_ring_buffer_set(u8 lq_recv[], u8 *lq_index, u8 value) |
24a5deeb AQ |
90 | { |
91 | lq_recv[*lq_index] = value; | |
92 | *lq_index = (*lq_index + 1) % BATADV_TQ_GLOBAL_WINDOW_SIZE; | |
93 | } | |
94 | ||
95 | /** | |
7e9a8c2c | 96 | * batadv_ring_buffer_avg() - compute the average of all non-zero values stored |
24a5deeb AQ |
97 | * in the given ring buffer |
98 | * @lq_recv: pointer to the ring buffer | |
99 | * | |
62fe710f | 100 | * Return: computed average value. |
24a5deeb | 101 | */ |
6b5e971a | 102 | static u8 batadv_ring_buffer_avg(const u8 lq_recv[]) |
24a5deeb | 103 | { |
6b5e971a SE |
104 | const u8 *ptr; |
105 | u16 count = 0; | |
106 | u16 i = 0; | |
107 | u16 sum = 0; | |
24a5deeb AQ |
108 | |
109 | ptr = lq_recv; | |
110 | ||
111 | while (i < BATADV_TQ_GLOBAL_WINDOW_SIZE) { | |
112 | if (*ptr != 0) { | |
113 | count++; | |
114 | sum += *ptr; | |
115 | } | |
116 | ||
117 | i++; | |
118 | ptr++; | |
119 | } | |
120 | ||
121 | if (count == 0) | |
122 | return 0; | |
123 | ||
6b5e971a | 124 | return (u8)(sum / count); |
24a5deeb | 125 | } |
d98cae64 | 126 | |
bbad0a5e | 127 | /** |
7e9a8c2c SE |
128 | * batadv_iv_ogm_orig_get() - retrieve or create (if does not exist) an |
129 | * originator | |
bbad0a5e AQ |
130 | * @bat_priv: the bat priv with all the soft interface information |
131 | * @addr: mac address of the originator | |
132 | * | |
62fe710f | 133 | * Return: the originator object corresponding to the passed mac address or NULL |
bbad0a5e AQ |
134 | * on failure. |
135 | * If the object does not exists it is created an initialised. | |
136 | */ | |
137 | static struct batadv_orig_node * | |
6b5e971a | 138 | batadv_iv_ogm_orig_get(struct batadv_priv *bat_priv, const u8 *addr) |
bbad0a5e AQ |
139 | { |
140 | struct batadv_orig_node *orig_node; | |
f22e0893 | 141 | int hash_added; |
bbad0a5e AQ |
142 | |
143 | orig_node = batadv_orig_hash_find(bat_priv, addr); | |
144 | if (orig_node) | |
145 | return orig_node; | |
146 | ||
147 | orig_node = batadv_orig_node_new(bat_priv, addr); | |
148 | if (!orig_node) | |
149 | return NULL; | |
150 | ||
151 | spin_lock_init(&orig_node->bat_iv.ogm_cnt_lock); | |
152 | ||
55db2d59 | 153 | kref_get(&orig_node->refcount); |
bbad0a5e AQ |
154 | hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig, |
155 | batadv_choose_orig, orig_node, | |
156 | &orig_node->hash_entry); | |
157 | if (hash_added != 0) | |
55db2d59 | 158 | goto free_orig_node_hash; |
bbad0a5e AQ |
159 | |
160 | return orig_node; | |
161 | ||
55db2d59 | 162 | free_orig_node_hash: |
dee222c7 | 163 | /* reference for batadv_hash_add */ |
5d967310 | 164 | batadv_orig_node_put(orig_node); |
dee222c7 | 165 | /* reference from batadv_orig_node_new */ |
5d967310 | 166 | batadv_orig_node_put(orig_node); |
bbad0a5e AQ |
167 | |
168 | return NULL; | |
169 | } | |
170 | ||
56303d34 SE |
171 | static struct batadv_neigh_node * |
172 | batadv_iv_ogm_neigh_new(struct batadv_hard_iface *hard_iface, | |
6b5e971a | 173 | const u8 *neigh_addr, |
56303d34 | 174 | struct batadv_orig_node *orig_node, |
863dd7a8 | 175 | struct batadv_orig_node *orig_neigh) |
7ae8b285 | 176 | { |
741aa06b | 177 | struct batadv_neigh_node *neigh_node; |
7ae8b285 | 178 | |
6f0a6b5e ML |
179 | neigh_node = batadv_neigh_node_get_or_create(orig_node, |
180 | hard_iface, neigh_addr); | |
7ae8b285 ML |
181 | if (!neigh_node) |
182 | goto out; | |
183 | ||
89652331 | 184 | neigh_node->orig_node = orig_neigh; |
7ae8b285 | 185 | |
7ae8b285 ML |
186 | out: |
187 | return neigh_node; | |
188 | } | |
189 | ||
56303d34 | 190 | static int batadv_iv_ogm_iface_enable(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 191 | { |
96412690 | 192 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 193 | unsigned char *ogm_buff; |
6b5e971a | 194 | u32 random_seqno; |
d7d32ec0 ML |
195 | |
196 | /* randomize initial seqno to avoid collision */ | |
197 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
14511519 | 198 | atomic_set(&hard_iface->bat_iv.ogm_seqno, random_seqno); |
d0b9fd89 | 199 | |
14511519 ML |
200 | hard_iface->bat_iv.ogm_buff_len = BATADV_OGM_HLEN; |
201 | ogm_buff = kmalloc(hard_iface->bat_iv.ogm_buff_len, GFP_ATOMIC); | |
202 | if (!ogm_buff) | |
42d9f2cb | 203 | return -ENOMEM; |
77af7575 | 204 | |
14511519 ML |
205 | hard_iface->bat_iv.ogm_buff = ogm_buff; |
206 | ||
207 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; | |
a40d9b07 SW |
208 | batadv_ogm_packet->packet_type = BATADV_IV_OGM; |
209 | batadv_ogm_packet->version = BATADV_COMPAT_VERSION; | |
210 | batadv_ogm_packet->ttl = 2; | |
96412690 | 211 | batadv_ogm_packet->flags = BATADV_NO_FLAGS; |
414254e3 | 212 | batadv_ogm_packet->reserved = 0; |
96412690 | 213 | batadv_ogm_packet->tq = BATADV_TQ_MAX_VALUE; |
77af7575 | 214 | |
42d9f2cb | 215 | return 0; |
d0b9fd89 ML |
216 | } |
217 | ||
56303d34 | 218 | static void batadv_iv_ogm_iface_disable(struct batadv_hard_iface *hard_iface) |
00a50076 | 219 | { |
14511519 ML |
220 | kfree(hard_iface->bat_iv.ogm_buff); |
221 | hard_iface->bat_iv.ogm_buff = NULL; | |
00a50076 ML |
222 | } |
223 | ||
56303d34 | 224 | static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 225 | { |
96412690 | 226 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 227 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 228 | |
14511519 | 229 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
8fdd0153 AQ |
230 | ether_addr_copy(batadv_ogm_packet->orig, |
231 | hard_iface->net_dev->dev_addr); | |
232 | ether_addr_copy(batadv_ogm_packet->prev_sender, | |
233 | hard_iface->net_dev->dev_addr); | |
d0b9fd89 ML |
234 | } |
235 | ||
56303d34 SE |
236 | static void |
237 | batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface) | |
d0b9fd89 | 238 | { |
96412690 | 239 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 240 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 241 | |
14511519 | 242 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
a40d9b07 | 243 | batadv_ogm_packet->ttl = BATADV_TTL; |
d0b9fd89 ML |
244 | } |
245 | ||
b9dacc52 | 246 | /* when do we schedule our own ogm to be sent */ |
fe8bc396 | 247 | static unsigned long |
56303d34 | 248 | batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv) |
b9dacc52 | 249 | { |
42d0b044 SE |
250 | unsigned int msecs; |
251 | ||
252 | msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER; | |
e76e4320 | 253 | msecs += prandom_u32() % (2 * BATADV_JITTER); |
42d0b044 SE |
254 | |
255 | return jiffies + msecs_to_jiffies(msecs); | |
b9dacc52 ML |
256 | } |
257 | ||
258 | /* when do we schedule a ogm packet to be sent */ | |
fe8bc396 | 259 | static unsigned long batadv_iv_ogm_fwd_send_time(void) |
b9dacc52 | 260 | { |
e76e4320 | 261 | return jiffies + msecs_to_jiffies(prandom_u32() % (BATADV_JITTER / 2)); |
b9dacc52 ML |
262 | } |
263 | ||
264 | /* apply hop penalty for a normal link */ | |
6b5e971a | 265 | static u8 batadv_hop_penalty(u8 tq, const struct batadv_priv *bat_priv) |
b9dacc52 ML |
266 | { |
267 | int hop_penalty = atomic_read(&bat_priv->hop_penalty); | |
42d0b044 SE |
268 | int new_tq; |
269 | ||
270 | new_tq = tq * (BATADV_TQ_MAX_VALUE - hop_penalty); | |
271 | new_tq /= BATADV_TQ_MAX_VALUE; | |
272 | ||
273 | return new_tq; | |
b9dacc52 ML |
274 | } |
275 | ||
600184b7 | 276 | /** |
7e9a8c2c | 277 | * batadv_iv_ogm_aggr_packet() - checks if there is another OGM attached |
600184b7 SW |
278 | * @buff_pos: current position in the skb |
279 | * @packet_len: total length of the skb | |
280 | * @tvlv_len: tvlv length of the previously considered OGM | |
281 | * | |
282 | * Return: true if there is enough space for another OGM, false otherwise. | |
283 | */ | |
9fd9b19e MP |
284 | static bool batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len, |
285 | __be16 tvlv_len) | |
fc957275 | 286 | { |
08c36d3e SE |
287 | int next_buff_pos = 0; |
288 | ||
7e071c79 | 289 | next_buff_pos += buff_pos + BATADV_OGM_HLEN; |
ef261577 | 290 | next_buff_pos += ntohs(tvlv_len); |
fc957275 ML |
291 | |
292 | return (next_buff_pos <= packet_len) && | |
42d0b044 | 293 | (next_buff_pos <= BATADV_MAX_AGGREGATION_BYTES); |
fc957275 ML |
294 | } |
295 | ||
b9dacc52 | 296 | /* send a batman ogm to a given interface */ |
56303d34 SE |
297 | static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, |
298 | struct batadv_hard_iface *hard_iface) | |
b9dacc52 | 299 | { |
56303d34 | 300 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
de12baec | 301 | const char *fwd_str; |
6b5e971a SE |
302 | u8 packet_num; |
303 | s16 buff_pos; | |
96412690 | 304 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 305 | struct sk_buff *skb; |
6b5e971a | 306 | u8 *packet_pos; |
b9dacc52 | 307 | |
e9a4f295 | 308 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
b9dacc52 ML |
309 | return; |
310 | ||
311 | packet_num = 0; | |
312 | buff_pos = 0; | |
c67893d1 SE |
313 | packet_pos = forw_packet->skb->data; |
314 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
315 | |
316 | /* adjust all flags and log packets */ | |
fe8bc396 | 317 | while (batadv_iv_ogm_aggr_packet(buff_pos, forw_packet->packet_len, |
ef261577 | 318 | batadv_ogm_packet->tvlv_len)) { |
b9dacc52 | 319 | /* we might have aggregated direct link packets with an |
9cfc7bd6 SE |
320 | * ordinary base packet |
321 | */ | |
8de47de5 SE |
322 | if (forw_packet->direct_link_flags & BIT(packet_num) && |
323 | forw_packet->if_incoming == hard_iface) | |
96412690 | 324 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 325 | else |
96412690 | 326 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 327 | |
c67893d1 SE |
328 | if (packet_num > 0 || !forw_packet->own) |
329 | fwd_str = "Forwarding"; | |
330 | else | |
331 | fwd_str = "Sending own"; | |
332 | ||
39c75a51 | 333 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
e1bf0c14 | 334 | "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s) on interface %s [%pM]\n", |
1eda58bf | 335 | fwd_str, (packet_num > 0 ? "aggregated " : ""), |
96412690 SE |
336 | batadv_ogm_packet->orig, |
337 | ntohl(batadv_ogm_packet->seqno), | |
a40d9b07 | 338 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl, |
a2f2b6cd | 339 | ((batadv_ogm_packet->flags & BATADV_DIRECTLINK) ? |
1eda58bf | 340 | "on" : "off"), |
e1bf0c14 | 341 | hard_iface->net_dev->name, |
1eda58bf | 342 | hard_iface->net_dev->dev_addr); |
b9dacc52 | 343 | |
7e071c79 | 344 | buff_pos += BATADV_OGM_HLEN; |
ef261577 | 345 | buff_pos += ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 346 | packet_num++; |
c67893d1 SE |
347 | packet_pos = forw_packet->skb->data + buff_pos; |
348 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
349 | } |
350 | ||
351 | /* create clone because function is called more than once */ | |
352 | skb = skb_clone(forw_packet->skb, GFP_ATOMIC); | |
f8214865 | 353 | if (skb) { |
d69909d2 SE |
354 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_TX); |
355 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_TX_BYTES, | |
f8214865 | 356 | skb->len + ETH_HLEN); |
95d39278 | 357 | batadv_send_broadcast_skb(skb, hard_iface); |
f8214865 | 358 | } |
b9dacc52 ML |
359 | } |
360 | ||
361 | /* send a batman ogm packet */ | |
56303d34 | 362 | static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) |
b9dacc52 | 363 | { |
b9dacc52 | 364 | struct net_device *soft_iface; |
b9dacc52 ML |
365 | |
366 | if (!forw_packet->if_incoming) { | |
86ceb360 | 367 | pr_err("Error - can't forward packet: incoming iface not specified\n"); |
f55a2e84 | 368 | return; |
b9dacc52 ML |
369 | } |
370 | ||
371 | soft_iface = forw_packet->if_incoming->soft_iface; | |
b9dacc52 | 372 | |
ef0a937f | 373 | if (WARN_ON(!forw_packet->if_outgoing)) |
f55a2e84 | 374 | return; |
b9dacc52 | 375 | |
ef0a937f | 376 | if (WARN_ON(forw_packet->if_outgoing->soft_iface != soft_iface)) |
f55a2e84 | 377 | return; |
b9dacc52 | 378 | |
ef0a937f | 379 | if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) |
f55a2e84 | 380 | return; |
b9dacc52 | 381 | |
ef0a937f SW |
382 | /* only for one specific outgoing interface */ |
383 | batadv_iv_ogm_send_to_if(forw_packet, forw_packet->if_outgoing); | |
b9dacc52 ML |
384 | } |
385 | ||
ef0a937f | 386 | /** |
7e9a8c2c | 387 | * batadv_iv_ogm_can_aggregate() - find out if an OGM can be aggregated on an |
ef0a937f SW |
388 | * existing forward packet |
389 | * @new_bat_ogm_packet: OGM packet to be aggregated | |
390 | * @bat_priv: the bat priv with all the soft interface information | |
391 | * @packet_len: (total) length of the OGM | |
392 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
95298a91 | 393 | * @directlink: true if this is a direct link packet |
ef0a937f SW |
394 | * @if_incoming: interface where the packet was received |
395 | * @if_outgoing: interface for which the retransmission should be considered | |
396 | * @forw_packet: the forwarded packet which should be checked | |
397 | * | |
62fe710f | 398 | * Return: true if new_packet can be aggregated with forw_packet |
ef0a937f | 399 | */ |
fe8bc396 | 400 | static bool |
96412690 | 401 | batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, |
56303d34 | 402 | struct batadv_priv *bat_priv, |
fe8bc396 SE |
403 | int packet_len, unsigned long send_time, |
404 | bool directlink, | |
56303d34 | 405 | const struct batadv_hard_iface *if_incoming, |
ef0a937f | 406 | const struct batadv_hard_iface *if_outgoing, |
56303d34 | 407 | const struct batadv_forw_packet *forw_packet) |
b9dacc52 | 408 | { |
96412690 | 409 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 410 | int aggregated_bytes = forw_packet->packet_len + packet_len; |
56303d34 | 411 | struct batadv_hard_iface *primary_if = NULL; |
b9dacc52 | 412 | bool res = false; |
42d0b044 | 413 | unsigned long aggregation_end_time; |
b9dacc52 | 414 | |
96412690 | 415 | batadv_ogm_packet = (struct batadv_ogm_packet *)forw_packet->skb->data; |
42d0b044 SE |
416 | aggregation_end_time = send_time; |
417 | aggregation_end_time += msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); | |
b9dacc52 | 418 | |
9cfc7bd6 | 419 | /* we can aggregate the current packet to this aggregated packet |
b9dacc52 ML |
420 | * if: |
421 | * | |
422 | * - the send time is within our MAX_AGGREGATION_MS time | |
423 | * - the resulting packet wont be bigger than | |
424 | * MAX_AGGREGATION_BYTES | |
8f34b388 | 425 | * otherwise aggregation is not possible |
b9dacc52 | 426 | */ |
8f34b388 MP |
427 | if (!time_before(send_time, forw_packet->send_time) || |
428 | !time_after_eq(aggregation_end_time, forw_packet->send_time)) | |
429 | return false; | |
430 | ||
431 | if (aggregated_bytes > BATADV_MAX_AGGREGATION_BYTES) | |
432 | return false; | |
433 | ||
434 | /* packet is not leaving on the same interface. */ | |
435 | if (forw_packet->if_outgoing != if_outgoing) | |
436 | return false; | |
437 | ||
438 | /* check aggregation compatibility | |
439 | * -> direct link packets are broadcasted on | |
440 | * their interface only | |
441 | * -> aggregate packet if the current packet is | |
442 | * a "global" packet as well as the base | |
443 | * packet | |
444 | */ | |
445 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
446 | if (!primary_if) | |
447 | return false; | |
ef0a937f | 448 | |
8f34b388 MP |
449 | /* packets without direct link flag and high TTL |
450 | * are flooded through the net | |
451 | */ | |
452 | if (!directlink && | |
453 | !(batadv_ogm_packet->flags & BATADV_DIRECTLINK) && | |
454 | batadv_ogm_packet->ttl != 1 && | |
455 | ||
456 | /* own packets originating non-primary | |
457 | * interfaces leave only that interface | |
458 | */ | |
459 | (!forw_packet->own || | |
460 | forw_packet->if_incoming == primary_if)) { | |
461 | res = true; | |
462 | goto out; | |
463 | } | |
b9dacc52 | 464 | |
8f34b388 MP |
465 | /* if the incoming packet is sent via this one |
466 | * interface only - we still can aggregate | |
467 | */ | |
468 | if (directlink && | |
469 | new_bat_ogm_packet->ttl == 1 && | |
470 | forw_packet->if_incoming == if_incoming && | |
471 | ||
472 | /* packets from direct neighbors or | |
473 | * own secondary interface packets | |
474 | * (= secondary interface packets in general) | |
475 | */ | |
476 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK || | |
477 | (forw_packet->own && | |
478 | forw_packet->if_incoming != primary_if))) { | |
479 | res = true; | |
480 | goto out; | |
b9dacc52 ML |
481 | } |
482 | ||
483 | out: | |
484 | if (primary_if) | |
82047ad7 | 485 | batadv_hardif_put(primary_if); |
b9dacc52 ML |
486 | return res; |
487 | } | |
488 | ||
1b371d13 | 489 | /** |
7e9a8c2c | 490 | * batadv_iv_ogm_aggregate_new() - create a new aggregated packet and add this |
ef0a937f SW |
491 | * packet to it. |
492 | * @packet_buff: pointer to the OGM | |
493 | * @packet_len: (total) length of the OGM | |
494 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
495 | * @direct_link: whether this OGM has direct link status | |
496 | * @if_incoming: interface where the packet was received | |
497 | * @if_outgoing: interface for which the retransmission should be considered | |
498 | * @own_packet: true if it is a self-generated ogm | |
499 | */ | |
fe8bc396 SE |
500 | static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, |
501 | int packet_len, unsigned long send_time, | |
502 | bool direct_link, | |
56303d34 | 503 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 504 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 505 | int own_packet) |
b9dacc52 | 506 | { |
56303d34 SE |
507 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
508 | struct batadv_forw_packet *forw_packet_aggr; | |
99ba18ef | 509 | struct sk_buff *skb; |
b9dacc52 | 510 | unsigned char *skb_buff; |
42d0b044 | 511 | unsigned int skb_size; |
a65e5481 | 512 | atomic_t *queue_left = own_packet ? NULL : &bat_priv->batman_queue_left; |
b9dacc52 | 513 | |
940d156f MP |
514 | if (atomic_read(&bat_priv->aggregated_ogms) && |
515 | packet_len < BATADV_MAX_AGGREGATION_BYTES) | |
5b246574 | 516 | skb_size = BATADV_MAX_AGGREGATION_BYTES; |
b9dacc52 | 517 | else |
5b246574 SE |
518 | skb_size = packet_len; |
519 | ||
41ab6c48 | 520 | skb_size += ETH_HLEN; |
b9dacc52 | 521 | |
99ba18ef LL |
522 | skb = netdev_alloc_skb_ip_align(NULL, skb_size); |
523 | if (!skb) | |
524 | return; | |
525 | ||
526 | forw_packet_aggr = batadv_forw_packet_alloc(if_incoming, if_outgoing, | |
527 | queue_left, bat_priv, skb); | |
528 | if (!forw_packet_aggr) { | |
529 | kfree_skb(skb); | |
a65e5481 LL |
530 | return; |
531 | } | |
532 | ||
c54f38c9 | 533 | forw_packet_aggr->skb->priority = TC_PRIO_CONTROL; |
41ab6c48 | 534 | skb_reserve(forw_packet_aggr->skb, ETH_HLEN); |
b9dacc52 | 535 | |
b9dacc52 ML |
536 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); |
537 | forw_packet_aggr->packet_len = packet_len; | |
538 | memcpy(skb_buff, packet_buff, packet_len); | |
539 | ||
540 | forw_packet_aggr->own = own_packet; | |
42d0b044 | 541 | forw_packet_aggr->direct_link_flags = BATADV_NO_FLAGS; |
b9dacc52 ML |
542 | forw_packet_aggr->send_time = send_time; |
543 | ||
544 | /* save packet direct link flag status */ | |
545 | if (direct_link) | |
546 | forw_packet_aggr->direct_link_flags |= 1; | |
547 | ||
b9dacc52 | 548 | INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work, |
f0d97253 | 549 | batadv_iv_send_outstanding_bat_ogm_packet); |
9b4aec64 LL |
550 | |
551 | batadv_forw_packet_ogmv1_queue(bat_priv, forw_packet_aggr, send_time); | |
b9dacc52 ML |
552 | } |
553 | ||
554 | /* aggregate a new packet into the existing ogm packet */ | |
56303d34 | 555 | static void batadv_iv_ogm_aggregate(struct batadv_forw_packet *forw_packet_aggr, |
fe8bc396 SE |
556 | const unsigned char *packet_buff, |
557 | int packet_len, bool direct_link) | |
b9dacc52 | 558 | { |
8de47de5 | 559 | unsigned long new_direct_link_flag; |
b9dacc52 | 560 | |
e04de486 | 561 | skb_put_data(forw_packet_aggr->skb, packet_buff, packet_len); |
b9dacc52 ML |
562 | forw_packet_aggr->packet_len += packet_len; |
563 | forw_packet_aggr->num_packets++; | |
564 | ||
565 | /* save packet direct link flag status */ | |
8de47de5 SE |
566 | if (direct_link) { |
567 | new_direct_link_flag = BIT(forw_packet_aggr->num_packets); | |
568 | forw_packet_aggr->direct_link_flags |= new_direct_link_flag; | |
569 | } | |
b9dacc52 ML |
570 | } |
571 | ||
ef0a937f | 572 | /** |
7e9a8c2c | 573 | * batadv_iv_ogm_queue_add() - queue up an OGM for transmission |
ef0a937f SW |
574 | * @bat_priv: the bat priv with all the soft interface information |
575 | * @packet_buff: pointer to the OGM | |
576 | * @packet_len: (total) length of the OGM | |
577 | * @if_incoming: interface where the packet was received | |
578 | * @if_outgoing: interface for which the retransmission should be considered | |
579 | * @own_packet: true if it is a self-generated ogm | |
580 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
581 | */ | |
56303d34 | 582 | static void batadv_iv_ogm_queue_add(struct batadv_priv *bat_priv, |
fe8bc396 SE |
583 | unsigned char *packet_buff, |
584 | int packet_len, | |
56303d34 | 585 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 586 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 587 | int own_packet, unsigned long send_time) |
b9dacc52 | 588 | { |
9cfc7bd6 | 589 | /* _aggr -> pointer to the packet we want to aggregate with |
b9dacc52 ML |
590 | * _pos -> pointer to the position in the queue |
591 | */ | |
56303d34 SE |
592 | struct batadv_forw_packet *forw_packet_aggr = NULL; |
593 | struct batadv_forw_packet *forw_packet_pos = NULL; | |
96412690 | 594 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 595 | bool direct_link; |
42d0b044 | 596 | unsigned long max_aggregation_jiffies; |
b9dacc52 | 597 | |
96412690 | 598 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
56489151 | 599 | direct_link = !!(batadv_ogm_packet->flags & BATADV_DIRECTLINK); |
42d0b044 | 600 | max_aggregation_jiffies = msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); |
b9dacc52 ML |
601 | |
602 | /* find position for the packet in the forward queue */ | |
603 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
604 | /* own packets are not to be aggregated */ | |
56489151 | 605 | if (atomic_read(&bat_priv->aggregated_ogms) && !own_packet) { |
b67bfe0d | 606 | hlist_for_each_entry(forw_packet_pos, |
b9dacc52 | 607 | &bat_priv->forw_bat_list, list) { |
96412690 | 608 | if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet, |
fe8bc396 SE |
609 | bat_priv, packet_len, |
610 | send_time, direct_link, | |
611 | if_incoming, | |
ef0a937f | 612 | if_outgoing, |
fe8bc396 | 613 | forw_packet_pos)) { |
b9dacc52 ML |
614 | forw_packet_aggr = forw_packet_pos; |
615 | break; | |
616 | } | |
617 | } | |
618 | } | |
619 | ||
620 | /* nothing to aggregate with - either aggregation disabled or no | |
9cfc7bd6 SE |
621 | * suitable aggregation packet found |
622 | */ | |
b9dacc52 ML |
623 | if (!forw_packet_aggr) { |
624 | /* the following section can run without the lock */ | |
625 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
626 | ||
9cfc7bd6 | 627 | /* if we could not aggregate this packet with one of the others |
b9dacc52 ML |
628 | * we hold it back for a while, so that it might be aggregated |
629 | * later on | |
630 | */ | |
42d0b044 SE |
631 | if (!own_packet && atomic_read(&bat_priv->aggregated_ogms)) |
632 | send_time += max_aggregation_jiffies; | |
b9dacc52 | 633 | |
fe8bc396 SE |
634 | batadv_iv_ogm_aggregate_new(packet_buff, packet_len, |
635 | send_time, direct_link, | |
ef0a937f SW |
636 | if_incoming, if_outgoing, |
637 | own_packet); | |
b9dacc52 | 638 | } else { |
fe8bc396 SE |
639 | batadv_iv_ogm_aggregate(forw_packet_aggr, packet_buff, |
640 | packet_len, direct_link); | |
b9dacc52 ML |
641 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
642 | } | |
643 | } | |
644 | ||
56303d34 | 645 | static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, |
fe8bc396 | 646 | const struct ethhdr *ethhdr, |
96412690 | 647 | struct batadv_ogm_packet *batadv_ogm_packet, |
fe8bc396 SE |
648 | bool is_single_hop_neigh, |
649 | bool is_from_best_next_hop, | |
ef0a937f SW |
650 | struct batadv_hard_iface *if_incoming, |
651 | struct batadv_hard_iface *if_outgoing) | |
b9dacc52 | 652 | { |
56303d34 | 653 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
6b5e971a | 654 | u16 tvlv_len; |
b9dacc52 | 655 | |
a40d9b07 | 656 | if (batadv_ogm_packet->ttl <= 1) { |
39c75a51 | 657 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n"); |
b9dacc52 ML |
658 | return; |
659 | } | |
660 | ||
13b2541b ML |
661 | if (!is_from_best_next_hop) { |
662 | /* Mark the forwarded packet when it is not coming from our | |
663 | * best next hop. We still need to forward the packet for our | |
664 | * neighbor link quality detection to work in case the packet | |
665 | * originated from a single hop neighbor. Otherwise we can | |
666 | * simply drop the ogm. | |
667 | */ | |
668 | if (is_single_hop_neigh) | |
96412690 | 669 | batadv_ogm_packet->flags |= BATADV_NOT_BEST_NEXT_HOP; |
13b2541b ML |
670 | else |
671 | return; | |
672 | } | |
b9dacc52 | 673 | |
ef261577 | 674 | tvlv_len = ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 675 | |
a40d9b07 | 676 | batadv_ogm_packet->ttl--; |
8fdd0153 | 677 | ether_addr_copy(batadv_ogm_packet->prev_sender, ethhdr->h_source); |
b9dacc52 | 678 | |
b9dacc52 | 679 | /* apply hop penalty */ |
96412690 | 680 | batadv_ogm_packet->tq = batadv_hop_penalty(batadv_ogm_packet->tq, |
fe8bc396 | 681 | bat_priv); |
b9dacc52 | 682 | |
39c75a51 | 683 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 684 | "Forwarding packet: tq: %i, ttl: %i\n", |
a40d9b07 | 685 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl); |
b9dacc52 | 686 | |
75cd33f8 | 687 | if (is_single_hop_neigh) |
96412690 | 688 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 689 | else |
96412690 | 690 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 691 | |
96412690 | 692 | batadv_iv_ogm_queue_add(bat_priv, (unsigned char *)batadv_ogm_packet, |
ef261577 | 693 | BATADV_OGM_HLEN + tvlv_len, |
ef0a937f SW |
694 | if_incoming, if_outgoing, 0, |
695 | batadv_iv_ogm_fwd_send_time()); | |
b9dacc52 ML |
696 | } |
697 | ||
d9896617 | 698 | /** |
7e9a8c2c SE |
699 | * batadv_iv_ogm_slide_own_bcast_window() - bitshift own OGM broadcast windows |
700 | * for the given interface | |
d9896617 AQ |
701 | * @hard_iface: the interface for which the windows have to be shifted |
702 | */ | |
703 | static void | |
704 | batadv_iv_ogm_slide_own_bcast_window(struct batadv_hard_iface *hard_iface) | |
705 | { | |
706 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); | |
707 | struct batadv_hashtable *hash = bat_priv->orig_hash; | |
708 | struct hlist_head *head; | |
709 | struct batadv_orig_node *orig_node; | |
dee222c7 | 710 | struct batadv_orig_ifinfo *orig_ifinfo; |
d9896617 | 711 | unsigned long *word; |
6b5e971a | 712 | u32 i; |
6b5e971a | 713 | u8 *w; |
d9896617 AQ |
714 | |
715 | for (i = 0; i < hash->size; i++) { | |
716 | head = &hash->table[i]; | |
717 | ||
718 | rcu_read_lock(); | |
719 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
dee222c7 SE |
720 | hlist_for_each_entry_rcu(orig_ifinfo, |
721 | &orig_node->ifinfo_list, | |
722 | list) { | |
723 | if (orig_ifinfo->if_outgoing != hard_iface) | |
724 | continue; | |
725 | ||
726 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
727 | word = orig_ifinfo->bat_iv.bcast_own; | |
728 | batadv_bit_get_packet(bat_priv, word, 1, 0); | |
729 | w = &orig_ifinfo->bat_iv.bcast_own_sum; | |
730 | *w = bitmap_weight(word, | |
731 | BATADV_TQ_LOCAL_WINDOW_SIZE); | |
732 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
733 | } | |
d9896617 AQ |
734 | } |
735 | rcu_read_unlock(); | |
736 | } | |
737 | } | |
738 | ||
56303d34 | 739 | static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) |
b9dacc52 | 740 | { |
56303d34 | 741 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
14511519 | 742 | unsigned char **ogm_buff = &hard_iface->bat_iv.ogm_buff; |
96412690 | 743 | struct batadv_ogm_packet *batadv_ogm_packet; |
ef0a937f | 744 | struct batadv_hard_iface *primary_if, *tmp_hard_iface; |
14511519 | 745 | int *ogm_buff_len = &hard_iface->bat_iv.ogm_buff_len; |
6b5e971a SE |
746 | u32 seqno; |
747 | u16 tvlv_len = 0; | |
ef0a937f | 748 | unsigned long send_time; |
b9dacc52 | 749 | |
825ffe1f SE |
750 | if (hard_iface->if_status == BATADV_IF_NOT_IN_USE || |
751 | hard_iface->if_status == BATADV_IF_TO_BE_REMOVED) | |
f0d97253 AQ |
752 | return; |
753 | ||
754 | /* the interface gets activated here to avoid race conditions between | |
755 | * the moment of activating the interface in | |
756 | * hardif_activate_interface() where the originator mac is set and | |
757 | * outdated packets (especially uninitialized mac addresses) in the | |
758 | * packet queue | |
759 | */ | |
760 | if (hard_iface->if_status == BATADV_IF_TO_BE_ACTIVATED) | |
761 | hard_iface->if_status = BATADV_IF_ACTIVE; | |
762 | ||
e5d89254 | 763 | primary_if = batadv_primary_if_get_selected(bat_priv); |
b9dacc52 | 764 | |
e1bf0c14 ML |
765 | if (hard_iface == primary_if) { |
766 | /* tt changes have to be committed before the tvlv data is | |
767 | * appended as it may alter the tt tvlv container | |
768 | */ | |
769 | batadv_tt_local_commit_changes(bat_priv); | |
ef261577 ML |
770 | tvlv_len = batadv_tvlv_container_ogm_append(bat_priv, ogm_buff, |
771 | ogm_buff_len, | |
772 | BATADV_OGM_HLEN); | |
e1bf0c14 | 773 | } |
be9aa4c1 | 774 | |
14511519 | 775 | batadv_ogm_packet = (struct batadv_ogm_packet *)(*ogm_buff); |
ef261577 | 776 | batadv_ogm_packet->tvlv_len = htons(tvlv_len); |
b9dacc52 ML |
777 | |
778 | /* change sequence number to network order */ | |
6b5e971a | 779 | seqno = (u32)atomic_read(&hard_iface->bat_iv.ogm_seqno); |
bbb1f90e | 780 | batadv_ogm_packet->seqno = htonl(seqno); |
14511519 | 781 | atomic_inc(&hard_iface->bat_iv.ogm_seqno); |
b9dacc52 | 782 | |
d9896617 | 783 | batadv_iv_ogm_slide_own_bcast_window(hard_iface); |
b9dacc52 | 784 | |
ef0a937f SW |
785 | send_time = batadv_iv_ogm_emit_send_time(bat_priv); |
786 | ||
787 | if (hard_iface != primary_if) { | |
788 | /* OGMs from secondary interfaces are only scheduled on their | |
789 | * respective interfaces. | |
790 | */ | |
791 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, *ogm_buff_len, | |
792 | hard_iface, hard_iface, 1, send_time); | |
793 | goto out; | |
794 | } | |
795 | ||
796 | /* OGMs from primary interfaces are scheduled on all | |
797 | * interfaces. | |
798 | */ | |
799 | rcu_read_lock(); | |
800 | list_for_each_entry_rcu(tmp_hard_iface, &batadv_hardif_list, list) { | |
801 | if (tmp_hard_iface->soft_iface != hard_iface->soft_iface) | |
87b40f53 | 802 | continue; |
27353446 SE |
803 | |
804 | if (!kref_get_unless_zero(&tmp_hard_iface->refcount)) | |
805 | continue; | |
806 | ||
ef0a937f SW |
807 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, |
808 | *ogm_buff_len, hard_iface, | |
809 | tmp_hard_iface, 1, send_time); | |
27353446 SE |
810 | |
811 | batadv_hardif_put(tmp_hard_iface); | |
ef0a937f SW |
812 | } |
813 | rcu_read_unlock(); | |
814 | ||
815 | out: | |
b9dacc52 | 816 | if (primary_if) |
82047ad7 | 817 | batadv_hardif_put(primary_if); |
b9dacc52 ML |
818 | } |
819 | ||
dee222c7 SE |
820 | /** |
821 | * batadv_iv_orig_ifinfo_sum() - Get bcast_own sum for originator over iterface | |
822 | * @orig_node: originator which reproadcasted the OGMs directly | |
823 | * @if_outgoing: interface which transmitted the original OGM and received the | |
824 | * direct rebroadcast | |
825 | * | |
826 | * Return: Number of replied (rebroadcasted) OGMs which were transmitted by | |
827 | * an originator and directly (without intermediate hop) received by a specific | |
828 | * interface | |
829 | */ | |
830 | static u8 batadv_iv_orig_ifinfo_sum(struct batadv_orig_node *orig_node, | |
831 | struct batadv_hard_iface *if_outgoing) | |
832 | { | |
833 | struct batadv_orig_ifinfo *orig_ifinfo; | |
834 | u8 sum; | |
835 | ||
836 | orig_ifinfo = batadv_orig_ifinfo_get(orig_node, if_outgoing); | |
837 | if (!orig_ifinfo) | |
838 | return 0; | |
839 | ||
840 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
841 | sum = orig_ifinfo->bat_iv.bcast_own_sum; | |
842 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
843 | ||
844 | batadv_orig_ifinfo_put(orig_ifinfo); | |
845 | ||
846 | return sum; | |
847 | } | |
848 | ||
89652331 | 849 | /** |
7e9a8c2c | 850 | * batadv_iv_ogm_orig_update() - use OGM to update corresponding data in an |
89652331 SW |
851 | * originator |
852 | * @bat_priv: the bat priv with all the soft interface information | |
853 | * @orig_node: the orig node who originally emitted the ogm packet | |
7351a482 | 854 | * @orig_ifinfo: ifinfo for the outgoing interface of the orig_node |
89652331 SW |
855 | * @ethhdr: Ethernet header of the OGM |
856 | * @batadv_ogm_packet: the ogm packet | |
857 | * @if_incoming: interface where the packet was received | |
858 | * @if_outgoing: interface for which the retransmission should be considered | |
89652331 SW |
859 | * @dup_status: the duplicate status of this ogm packet. |
860 | */ | |
fe8bc396 | 861 | static void |
56303d34 SE |
862 | batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, |
863 | struct batadv_orig_node *orig_node, | |
7351a482 | 864 | struct batadv_orig_ifinfo *orig_ifinfo, |
fe8bc396 | 865 | const struct ethhdr *ethhdr, |
96412690 | 866 | const struct batadv_ogm_packet *batadv_ogm_packet, |
56303d34 | 867 | struct batadv_hard_iface *if_incoming, |
89652331 | 868 | struct batadv_hard_iface *if_outgoing, |
7c24bbbe | 869 | enum batadv_dup_status dup_status) |
fc957275 | 870 | { |
89652331 SW |
871 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL; |
872 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; | |
4f248cff SE |
873 | struct batadv_neigh_node *neigh_node = NULL; |
874 | struct batadv_neigh_node *tmp_neigh_node = NULL; | |
56303d34 | 875 | struct batadv_neigh_node *router = NULL; |
6b5e971a SE |
876 | u8 sum_orig, sum_neigh; |
877 | u8 *neigh_addr; | |
878 | u8 tq_avg; | |
fc957275 | 879 | |
39c75a51 | 880 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
22f0502e SE |
881 | "%s(): Searching and updating originator entry of received packet\n", |
882 | __func__); | |
fc957275 ML |
883 | |
884 | rcu_read_lock(); | |
b67bfe0d | 885 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 886 | &orig_node->neigh_list, list) { |
1eda58bf SE |
887 | neigh_addr = tmp_neigh_node->addr; |
888 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && | |
889 | tmp_neigh_node->if_incoming == if_incoming && | |
77ae32e8 | 890 | kref_get_unless_zero(&tmp_neigh_node->refcount)) { |
38dc40ef | 891 | if (WARN(neigh_node, "too many matching neigh_nodes")) |
25bb2509 | 892 | batadv_neigh_node_put(neigh_node); |
fc957275 ML |
893 | neigh_node = tmp_neigh_node; |
894 | continue; | |
895 | } | |
896 | ||
7c24bbbe | 897 | if (dup_status != BATADV_NO_DUP) |
fc957275 ML |
898 | continue; |
899 | ||
89652331 SW |
900 | /* only update the entry for this outgoing interface */ |
901 | neigh_ifinfo = batadv_neigh_ifinfo_get(tmp_neigh_node, | |
902 | if_outgoing); | |
903 | if (!neigh_ifinfo) | |
904 | continue; | |
905 | ||
906 | spin_lock_bh(&tmp_neigh_node->ifinfo_lock); | |
907 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
908 | &neigh_ifinfo->bat_iv.tq_index, 0); | |
909 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); | |
910 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
911 | spin_unlock_bh(&tmp_neigh_node->ifinfo_lock); | |
912 | ||
044fa3ae | 913 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 | 914 | neigh_ifinfo = NULL; |
fc957275 ML |
915 | } |
916 | ||
917 | if (!neigh_node) { | |
56303d34 | 918 | struct batadv_orig_node *orig_tmp; |
fc957275 | 919 | |
bbad0a5e | 920 | orig_tmp = batadv_iv_ogm_orig_get(bat_priv, ethhdr->h_source); |
fc957275 ML |
921 | if (!orig_tmp) |
922 | goto unlock; | |
923 | ||
fe8bc396 SE |
924 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
925 | ethhdr->h_source, | |
863dd7a8 | 926 | orig_node, orig_tmp); |
fc957275 | 927 | |
5d967310 | 928 | batadv_orig_node_put(orig_tmp); |
fc957275 ML |
929 | if (!neigh_node) |
930 | goto unlock; | |
23badd6d | 931 | } else { |
39c75a51 | 932 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 933 | "Updating existing last-hop neighbor of originator\n"); |
23badd6d | 934 | } |
fc957275 ML |
935 | |
936 | rcu_read_unlock(); | |
89652331 SW |
937 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
938 | if (!neigh_ifinfo) | |
939 | goto out; | |
fc957275 | 940 | |
d7b2a97e | 941 | neigh_node->last_seen = jiffies; |
fc957275 | 942 | |
89652331 SW |
943 | spin_lock_bh(&neigh_node->ifinfo_lock); |
944 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
945 | &neigh_ifinfo->bat_iv.tq_index, | |
96412690 | 946 | batadv_ogm_packet->tq); |
89652331 SW |
947 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); |
948 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
949 | spin_unlock_bh(&neigh_node->ifinfo_lock); | |
fc957275 | 950 | |
7c24bbbe | 951 | if (dup_status == BATADV_NO_DUP) { |
7351a482 | 952 | orig_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
89652331 | 953 | neigh_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
fc957275 ML |
954 | } |
955 | ||
fc957275 | 956 | /* if this neighbor already is our next hop there is nothing |
9cfc7bd6 SE |
957 | * to change |
958 | */ | |
7351a482 | 959 | router = batadv_orig_router_get(orig_node, if_outgoing); |
fc957275 | 960 | if (router == neigh_node) |
e1bf0c14 | 961 | goto out; |
fc957275 | 962 | |
89652331 SW |
963 | if (router) { |
964 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
965 | if (!router_ifinfo) | |
966 | goto out; | |
967 | ||
968 | /* if this neighbor does not offer a better TQ we won't | |
969 | * consider it | |
970 | */ | |
971 | if (router_ifinfo->bat_iv.tq_avg > neigh_ifinfo->bat_iv.tq_avg) | |
972 | goto out; | |
973 | } | |
fc957275 ML |
974 | |
975 | /* if the TQ is the same and the link not more symmetric we | |
9cfc7bd6 SE |
976 | * won't consider it either |
977 | */ | |
89652331 | 978 | if (router_ifinfo && |
01b97a3e | 979 | neigh_ifinfo->bat_iv.tq_avg == router_ifinfo->bat_iv.tq_avg) { |
dee222c7 SE |
980 | sum_orig = batadv_iv_orig_ifinfo_sum(router->orig_node, |
981 | router->if_incoming); | |
982 | sum_neigh = batadv_iv_orig_ifinfo_sum(neigh_node->orig_node, | |
983 | neigh_node->if_incoming); | |
bbb1f90e | 984 | if (sum_orig >= sum_neigh) |
e1bf0c14 | 985 | goto out; |
fc957275 ML |
986 | } |
987 | ||
7351a482 | 988 | batadv_update_route(bat_priv, orig_node, if_outgoing, neigh_node); |
fc957275 ML |
989 | goto out; |
990 | ||
991 | unlock: | |
992 | rcu_read_unlock(); | |
993 | out: | |
994 | if (neigh_node) | |
25bb2509 | 995 | batadv_neigh_node_put(neigh_node); |
fc957275 | 996 | if (router) |
25bb2509 | 997 | batadv_neigh_node_put(router); |
89652331 | 998 | if (neigh_ifinfo) |
044fa3ae | 999 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 | 1000 | if (router_ifinfo) |
044fa3ae | 1001 | batadv_neigh_ifinfo_put(router_ifinfo); |
fc957275 ML |
1002 | } |
1003 | ||
89652331 | 1004 | /** |
7e9a8c2c | 1005 | * batadv_iv_ogm_calc_tq() - calculate tq for current received ogm packet |
89652331 SW |
1006 | * @orig_node: the orig node who originally emitted the ogm packet |
1007 | * @orig_neigh_node: the orig node struct of the neighbor who sent the packet | |
1008 | * @batadv_ogm_packet: the ogm packet | |
1009 | * @if_incoming: interface where the packet was received | |
1010 | * @if_outgoing: interface for which the retransmission should be considered | |
1011 | * | |
4b426b10 | 1012 | * Return: true if the link can be considered bidirectional, false otherwise |
89652331 | 1013 | */ |
4b426b10 SE |
1014 | static bool batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, |
1015 | struct batadv_orig_node *orig_neigh_node, | |
1016 | struct batadv_ogm_packet *batadv_ogm_packet, | |
1017 | struct batadv_hard_iface *if_incoming, | |
1018 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1019 | { |
56303d34 SE |
1020 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1021 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node; | |
89652331 | 1022 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
6b5e971a SE |
1023 | u8 total_count; |
1024 | u8 orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own; | |
42d0b044 | 1025 | unsigned int neigh_rq_inv_cube, neigh_rq_max_cube; |
d285f52c | 1026 | unsigned int tq_asym_penalty, inv_asym_penalty; |
42d0b044 | 1027 | unsigned int combined_tq; |
d285f52c | 1028 | unsigned int tq_iface_penalty; |
4b426b10 | 1029 | bool ret = false; |
fc957275 ML |
1030 | |
1031 | /* find corresponding one hop neighbor */ | |
1032 | rcu_read_lock(); | |
b67bfe0d | 1033 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 1034 | &orig_neigh_node->neigh_list, list) { |
1eda58bf SE |
1035 | if (!batadv_compare_eth(tmp_neigh_node->addr, |
1036 | orig_neigh_node->orig)) | |
fc957275 ML |
1037 | continue; |
1038 | ||
1039 | if (tmp_neigh_node->if_incoming != if_incoming) | |
1040 | continue; | |
1041 | ||
77ae32e8 | 1042 | if (!kref_get_unless_zero(&tmp_neigh_node->refcount)) |
fc957275 ML |
1043 | continue; |
1044 | ||
1045 | neigh_node = tmp_neigh_node; | |
1046 | break; | |
1047 | } | |
1048 | rcu_read_unlock(); | |
1049 | ||
1050 | if (!neigh_node) | |
fe8bc396 SE |
1051 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
1052 | orig_neigh_node->orig, | |
1053 | orig_neigh_node, | |
863dd7a8 | 1054 | orig_neigh_node); |
fc957275 ML |
1055 | |
1056 | if (!neigh_node) | |
1057 | goto out; | |
1058 | ||
d7b2a97e | 1059 | /* if orig_node is direct neighbor update neigh_node last_seen */ |
fc957275 | 1060 | if (orig_node == orig_neigh_node) |
d7b2a97e | 1061 | neigh_node->last_seen = jiffies; |
fc957275 | 1062 | |
d7b2a97e | 1063 | orig_node->last_seen = jiffies; |
fc957275 ML |
1064 | |
1065 | /* find packet count of corresponding one hop neighbor */ | |
dee222c7 | 1066 | orig_eq_count = batadv_iv_orig_ifinfo_sum(orig_neigh_node, if_incoming); |
89652331 SW |
1067 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
1068 | if (neigh_ifinfo) { | |
1069 | neigh_rq_count = neigh_ifinfo->bat_iv.real_packet_count; | |
044fa3ae | 1070 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 SW |
1071 | } else { |
1072 | neigh_rq_count = 0; | |
1073 | } | |
fc957275 ML |
1074 | |
1075 | /* pay attention to not get a value bigger than 100 % */ | |
c67893d1 SE |
1076 | if (orig_eq_count > neigh_rq_count) |
1077 | total_count = neigh_rq_count; | |
1078 | else | |
1079 | total_count = orig_eq_count; | |
fc957275 | 1080 | |
9cfc7bd6 SE |
1081 | /* if we have too few packets (too less data) we set tq_own to zero |
1082 | * if we receive too few packets it is not considered bidirectional | |
1083 | */ | |
42d0b044 SE |
1084 | if (total_count < BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM || |
1085 | neigh_rq_count < BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM) | |
fc957275 ML |
1086 | tq_own = 0; |
1087 | else | |
1088 | /* neigh_node->real_packet_count is never zero as we | |
1089 | * only purge old information when getting new | |
9cfc7bd6 SE |
1090 | * information |
1091 | */ | |
42d0b044 | 1092 | tq_own = (BATADV_TQ_MAX_VALUE * total_count) / neigh_rq_count; |
fc957275 | 1093 | |
21a1236b | 1094 | /* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does |
fc957275 ML |
1095 | * affect the nearly-symmetric links only a little, but |
1096 | * punishes asymmetric links more. This will give a value | |
1097 | * between 0 and TQ_MAX_VALUE | |
1098 | */ | |
42d0b044 SE |
1099 | neigh_rq_inv = BATADV_TQ_LOCAL_WINDOW_SIZE - neigh_rq_count; |
1100 | neigh_rq_inv_cube = neigh_rq_inv * neigh_rq_inv * neigh_rq_inv; | |
1101 | neigh_rq_max_cube = BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1102 | BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1103 | BATADV_TQ_LOCAL_WINDOW_SIZE; | |
1104 | inv_asym_penalty = BATADV_TQ_MAX_VALUE * neigh_rq_inv_cube; | |
1105 | inv_asym_penalty /= neigh_rq_max_cube; | |
1106 | tq_asym_penalty = BATADV_TQ_MAX_VALUE - inv_asym_penalty; | |
1107 | ||
c0398768 SW |
1108 | /* penalize if the OGM is forwarded on the same interface. WiFi |
1109 | * interfaces and other half duplex devices suffer from throughput | |
1110 | * drops as they can't send and receive at the same time. | |
1111 | */ | |
1112 | tq_iface_penalty = BATADV_TQ_MAX_VALUE; | |
825ffe1f | 1113 | if (if_outgoing && if_incoming == if_outgoing && |
10b1bbb4 | 1114 | batadv_is_wifi_hardif(if_outgoing)) |
c0398768 SW |
1115 | tq_iface_penalty = batadv_hop_penalty(BATADV_TQ_MAX_VALUE, |
1116 | bat_priv); | |
1117 | ||
1118 | combined_tq = batadv_ogm_packet->tq * | |
1119 | tq_own * | |
1120 | tq_asym_penalty * | |
1121 | tq_iface_penalty; | |
1122 | combined_tq /= BATADV_TQ_MAX_VALUE * | |
1123 | BATADV_TQ_MAX_VALUE * | |
1124 | BATADV_TQ_MAX_VALUE; | |
96412690 | 1125 | batadv_ogm_packet->tq = combined_tq; |
fc957275 | 1126 | |
39c75a51 | 1127 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
6a04be8d | 1128 | "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 | 1129 | orig_node->orig, orig_neigh_node->orig, total_count, |
c0398768 SW |
1130 | neigh_rq_count, tq_own, tq_asym_penalty, tq_iface_penalty, |
1131 | batadv_ogm_packet->tq, if_incoming->net_dev->name, | |
1132 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT"); | |
fc957275 ML |
1133 | |
1134 | /* if link has the minimum required transmission quality | |
9cfc7bd6 SE |
1135 | * consider it bidirectional |
1136 | */ | |
96412690 | 1137 | if (batadv_ogm_packet->tq >= BATADV_TQ_TOTAL_BIDRECT_LIMIT) |
4b426b10 | 1138 | ret = true; |
fc957275 ML |
1139 | |
1140 | out: | |
1141 | if (neigh_node) | |
25bb2509 | 1142 | batadv_neigh_node_put(neigh_node); |
fc957275 ML |
1143 | return ret; |
1144 | } | |
1145 | ||
7c24bbbe | 1146 | /** |
7e9a8c2c | 1147 | * batadv_iv_ogm_update_seqnos() - process a batman packet for all interfaces, |
7c24bbbe SW |
1148 | * adjust the sequence number and find out whether it is a duplicate |
1149 | * @ethhdr: ethernet header of the packet | |
1150 | * @batadv_ogm_packet: OGM packet to be considered | |
1151 | * @if_incoming: interface on which the OGM packet was received | |
89652331 | 1152 | * @if_outgoing: interface for which the retransmission should be considered |
7c24bbbe | 1153 | * |
62fe710f | 1154 | * Return: duplicate status as enum batadv_dup_status |
fc957275 | 1155 | */ |
7c24bbbe | 1156 | static enum batadv_dup_status |
fe8bc396 | 1157 | batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, |
96412690 | 1158 | const struct batadv_ogm_packet *batadv_ogm_packet, |
89652331 SW |
1159 | const struct batadv_hard_iface *if_incoming, |
1160 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1161 | { |
56303d34 SE |
1162 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1163 | struct batadv_orig_node *orig_node; | |
7351a482 | 1164 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; |
89652331 SW |
1165 | struct batadv_neigh_node *neigh_node; |
1166 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
4b426b10 | 1167 | bool is_dup; |
6b5e971a | 1168 | s32 seq_diff; |
4b426b10 | 1169 | bool need_update = false; |
7c24bbbe SW |
1170 | int set_mark; |
1171 | enum batadv_dup_status ret = BATADV_NO_DUP; | |
6b5e971a SE |
1172 | u32 seqno = ntohl(batadv_ogm_packet->seqno); |
1173 | u8 *neigh_addr; | |
1174 | u8 packet_count; | |
0538f759 | 1175 | unsigned long *bitmap; |
fc957275 | 1176 | |
bbad0a5e | 1177 | orig_node = batadv_iv_ogm_orig_get(bat_priv, batadv_ogm_packet->orig); |
fc957275 | 1178 | if (!orig_node) |
7c24bbbe | 1179 | return BATADV_NO_DUP; |
fc957275 | 1180 | |
7351a482 SW |
1181 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1182 | if (WARN_ON(!orig_ifinfo)) { | |
5d967310 | 1183 | batadv_orig_node_put(orig_node); |
7351a482 SW |
1184 | return 0; |
1185 | } | |
1186 | ||
bbad0a5e | 1187 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
7351a482 | 1188 | seq_diff = seqno - orig_ifinfo->last_real_seqno; |
fc957275 ML |
1189 | |
1190 | /* signalize caller that the packet is to be dropped. */ | |
1e5cc266 | 1191 | if (!hlist_empty(&orig_node->neigh_list) && |
30d3c511 | 1192 | batadv_window_protected(bat_priv, seq_diff, |
81f02683 SW |
1193 | BATADV_TQ_LOCAL_WINDOW_SIZE, |
1194 | &orig_ifinfo->batman_seqno_reset, NULL)) { | |
7c24bbbe | 1195 | ret = BATADV_PROTECTED; |
fc957275 | 1196 | goto out; |
7c24bbbe | 1197 | } |
fc957275 ML |
1198 | |
1199 | rcu_read_lock(); | |
89652331 SW |
1200 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { |
1201 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, | |
1202 | if_outgoing); | |
1203 | if (!neigh_ifinfo) | |
1204 | continue; | |
1205 | ||
1206 | neigh_addr = neigh_node->addr; | |
1207 | is_dup = batadv_test_bit(neigh_ifinfo->bat_iv.real_bits, | |
7351a482 | 1208 | orig_ifinfo->last_real_seqno, |
7c24bbbe SW |
1209 | seqno); |
1210 | ||
1eda58bf | 1211 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && |
89652331 | 1212 | neigh_node->if_incoming == if_incoming) { |
fc957275 | 1213 | set_mark = 1; |
7c24bbbe SW |
1214 | if (is_dup) |
1215 | ret = BATADV_NEIGH_DUP; | |
1216 | } else { | |
fc957275 | 1217 | set_mark = 0; |
825ffe1f | 1218 | if (is_dup && ret != BATADV_NEIGH_DUP) |
7c24bbbe SW |
1219 | ret = BATADV_ORIG_DUP; |
1220 | } | |
fc957275 ML |
1221 | |
1222 | /* if the window moved, set the update flag. */ | |
89652331 | 1223 | bitmap = neigh_ifinfo->bat_iv.real_bits; |
0538f759 | 1224 | need_update |= batadv_bit_get_packet(bat_priv, bitmap, |
0f5f9322 | 1225 | seq_diff, set_mark); |
fc957275 | 1226 | |
89652331 | 1227 | packet_count = bitmap_weight(bitmap, |
bbb1f90e | 1228 | BATADV_TQ_LOCAL_WINDOW_SIZE); |
89652331 | 1229 | neigh_ifinfo->bat_iv.real_packet_count = packet_count; |
044fa3ae | 1230 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
fc957275 ML |
1231 | } |
1232 | rcu_read_unlock(); | |
1233 | ||
1234 | if (need_update) { | |
39c75a51 | 1235 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
7351a482 SW |
1236 | "%s updating last_seqno: old %u, new %u\n", |
1237 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT", | |
1238 | orig_ifinfo->last_real_seqno, seqno); | |
1239 | orig_ifinfo->last_real_seqno = seqno; | |
fc957275 ML |
1240 | } |
1241 | ||
fc957275 | 1242 | out: |
bbad0a5e | 1243 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
5d967310 | 1244 | batadv_orig_node_put(orig_node); |
35f94779 | 1245 | batadv_orig_ifinfo_put(orig_ifinfo); |
fc957275 ML |
1246 | return ret; |
1247 | } | |
1248 | ||
7351a482 | 1249 | /** |
7e9a8c2c SE |
1250 | * batadv_iv_ogm_process_per_outif() - process a batman iv OGM for an outgoing |
1251 | * interface | |
7351a482 | 1252 | * @skb: the skb containing the OGM |
95298a91 | 1253 | * @ogm_offset: offset from skb->data to start of ogm header |
7351a482 SW |
1254 | * @orig_node: the (cached) orig node for the originator of this OGM |
1255 | * @if_incoming: the interface where this packet was received | |
1256 | * @if_outgoing: the interface for which the packet should be considered | |
1257 | */ | |
1258 | static void | |
1259 | batadv_iv_ogm_process_per_outif(const struct sk_buff *skb, int ogm_offset, | |
1260 | struct batadv_orig_node *orig_node, | |
1261 | struct batadv_hard_iface *if_incoming, | |
1262 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1263 | { |
56303d34 | 1264 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
4ff1e2a7 | 1265 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
4f248cff SE |
1266 | struct batadv_neigh_node *router = NULL; |
1267 | struct batadv_neigh_node *router_router = NULL; | |
7351a482 SW |
1268 | struct batadv_orig_node *orig_neigh_node; |
1269 | struct batadv_orig_ifinfo *orig_ifinfo; | |
56303d34 | 1270 | struct batadv_neigh_node *orig_neigh_router = NULL; |
89652331 | 1271 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; |
7351a482 | 1272 | struct batadv_ogm_packet *ogm_packet; |
7c24bbbe | 1273 | enum batadv_dup_status dup_status; |
7351a482 SW |
1274 | bool is_from_best_next_hop = false; |
1275 | bool is_single_hop_neigh = false; | |
1276 | bool sameseq, similar_ttl; | |
1277 | struct sk_buff *skb_priv; | |
1278 | struct ethhdr *ethhdr; | |
6b5e971a | 1279 | u8 *prev_sender; |
4b426b10 | 1280 | bool is_bidirect; |
fc957275 | 1281 | |
7351a482 SW |
1282 | /* create a private copy of the skb, as some functions change tq value |
1283 | * and/or flags. | |
fc957275 | 1284 | */ |
7351a482 SW |
1285 | skb_priv = skb_copy(skb, GFP_ATOMIC); |
1286 | if (!skb_priv) | |
fc957275 ML |
1287 | return; |
1288 | ||
7351a482 SW |
1289 | ethhdr = eth_hdr(skb_priv); |
1290 | ogm_packet = (struct batadv_ogm_packet *)(skb_priv->data + ogm_offset); | |
fc957275 | 1291 | |
7351a482 SW |
1292 | dup_status = batadv_iv_ogm_update_seqnos(ethhdr, ogm_packet, |
1293 | if_incoming, if_outgoing); | |
1294 | if (batadv_compare_eth(ethhdr->h_source, ogm_packet->orig)) | |
75cd33f8 | 1295 | is_single_hop_neigh = true; |
fc957275 | 1296 | |
7c24bbbe | 1297 | if (dup_status == BATADV_PROTECTED) { |
39c75a51 | 1298 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1299 | "Drop packet: packet within seqno protection time (sender: %pM)\n", |
1300 | ethhdr->h_source); | |
fc957275 ML |
1301 | goto out; |
1302 | } | |
1303 | ||
7351a482 | 1304 | if (ogm_packet->tq == 0) { |
39c75a51 | 1305 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1306 | "Drop packet: originator packet with tq equal 0\n"); |
fc957275 ML |
1307 | goto out; |
1308 | } | |
1309 | ||
4ff1e2a7 ML |
1310 | if (is_single_hop_neigh) { |
1311 | hardif_neigh = batadv_hardif_neigh_get(if_incoming, | |
1312 | ethhdr->h_source); | |
1313 | if (hardif_neigh) | |
1314 | hardif_neigh->last_seen = jiffies; | |
1315 | } | |
1316 | ||
7351a482 | 1317 | router = batadv_orig_router_get(orig_node, if_outgoing); |
0538f759 | 1318 | if (router) { |
7351a482 SW |
1319 | router_router = batadv_orig_router_get(router->orig_node, |
1320 | if_outgoing); | |
1321 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
0538f759 | 1322 | } |
fc957275 | 1323 | |
7351a482 | 1324 | if ((router_ifinfo && router_ifinfo->bat_iv.tq_avg != 0) && |
1eda58bf | 1325 | (batadv_compare_eth(router->addr, ethhdr->h_source))) |
13b2541b ML |
1326 | is_from_best_next_hop = true; |
1327 | ||
7351a482 | 1328 | prev_sender = ogm_packet->prev_sender; |
fc957275 ML |
1329 | /* avoid temporary routing loops */ |
1330 | if (router && router_router && | |
1eda58bf | 1331 | (batadv_compare_eth(router->addr, prev_sender)) && |
7351a482 | 1332 | !(batadv_compare_eth(ogm_packet->orig, prev_sender)) && |
1eda58bf | 1333 | (batadv_compare_eth(router->addr, router_router->addr))) { |
39c75a51 | 1334 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1335 | "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n", |
1336 | ethhdr->h_source); | |
fc957275 ML |
1337 | goto out; |
1338 | } | |
1339 | ||
7351a482 SW |
1340 | if (if_outgoing == BATADV_IF_DEFAULT) |
1341 | batadv_tvlv_ogm_receive(bat_priv, ogm_packet, orig_node); | |
ef261577 | 1342 | |
fc957275 | 1343 | /* if sender is a direct neighbor the sender mac equals |
9cfc7bd6 SE |
1344 | * originator mac |
1345 | */ | |
c67893d1 SE |
1346 | if (is_single_hop_neigh) |
1347 | orig_neigh_node = orig_node; | |
1348 | else | |
bbad0a5e AQ |
1349 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, |
1350 | ethhdr->h_source); | |
c67893d1 | 1351 | |
fc957275 ML |
1352 | if (!orig_neigh_node) |
1353 | goto out; | |
1354 | ||
d56b1705 MH |
1355 | /* Update nc_nodes of the originator */ |
1356 | batadv_nc_update_nc_node(bat_priv, orig_node, orig_neigh_node, | |
7351a482 | 1357 | ogm_packet, is_single_hop_neigh); |
d56b1705 | 1358 | |
7351a482 SW |
1359 | orig_neigh_router = batadv_orig_router_get(orig_neigh_node, |
1360 | if_outgoing); | |
fc957275 ML |
1361 | |
1362 | /* drop packet if sender is not a direct neighbor and if we | |
9cfc7bd6 SE |
1363 | * don't route towards it |
1364 | */ | |
825ffe1f | 1365 | if (!is_single_hop_neigh && !orig_neigh_router) { |
39c75a51 | 1366 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1367 | "Drop packet: OGM via unknown neighbor!\n"); |
fc957275 ML |
1368 | goto out_neigh; |
1369 | } | |
1370 | ||
fe8bc396 | 1371 | is_bidirect = batadv_iv_ogm_calc_tq(orig_node, orig_neigh_node, |
7351a482 SW |
1372 | ogm_packet, if_incoming, |
1373 | if_outgoing); | |
fc957275 | 1374 | |
fc957275 | 1375 | /* update ranking if it is not a duplicate or has the same |
9cfc7bd6 SE |
1376 | * seqno and similar ttl as the non-duplicate |
1377 | */ | |
7351a482 SW |
1378 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1379 | if (!orig_ifinfo) | |
1380 | goto out_neigh; | |
1381 | ||
1382 | sameseq = orig_ifinfo->last_real_seqno == ntohl(ogm_packet->seqno); | |
1383 | similar_ttl = (orig_ifinfo->last_ttl - 3) <= ogm_packet->ttl; | |
1384 | ||
825ffe1f | 1385 | if (is_bidirect && (dup_status == BATADV_NO_DUP || |
7351a482 SW |
1386 | (sameseq && similar_ttl))) { |
1387 | batadv_iv_ogm_orig_update(bat_priv, orig_node, | |
1388 | orig_ifinfo, ethhdr, | |
1389 | ogm_packet, if_incoming, | |
1390 | if_outgoing, dup_status); | |
1391 | } | |
35f94779 | 1392 | batadv_orig_ifinfo_put(orig_ifinfo); |
fc957275 | 1393 | |
ef0a937f SW |
1394 | /* only forward for specific interface, not for the default one. */ |
1395 | if (if_outgoing == BATADV_IF_DEFAULT) | |
1396 | goto out_neigh; | |
1397 | ||
fc957275 ML |
1398 | /* is single hop (direct) neighbor */ |
1399 | if (is_single_hop_neigh) { | |
7351a482 SW |
1400 | /* OGMs from secondary interfaces should only scheduled once |
1401 | * per interface where it has been received, not multiple times | |
1402 | */ | |
825ffe1f SE |
1403 | if (ogm_packet->ttl <= 2 && |
1404 | if_incoming != if_outgoing) { | |
7351a482 SW |
1405 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1406 | "Drop packet: OGM from secondary interface and wrong outgoing interface\n"); | |
1407 | goto out_neigh; | |
1408 | } | |
fc957275 | 1409 | /* mark direct link on incoming interface */ |
7351a482 | 1410 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1411 | is_single_hop_neigh, |
ef0a937f SW |
1412 | is_from_best_next_hop, if_incoming, |
1413 | if_outgoing); | |
fc957275 | 1414 | |
39c75a51 | 1415 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1416 | "Forwarding packet: rebroadcast neighbor packet with direct link flag\n"); |
fc957275 ML |
1417 | goto out_neigh; |
1418 | } | |
1419 | ||
1420 | /* multihop originator */ | |
fe8bc396 | 1421 | if (!is_bidirect) { |
39c75a51 | 1422 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1423 | "Drop packet: not received via bidirectional link\n"); |
fc957275 ML |
1424 | goto out_neigh; |
1425 | } | |
1426 | ||
7c24bbbe | 1427 | if (dup_status == BATADV_NEIGH_DUP) { |
39c75a51 | 1428 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1429 | "Drop packet: duplicate packet received\n"); |
fc957275 ML |
1430 | goto out_neigh; |
1431 | } | |
1432 | ||
39c75a51 | 1433 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1434 | "Forwarding packet: rebroadcast originator packet\n"); |
7351a482 | 1435 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1436 | is_single_hop_neigh, is_from_best_next_hop, |
ef0a937f | 1437 | if_incoming, if_outgoing); |
fc957275 ML |
1438 | |
1439 | out_neigh: | |
825ffe1f | 1440 | if (orig_neigh_node && !is_single_hop_neigh) |
5d967310 | 1441 | batadv_orig_node_put(orig_neigh_node); |
fc957275 | 1442 | out: |
c1e517fb | 1443 | if (router_ifinfo) |
044fa3ae | 1444 | batadv_neigh_ifinfo_put(router_ifinfo); |
fc957275 | 1445 | if (router) |
25bb2509 | 1446 | batadv_neigh_node_put(router); |
fc957275 | 1447 | if (router_router) |
25bb2509 | 1448 | batadv_neigh_node_put(router_router); |
fc957275 | 1449 | if (orig_neigh_router) |
25bb2509 | 1450 | batadv_neigh_node_put(orig_neigh_router); |
4ff1e2a7 | 1451 | if (hardif_neigh) |
accadc35 | 1452 | batadv_hardif_neigh_put(hardif_neigh); |
fc957275 | 1453 | |
bd687fe4 | 1454 | consume_skb(skb_priv); |
7351a482 SW |
1455 | } |
1456 | ||
dee222c7 SE |
1457 | /** |
1458 | * batadv_iv_ogm_process_reply() - Check OGM for direct reply and process it | |
1459 | * @ogm_packet: rebroadcast OGM packet to process | |
1460 | * @if_incoming: the interface where this packet was received | |
1461 | * @orig_node: originator which reproadcasted the OGMs | |
1462 | * @if_incoming_seqno: OGM sequence number when rebroadcast was received | |
1463 | */ | |
1464 | static void batadv_iv_ogm_process_reply(struct batadv_ogm_packet *ogm_packet, | |
1465 | struct batadv_hard_iface *if_incoming, | |
1466 | struct batadv_orig_node *orig_node, | |
1467 | u32 if_incoming_seqno) | |
1468 | { | |
1469 | struct batadv_orig_ifinfo *orig_ifinfo; | |
1470 | s32 bit_pos; | |
1471 | u8 *weight; | |
1472 | ||
1473 | /* neighbor has to indicate direct link and it has to | |
1474 | * come via the corresponding interface | |
1475 | */ | |
1476 | if (!(ogm_packet->flags & BATADV_DIRECTLINK)) | |
1477 | return; | |
1478 | ||
1479 | if (!batadv_compare_eth(if_incoming->net_dev->dev_addr, | |
1480 | ogm_packet->orig)) | |
1481 | return; | |
1482 | ||
1483 | orig_ifinfo = batadv_orig_ifinfo_get(orig_node, if_incoming); | |
1484 | if (!orig_ifinfo) | |
1485 | return; | |
1486 | ||
1487 | /* save packet seqno for bidirectional check */ | |
1488 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
1489 | bit_pos = if_incoming_seqno - 2; | |
1490 | bit_pos -= ntohl(ogm_packet->seqno); | |
1491 | batadv_set_bit(orig_ifinfo->bat_iv.bcast_own, bit_pos); | |
1492 | weight = &orig_ifinfo->bat_iv.bcast_own_sum; | |
1493 | *weight = bitmap_weight(orig_ifinfo->bat_iv.bcast_own, | |
1494 | BATADV_TQ_LOCAL_WINDOW_SIZE); | |
1495 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
1496 | ||
1497 | batadv_orig_ifinfo_put(orig_ifinfo); | |
1498 | } | |
1499 | ||
7351a482 | 1500 | /** |
7e9a8c2c | 1501 | * batadv_iv_ogm_process() - process an incoming batman iv OGM |
7351a482 SW |
1502 | * @skb: the skb containing the OGM |
1503 | * @ogm_offset: offset to the OGM which should be processed (for aggregates) | |
1504 | * @if_incoming: the interface where this packet was receved | |
1505 | */ | |
1506 | static void batadv_iv_ogm_process(const struct sk_buff *skb, int ogm_offset, | |
1507 | struct batadv_hard_iface *if_incoming) | |
1508 | { | |
1509 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); | |
1510 | struct batadv_orig_node *orig_neigh_node, *orig_node; | |
1511 | struct batadv_hard_iface *hard_iface; | |
1512 | struct batadv_ogm_packet *ogm_packet; | |
6b5e971a | 1513 | u32 if_incoming_seqno; |
7351a482 SW |
1514 | bool has_directlink_flag; |
1515 | struct ethhdr *ethhdr; | |
1516 | bool is_my_oldorig = false; | |
1517 | bool is_my_addr = false; | |
1518 | bool is_my_orig = false; | |
1519 | ||
1520 | ogm_packet = (struct batadv_ogm_packet *)(skb->data + ogm_offset); | |
1521 | ethhdr = eth_hdr(skb); | |
1522 | ||
1523 | /* Silently drop when the batman packet is actually not a | |
1524 | * correct packet. | |
1525 | * | |
1526 | * This might happen if a packet is padded (e.g. Ethernet has a | |
1527 | * minimum frame length of 64 byte) and the aggregation interprets | |
1528 | * it as an additional length. | |
1529 | * | |
1530 | * TODO: A more sane solution would be to have a bit in the | |
1531 | * batadv_ogm_packet to detect whether the packet is the last | |
1532 | * packet in an aggregation. Here we expect that the padding | |
1533 | * is always zero (or not 0x01) | |
1534 | */ | |
1535 | if (ogm_packet->packet_type != BATADV_IV_OGM) | |
1536 | return; | |
1537 | ||
1538 | /* could be changed by schedule_own_packet() */ | |
1539 | if_incoming_seqno = atomic_read(&if_incoming->bat_iv.ogm_seqno); | |
1540 | ||
1541 | if (ogm_packet->flags & BATADV_DIRECTLINK) | |
1542 | has_directlink_flag = true; | |
1543 | else | |
1544 | has_directlink_flag = false; | |
1545 | ||
1546 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1547 | "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", | |
1548 | ethhdr->h_source, if_incoming->net_dev->name, | |
1549 | if_incoming->net_dev->dev_addr, ogm_packet->orig, | |
1550 | ogm_packet->prev_sender, ntohl(ogm_packet->seqno), | |
1551 | ogm_packet->tq, ogm_packet->ttl, | |
1552 | ogm_packet->version, has_directlink_flag); | |
1553 | ||
1554 | rcu_read_lock(); | |
1555 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1556 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1557 | continue; | |
1558 | ||
1559 | if (hard_iface->soft_iface != if_incoming->soft_iface) | |
1560 | continue; | |
1561 | ||
1562 | if (batadv_compare_eth(ethhdr->h_source, | |
1563 | hard_iface->net_dev->dev_addr)) | |
1564 | is_my_addr = true; | |
1565 | ||
1566 | if (batadv_compare_eth(ogm_packet->orig, | |
1567 | hard_iface->net_dev->dev_addr)) | |
1568 | is_my_orig = true; | |
1569 | ||
1570 | if (batadv_compare_eth(ogm_packet->prev_sender, | |
1571 | hard_iface->net_dev->dev_addr)) | |
1572 | is_my_oldorig = true; | |
1573 | } | |
1574 | rcu_read_unlock(); | |
1575 | ||
1576 | if (is_my_addr) { | |
1577 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1578 | "Drop packet: received my own broadcast (sender: %pM)\n", | |
1579 | ethhdr->h_source); | |
1580 | return; | |
1581 | } | |
1582 | ||
1583 | if (is_my_orig) { | |
7351a482 SW |
1584 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, |
1585 | ethhdr->h_source); | |
1586 | if (!orig_neigh_node) | |
1587 | return; | |
1588 | ||
dee222c7 SE |
1589 | batadv_iv_ogm_process_reply(ogm_packet, if_incoming, |
1590 | orig_neigh_node, if_incoming_seqno); | |
7351a482 SW |
1591 | |
1592 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1593 | "Drop packet: originator packet from myself (via neighbor)\n"); | |
5d967310 | 1594 | batadv_orig_node_put(orig_neigh_node); |
7351a482 SW |
1595 | return; |
1596 | } | |
1597 | ||
1598 | if (is_my_oldorig) { | |
1599 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1600 | "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n", | |
1601 | ethhdr->h_source); | |
1602 | return; | |
1603 | } | |
1604 | ||
1605 | if (ogm_packet->flags & BATADV_NOT_BEST_NEXT_HOP) { | |
1606 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1607 | "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n", | |
1608 | ethhdr->h_source); | |
1609 | return; | |
1610 | } | |
1611 | ||
1612 | orig_node = batadv_iv_ogm_orig_get(bat_priv, ogm_packet->orig); | |
1613 | if (!orig_node) | |
1614 | return; | |
1615 | ||
1616 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, | |
1617 | if_incoming, BATADV_IF_DEFAULT); | |
1618 | ||
1619 | rcu_read_lock(); | |
1620 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1621 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1622 | continue; | |
1623 | ||
1624 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
1625 | continue; | |
1626 | ||
27353446 SE |
1627 | if (!kref_get_unless_zero(&hard_iface->refcount)) |
1628 | continue; | |
1629 | ||
7351a482 SW |
1630 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, |
1631 | if_incoming, hard_iface); | |
27353446 SE |
1632 | |
1633 | batadv_hardif_put(hard_iface); | |
7351a482 SW |
1634 | } |
1635 | rcu_read_unlock(); | |
1636 | ||
5d967310 | 1637 | batadv_orig_node_put(orig_node); |
fc957275 ML |
1638 | } |
1639 | ||
f0d97253 AQ |
1640 | static void batadv_iv_send_outstanding_bat_ogm_packet(struct work_struct *work) |
1641 | { | |
1642 | struct delayed_work *delayed_work; | |
1643 | struct batadv_forw_packet *forw_packet; | |
1644 | struct batadv_priv *bat_priv; | |
bd687fe4 | 1645 | bool dropped = false; |
f0d97253 AQ |
1646 | |
1647 | delayed_work = to_delayed_work(work); | |
1648 | forw_packet = container_of(delayed_work, struct batadv_forw_packet, | |
1649 | delayed_work); | |
1650 | bat_priv = netdev_priv(forw_packet->if_incoming->soft_iface); | |
f0d97253 | 1651 | |
bd687fe4 SE |
1652 | if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) { |
1653 | dropped = true; | |
f0d97253 | 1654 | goto out; |
bd687fe4 | 1655 | } |
f0d97253 AQ |
1656 | |
1657 | batadv_iv_ogm_emit(forw_packet); | |
1658 | ||
1659 | /* we have to have at least one packet in the queue to determine the | |
1660 | * queues wake up time unless we are shutting down. | |
1661 | * | |
1662 | * only re-schedule if this is the "original" copy, e.g. the OGM of the | |
1663 | * primary interface should only be rescheduled once per period, but | |
1664 | * this function will be called for the forw_packet instances of the | |
1665 | * other secondary interfaces as well. | |
1666 | */ | |
1667 | if (forw_packet->own && | |
1668 | forw_packet->if_incoming == forw_packet->if_outgoing) | |
1669 | batadv_iv_ogm_schedule(forw_packet->if_incoming); | |
1670 | ||
1671 | out: | |
9b4aec64 LL |
1672 | /* do we get something for free()? */ |
1673 | if (batadv_forw_packet_steal(forw_packet, | |
1674 | &bat_priv->forw_bat_list_lock)) | |
1675 | batadv_forw_packet_free(forw_packet, dropped); | |
f0d97253 AQ |
1676 | } |
1677 | ||
fe8bc396 | 1678 | static int batadv_iv_ogm_receive(struct sk_buff *skb, |
56303d34 | 1679 | struct batadv_hard_iface *if_incoming) |
fc957275 | 1680 | { |
56303d34 | 1681 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
7351a482 | 1682 | struct batadv_ogm_packet *ogm_packet; |
6b5e971a | 1683 | u8 *packet_pos; |
7351a482 | 1684 | int ogm_offset; |
b91a2543 SE |
1685 | bool res; |
1686 | int ret = NET_RX_DROP; | |
c3e29312 | 1687 | |
b91a2543 SE |
1688 | res = batadv_check_management_packet(skb, if_incoming, BATADV_OGM_HLEN); |
1689 | if (!res) | |
1690 | goto free_skb; | |
fc957275 | 1691 | |
edbf12ba ML |
1692 | /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface |
1693 | * that does not have B.A.T.M.A.N. IV enabled ? | |
1694 | */ | |
29824a55 | 1695 | if (bat_priv->algo_ops->iface.enable != batadv_iv_ogm_iface_enable) |
b91a2543 | 1696 | goto free_skb; |
edbf12ba | 1697 | |
d69909d2 SE |
1698 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_RX); |
1699 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES, | |
f8214865 MH |
1700 | skb->len + ETH_HLEN); |
1701 | ||
7351a482 SW |
1702 | ogm_offset = 0; |
1703 | ogm_packet = (struct batadv_ogm_packet *)skb->data; | |
fc957275 ML |
1704 | |
1705 | /* unpack the aggregated packets and process them one by one */ | |
7351a482 SW |
1706 | while (batadv_iv_ogm_aggr_packet(ogm_offset, skb_headlen(skb), |
1707 | ogm_packet->tvlv_len)) { | |
1708 | batadv_iv_ogm_process(skb, ogm_offset, if_incoming); | |
fc957275 | 1709 | |
7351a482 SW |
1710 | ogm_offset += BATADV_OGM_HLEN; |
1711 | ogm_offset += ntohs(ogm_packet->tvlv_len); | |
fc957275 | 1712 | |
7351a482 SW |
1713 | packet_pos = skb->data + ogm_offset; |
1714 | ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b47506d9 | 1715 | } |
c3e29312 | 1716 | |
b91a2543 SE |
1717 | ret = NET_RX_SUCCESS; |
1718 | ||
1719 | free_skb: | |
1720 | if (ret == NET_RX_SUCCESS) | |
1721 | consume_skb(skb); | |
1722 | else | |
1723 | kfree_skb(skb); | |
1724 | ||
1725 | return ret; | |
fc957275 | 1726 | } |
1c280471 | 1727 | |
dc1cbd14 | 1728 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
1b371d13 | 1729 | /** |
7e9a8c2c | 1730 | * batadv_iv_ogm_orig_print_neigh() - print neighbors for the originator table |
89652331 SW |
1731 | * @orig_node: the orig_node for which the neighbors are printed |
1732 | * @if_outgoing: outgoing interface for these entries | |
1733 | * @seq: debugfs table seq_file struct | |
1734 | * | |
1735 | * Must be called while holding an rcu lock. | |
1736 | */ | |
1737 | static void | |
1738 | batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node *orig_node, | |
1739 | struct batadv_hard_iface *if_outgoing, | |
1740 | struct seq_file *seq) | |
1741 | { | |
1742 | struct batadv_neigh_node *neigh_node; | |
1743 | struct batadv_neigh_ifinfo *n_ifinfo; | |
1744 | ||
1745 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { | |
1746 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); | |
1747 | if (!n_ifinfo) | |
1748 | continue; | |
1749 | ||
1750 | seq_printf(seq, " %pM (%3i)", | |
1751 | neigh_node->addr, | |
1752 | n_ifinfo->bat_iv.tq_avg); | |
1753 | ||
044fa3ae | 1754 | batadv_neigh_ifinfo_put(n_ifinfo); |
89652331 SW |
1755 | } |
1756 | } | |
1757 | ||
737a2a22 | 1758 | /** |
7e9a8c2c | 1759 | * batadv_iv_ogm_orig_print() - print the originator table |
737a2a22 AQ |
1760 | * @bat_priv: the bat priv with all the soft interface information |
1761 | * @seq: debugfs table seq_file struct | |
cb1c92ec | 1762 | * @if_outgoing: the outgoing interface for which this should be printed |
737a2a22 AQ |
1763 | */ |
1764 | static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv, | |
cb1c92ec SW |
1765 | struct seq_file *seq, |
1766 | struct batadv_hard_iface *if_outgoing) | |
737a2a22 | 1767 | { |
89652331 | 1768 | struct batadv_neigh_node *neigh_node; |
737a2a22 AQ |
1769 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
1770 | int last_seen_msecs, last_seen_secs; | |
1771 | struct batadv_orig_node *orig_node; | |
89652331 | 1772 | struct batadv_neigh_ifinfo *n_ifinfo; |
737a2a22 AQ |
1773 | unsigned long last_seen_jiffies; |
1774 | struct hlist_head *head; | |
1775 | int batman_count = 0; | |
6b5e971a | 1776 | u32 i; |
737a2a22 | 1777 | |
925a6f37 AQ |
1778 | seq_puts(seq, |
1779 | " Originator last-seen (#/255) Nexthop [outgoingIF]: Potential nexthops ...\n"); | |
737a2a22 AQ |
1780 | |
1781 | for (i = 0; i < hash->size; i++) { | |
1782 | head = &hash->table[i]; | |
1783 | ||
1784 | rcu_read_lock(); | |
1785 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
7351a482 | 1786 | neigh_node = batadv_orig_router_get(orig_node, |
cb1c92ec | 1787 | if_outgoing); |
737a2a22 AQ |
1788 | if (!neigh_node) |
1789 | continue; | |
1790 | ||
89652331 | 1791 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, |
cb1c92ec | 1792 | if_outgoing); |
89652331 SW |
1793 | if (!n_ifinfo) |
1794 | goto next; | |
1795 | ||
1796 | if (n_ifinfo->bat_iv.tq_avg == 0) | |
737a2a22 AQ |
1797 | goto next; |
1798 | ||
1799 | last_seen_jiffies = jiffies - orig_node->last_seen; | |
1800 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
1801 | last_seen_secs = last_seen_msecs / 1000; | |
1802 | last_seen_msecs = last_seen_msecs % 1000; | |
1803 | ||
1804 | seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:", | |
1805 | orig_node->orig, last_seen_secs, | |
89652331 | 1806 | last_seen_msecs, n_ifinfo->bat_iv.tq_avg, |
737a2a22 AQ |
1807 | neigh_node->addr, |
1808 | neigh_node->if_incoming->net_dev->name); | |
1809 | ||
cb1c92ec SW |
1810 | batadv_iv_ogm_orig_print_neigh(orig_node, if_outgoing, |
1811 | seq); | |
626caae9 | 1812 | seq_putc(seq, '\n'); |
737a2a22 AQ |
1813 | batman_count++; |
1814 | ||
1815 | next: | |
25bb2509 | 1816 | batadv_neigh_node_put(neigh_node); |
89652331 | 1817 | if (n_ifinfo) |
044fa3ae | 1818 | batadv_neigh_ifinfo_put(n_ifinfo); |
737a2a22 AQ |
1819 | } |
1820 | rcu_read_unlock(); | |
1821 | } | |
1822 | ||
1823 | if (batman_count == 0) | |
1824 | seq_puts(seq, "No batman nodes in range ...\n"); | |
1825 | } | |
dc1cbd14 | 1826 | #endif |
737a2a22 | 1827 | |
024f99cb | 1828 | /** |
7e9a8c2c | 1829 | * batadv_iv_ogm_neigh_get_tq_avg() - Get the TQ average for a neighbour on a |
024f99cb MS |
1830 | * given outgoing interface. |
1831 | * @neigh_node: Neighbour of interest | |
1832 | * @if_outgoing: Outgoing interface of interest | |
1833 | * @tq_avg: Pointer of where to store the TQ average | |
1834 | * | |
1835 | * Return: False if no average TQ available, otherwise true. | |
1836 | */ | |
1837 | static bool | |
1838 | batadv_iv_ogm_neigh_get_tq_avg(struct batadv_neigh_node *neigh_node, | |
1839 | struct batadv_hard_iface *if_outgoing, | |
1840 | u8 *tq_avg) | |
1841 | { | |
1842 | struct batadv_neigh_ifinfo *n_ifinfo; | |
1843 | ||
1844 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); | |
1845 | if (!n_ifinfo) | |
1846 | return false; | |
1847 | ||
1848 | *tq_avg = n_ifinfo->bat_iv.tq_avg; | |
1849 | batadv_neigh_ifinfo_put(n_ifinfo); | |
1850 | ||
1851 | return true; | |
1852 | } | |
1853 | ||
1854 | /** | |
7e9a8c2c | 1855 | * batadv_iv_ogm_orig_dump_subentry() - Dump an originator subentry into a |
024f99cb MS |
1856 | * message |
1857 | * @msg: Netlink message to dump into | |
1858 | * @portid: Port making netlink request | |
1859 | * @seq: Sequence number of netlink message | |
1860 | * @bat_priv: The bat priv with all the soft interface information | |
1861 | * @if_outgoing: Limit dump to entries with this outgoing interface | |
1862 | * @orig_node: Originator to dump | |
1863 | * @neigh_node: Single hops neighbour | |
1864 | * @best: Is the best originator | |
1865 | * | |
1866 | * Return: Error code, or 0 on success | |
1867 | */ | |
1868 | static int | |
1869 | batadv_iv_ogm_orig_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq, | |
1870 | struct batadv_priv *bat_priv, | |
1871 | struct batadv_hard_iface *if_outgoing, | |
1872 | struct batadv_orig_node *orig_node, | |
1873 | struct batadv_neigh_node *neigh_node, | |
1874 | bool best) | |
1875 | { | |
1876 | void *hdr; | |
1877 | u8 tq_avg; | |
1878 | unsigned int last_seen_msecs; | |
1879 | ||
1880 | last_seen_msecs = jiffies_to_msecs(jiffies - orig_node->last_seen); | |
1881 | ||
1882 | if (!batadv_iv_ogm_neigh_get_tq_avg(neigh_node, if_outgoing, &tq_avg)) | |
1883 | return 0; | |
1884 | ||
1885 | if (if_outgoing != BATADV_IF_DEFAULT && | |
1886 | if_outgoing != neigh_node->if_incoming) | |
1887 | return 0; | |
1888 | ||
1889 | hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, | |
1890 | NLM_F_MULTI, BATADV_CMD_GET_ORIGINATORS); | |
1891 | if (!hdr) | |
1892 | return -ENOBUFS; | |
1893 | ||
1894 | if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, | |
1895 | orig_node->orig) || | |
1896 | nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN, | |
1897 | neigh_node->addr) || | |
1898 | nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, | |
1899 | neigh_node->if_incoming->net_dev->ifindex) || | |
1900 | nla_put_u8(msg, BATADV_ATTR_TQ, tq_avg) || | |
1901 | nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, | |
1902 | last_seen_msecs)) | |
1903 | goto nla_put_failure; | |
1904 | ||
1905 | if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) | |
1906 | goto nla_put_failure; | |
1907 | ||
1908 | genlmsg_end(msg, hdr); | |
1909 | return 0; | |
1910 | ||
1911 | nla_put_failure: | |
1912 | genlmsg_cancel(msg, hdr); | |
1913 | return -EMSGSIZE; | |
1914 | } | |
1915 | ||
1916 | /** | |
7e9a8c2c | 1917 | * batadv_iv_ogm_orig_dump_entry() - Dump an originator entry into a message |
024f99cb MS |
1918 | * @msg: Netlink message to dump into |
1919 | * @portid: Port making netlink request | |
1920 | * @seq: Sequence number of netlink message | |
1921 | * @bat_priv: The bat priv with all the soft interface information | |
1922 | * @if_outgoing: Limit dump to entries with this outgoing interface | |
1923 | * @orig_node: Originator to dump | |
1924 | * @sub_s: Number of sub entries to skip | |
1925 | * | |
1926 | * This function assumes the caller holds rcu_read_lock(). | |
1927 | * | |
1928 | * Return: Error code, or 0 on success | |
1929 | */ | |
1930 | static int | |
1931 | batadv_iv_ogm_orig_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, | |
1932 | struct batadv_priv *bat_priv, | |
1933 | struct batadv_hard_iface *if_outgoing, | |
1934 | struct batadv_orig_node *orig_node, int *sub_s) | |
1935 | { | |
1936 | struct batadv_neigh_node *neigh_node_best; | |
1937 | struct batadv_neigh_node *neigh_node; | |
1938 | int sub = 0; | |
1939 | bool best; | |
1940 | u8 tq_avg_best; | |
1941 | ||
1942 | neigh_node_best = batadv_orig_router_get(orig_node, if_outgoing); | |
1943 | if (!neigh_node_best) | |
1944 | goto out; | |
1945 | ||
1946 | if (!batadv_iv_ogm_neigh_get_tq_avg(neigh_node_best, if_outgoing, | |
1947 | &tq_avg_best)) | |
1948 | goto out; | |
1949 | ||
1950 | if (tq_avg_best == 0) | |
1951 | goto out; | |
1952 | ||
1953 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { | |
1954 | if (sub++ < *sub_s) | |
1955 | continue; | |
1956 | ||
1957 | best = (neigh_node == neigh_node_best); | |
1958 | ||
1959 | if (batadv_iv_ogm_orig_dump_subentry(msg, portid, seq, | |
1960 | bat_priv, if_outgoing, | |
1961 | orig_node, neigh_node, | |
1962 | best)) { | |
1963 | batadv_neigh_node_put(neigh_node_best); | |
1964 | ||
1965 | *sub_s = sub - 1; | |
1966 | return -EMSGSIZE; | |
1967 | } | |
1968 | } | |
1969 | ||
1970 | out: | |
1971 | if (neigh_node_best) | |
1972 | batadv_neigh_node_put(neigh_node_best); | |
1973 | ||
1974 | *sub_s = 0; | |
1975 | return 0; | |
1976 | } | |
1977 | ||
1978 | /** | |
7e9a8c2c | 1979 | * batadv_iv_ogm_orig_dump_bucket() - Dump an originator bucket into a |
024f99cb MS |
1980 | * message |
1981 | * @msg: Netlink message to dump into | |
1982 | * @portid: Port making netlink request | |
1983 | * @seq: Sequence number of netlink message | |
1984 | * @bat_priv: The bat priv with all the soft interface information | |
1985 | * @if_outgoing: Limit dump to entries with this outgoing interface | |
1986 | * @head: Bucket to be dumped | |
1987 | * @idx_s: Number of entries to be skipped | |
1988 | * @sub: Number of sub entries to be skipped | |
1989 | * | |
1990 | * Return: Error code, or 0 on success | |
1991 | */ | |
1992 | static int | |
1993 | batadv_iv_ogm_orig_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, | |
1994 | struct batadv_priv *bat_priv, | |
1995 | struct batadv_hard_iface *if_outgoing, | |
1996 | struct hlist_head *head, int *idx_s, int *sub) | |
1997 | { | |
1998 | struct batadv_orig_node *orig_node; | |
1999 | int idx = 0; | |
2000 | ||
2001 | rcu_read_lock(); | |
2002 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
2003 | if (idx++ < *idx_s) | |
2004 | continue; | |
2005 | ||
2006 | if (batadv_iv_ogm_orig_dump_entry(msg, portid, seq, bat_priv, | |
2007 | if_outgoing, orig_node, | |
2008 | sub)) { | |
2009 | rcu_read_unlock(); | |
2010 | *idx_s = idx - 1; | |
2011 | return -EMSGSIZE; | |
2012 | } | |
2013 | } | |
2014 | rcu_read_unlock(); | |
2015 | ||
2016 | *idx_s = 0; | |
2017 | *sub = 0; | |
2018 | return 0; | |
2019 | } | |
2020 | ||
2021 | /** | |
7e9a8c2c | 2022 | * batadv_iv_ogm_orig_dump() - Dump the originators into a message |
024f99cb MS |
2023 | * @msg: Netlink message to dump into |
2024 | * @cb: Control block containing additional options | |
2025 | * @bat_priv: The bat priv with all the soft interface information | |
2026 | * @if_outgoing: Limit dump to entries with this outgoing interface | |
2027 | */ | |
2028 | static void | |
2029 | batadv_iv_ogm_orig_dump(struct sk_buff *msg, struct netlink_callback *cb, | |
2030 | struct batadv_priv *bat_priv, | |
2031 | struct batadv_hard_iface *if_outgoing) | |
2032 | { | |
2033 | struct batadv_hashtable *hash = bat_priv->orig_hash; | |
2034 | struct hlist_head *head; | |
2035 | int bucket = cb->args[0]; | |
2036 | int idx = cb->args[1]; | |
2037 | int sub = cb->args[2]; | |
2038 | int portid = NETLINK_CB(cb->skb).portid; | |
2039 | ||
2040 | while (bucket < hash->size) { | |
2041 | head = &hash->table[bucket]; | |
2042 | ||
2043 | if (batadv_iv_ogm_orig_dump_bucket(msg, portid, | |
2044 | cb->nlh->nlmsg_seq, | |
2045 | bat_priv, if_outgoing, head, | |
2046 | &idx, &sub)) | |
2047 | break; | |
2048 | ||
2049 | bucket++; | |
2050 | } | |
2051 | ||
2052 | cb->args[0] = bucket; | |
2053 | cb->args[1] = idx; | |
2054 | cb->args[2] = sub; | |
2055 | } | |
2056 | ||
dc1cbd14 | 2057 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
7587405a | 2058 | /** |
7e9a8c2c | 2059 | * batadv_iv_hardif_neigh_print() - print a single hop neighbour node |
7587405a ML |
2060 | * @seq: neighbour table seq_file struct |
2061 | * @hardif_neigh: hardif neighbour information | |
2062 | */ | |
2063 | static void | |
2064 | batadv_iv_hardif_neigh_print(struct seq_file *seq, | |
2065 | struct batadv_hardif_neigh_node *hardif_neigh) | |
2066 | { | |
2067 | int last_secs, last_msecs; | |
2068 | ||
2069 | last_secs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) / 1000; | |
2070 | last_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) % 1000; | |
2071 | ||
2072 | seq_printf(seq, " %10s %pM %4i.%03is\n", | |
2073 | hardif_neigh->if_incoming->net_dev->name, | |
2074 | hardif_neigh->addr, last_secs, last_msecs); | |
2075 | } | |
2076 | ||
2077 | /** | |
7e9a8c2c | 2078 | * batadv_iv_ogm_neigh_print() - print the single hop neighbour list |
7587405a ML |
2079 | * @bat_priv: the bat priv with all the soft interface information |
2080 | * @seq: neighbour table seq_file struct | |
2081 | */ | |
2082 | static void batadv_iv_neigh_print(struct batadv_priv *bat_priv, | |
2083 | struct seq_file *seq) | |
2084 | { | |
2085 | struct net_device *net_dev = (struct net_device *)seq->private; | |
2086 | struct batadv_hardif_neigh_node *hardif_neigh; | |
2087 | struct batadv_hard_iface *hard_iface; | |
2088 | int batman_count = 0; | |
2089 | ||
925a6f37 | 2090 | seq_puts(seq, " IF Neighbor last-seen\n"); |
7587405a ML |
2091 | |
2092 | rcu_read_lock(); | |
2093 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
2094 | if (hard_iface->soft_iface != net_dev) | |
2095 | continue; | |
2096 | ||
2097 | hlist_for_each_entry_rcu(hardif_neigh, | |
2098 | &hard_iface->neigh_list, list) { | |
2099 | batadv_iv_hardif_neigh_print(seq, hardif_neigh); | |
2100 | batman_count++; | |
2101 | } | |
2102 | } | |
2103 | rcu_read_unlock(); | |
2104 | ||
2105 | if (batman_count == 0) | |
2106 | seq_puts(seq, "No batman nodes in range ...\n"); | |
2107 | } | |
dc1cbd14 | 2108 | #endif |
7587405a | 2109 | |
a3285a8f | 2110 | /** |
7e9a8c2c | 2111 | * batadv_iv_ogm_neigh_diff() - calculate tq difference of two neighbors |
a3285a8f | 2112 | * @neigh1: the first neighbor object of the comparison |
89652331 | 2113 | * @if_outgoing1: outgoing interface for the first neighbor |
a3285a8f | 2114 | * @neigh2: the second neighbor object of the comparison |
89652331 | 2115 | * @if_outgoing2: outgoing interface for the second neighbor |
57b12502 | 2116 | * @diff: pointer to integer receiving the calculated difference |
a3285a8f | 2117 | * |
57b12502 MP |
2118 | * The content of *@diff is only valid when this function returns true. |
2119 | * It is less, equal to or greater than 0 if the metric via neigh1 is lower, | |
2120 | * the same as or higher than the metric via neigh2 | |
2121 | * | |
2122 | * Return: true when the difference could be calculated, false otherwise | |
a3285a8f | 2123 | */ |
57b12502 MP |
2124 | static bool batadv_iv_ogm_neigh_diff(struct batadv_neigh_node *neigh1, |
2125 | struct batadv_hard_iface *if_outgoing1, | |
2126 | struct batadv_neigh_node *neigh2, | |
2127 | struct batadv_hard_iface *if_outgoing2, | |
2128 | int *diff) | |
a3285a8f | 2129 | { |
89652331 | 2130 | struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; |
6b5e971a | 2131 | u8 tq1, tq2; |
57b12502 | 2132 | bool ret = true; |
89652331 SW |
2133 | |
2134 | neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); | |
2135 | neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
a3285a8f | 2136 | |
89652331 | 2137 | if (!neigh1_ifinfo || !neigh2_ifinfo) { |
57b12502 | 2138 | ret = false; |
89652331 SW |
2139 | goto out; |
2140 | } | |
a3285a8f | 2141 | |
89652331 SW |
2142 | tq1 = neigh1_ifinfo->bat_iv.tq_avg; |
2143 | tq2 = neigh2_ifinfo->bat_iv.tq_avg; | |
57b12502 | 2144 | *diff = (int)tq1 - (int)tq2; |
89652331 SW |
2145 | |
2146 | out: | |
2147 | if (neigh1_ifinfo) | |
044fa3ae | 2148 | batadv_neigh_ifinfo_put(neigh1_ifinfo); |
89652331 | 2149 | if (neigh2_ifinfo) |
044fa3ae | 2150 | batadv_neigh_ifinfo_put(neigh2_ifinfo); |
89652331 | 2151 | |
57b12502 MP |
2152 | return ret; |
2153 | } | |
2154 | ||
024f99cb | 2155 | /** |
7e9a8c2c | 2156 | * batadv_iv_ogm_neigh_dump_neigh() - Dump a neighbour into a netlink message |
024f99cb MS |
2157 | * @msg: Netlink message to dump into |
2158 | * @portid: Port making netlink request | |
2159 | * @seq: Sequence number of netlink message | |
2160 | * @hardif_neigh: Neighbour to be dumped | |
2161 | * | |
2162 | * Return: Error code, or 0 on success | |
2163 | */ | |
2164 | static int | |
2165 | batadv_iv_ogm_neigh_dump_neigh(struct sk_buff *msg, u32 portid, u32 seq, | |
2166 | struct batadv_hardif_neigh_node *hardif_neigh) | |
2167 | { | |
2168 | void *hdr; | |
2169 | unsigned int last_seen_msecs; | |
2170 | ||
2171 | last_seen_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen); | |
2172 | ||
2173 | hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, | |
2174 | NLM_F_MULTI, BATADV_CMD_GET_NEIGHBORS); | |
2175 | if (!hdr) | |
2176 | return -ENOBUFS; | |
2177 | ||
2178 | if (nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN, | |
2179 | hardif_neigh->addr) || | |
2180 | nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, | |
2181 | hardif_neigh->if_incoming->net_dev->ifindex) || | |
2182 | nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, | |
2183 | last_seen_msecs)) | |
2184 | goto nla_put_failure; | |
2185 | ||
2186 | genlmsg_end(msg, hdr); | |
2187 | return 0; | |
2188 | ||
2189 | nla_put_failure: | |
2190 | genlmsg_cancel(msg, hdr); | |
2191 | return -EMSGSIZE; | |
2192 | } | |
2193 | ||
2194 | /** | |
7e9a8c2c | 2195 | * batadv_iv_ogm_neigh_dump_hardif() - Dump the neighbours of a hard interface |
024f99cb MS |
2196 | * into a message |
2197 | * @msg: Netlink message to dump into | |
2198 | * @portid: Port making netlink request | |
2199 | * @seq: Sequence number of netlink message | |
2200 | * @bat_priv: The bat priv with all the soft interface information | |
2201 | * @hard_iface: Hard interface to dump the neighbours for | |
2202 | * @idx_s: Number of entries to skip | |
2203 | * | |
2204 | * This function assumes the caller holds rcu_read_lock(). | |
2205 | * | |
2206 | * Return: Error code, or 0 on success | |
2207 | */ | |
2208 | static int | |
2209 | batadv_iv_ogm_neigh_dump_hardif(struct sk_buff *msg, u32 portid, u32 seq, | |
2210 | struct batadv_priv *bat_priv, | |
2211 | struct batadv_hard_iface *hard_iface, | |
2212 | int *idx_s) | |
2213 | { | |
2214 | struct batadv_hardif_neigh_node *hardif_neigh; | |
2215 | int idx = 0; | |
2216 | ||
2217 | hlist_for_each_entry_rcu(hardif_neigh, | |
2218 | &hard_iface->neigh_list, list) { | |
2219 | if (idx++ < *idx_s) | |
2220 | continue; | |
2221 | ||
2222 | if (batadv_iv_ogm_neigh_dump_neigh(msg, portid, seq, | |
2223 | hardif_neigh)) { | |
2224 | *idx_s = idx - 1; | |
2225 | return -EMSGSIZE; | |
2226 | } | |
2227 | } | |
2228 | ||
2229 | *idx_s = 0; | |
2230 | return 0; | |
2231 | } | |
2232 | ||
2233 | /** | |
7e9a8c2c | 2234 | * batadv_iv_ogm_neigh_dump() - Dump the neighbours into a message |
024f99cb MS |
2235 | * @msg: Netlink message to dump into |
2236 | * @cb: Control block containing additional options | |
2237 | * @bat_priv: The bat priv with all the soft interface information | |
2238 | * @single_hardif: Limit dump to this hard interfaace | |
2239 | */ | |
2240 | static void | |
2241 | batadv_iv_ogm_neigh_dump(struct sk_buff *msg, struct netlink_callback *cb, | |
2242 | struct batadv_priv *bat_priv, | |
2243 | struct batadv_hard_iface *single_hardif) | |
2244 | { | |
2245 | struct batadv_hard_iface *hard_iface; | |
2246 | int i_hardif = 0; | |
2247 | int i_hardif_s = cb->args[0]; | |
2248 | int idx = cb->args[1]; | |
2249 | int portid = NETLINK_CB(cb->skb).portid; | |
2250 | ||
2251 | rcu_read_lock(); | |
2252 | if (single_hardif) { | |
2253 | if (i_hardif_s == 0) { | |
2254 | if (batadv_iv_ogm_neigh_dump_hardif(msg, portid, | |
2255 | cb->nlh->nlmsg_seq, | |
2256 | bat_priv, | |
2257 | single_hardif, | |
2258 | &idx) == 0) | |
2259 | i_hardif++; | |
2260 | } | |
2261 | } else { | |
2262 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, | |
2263 | list) { | |
2264 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
2265 | continue; | |
2266 | ||
2267 | if (i_hardif++ < i_hardif_s) | |
2268 | continue; | |
2269 | ||
2270 | if (batadv_iv_ogm_neigh_dump_hardif(msg, portid, | |
2271 | cb->nlh->nlmsg_seq, | |
2272 | bat_priv, | |
2273 | hard_iface, &idx)) { | |
2274 | i_hardif--; | |
2275 | break; | |
2276 | } | |
2277 | } | |
2278 | } | |
2279 | rcu_read_unlock(); | |
2280 | ||
2281 | cb->args[0] = i_hardif; | |
2282 | cb->args[1] = idx; | |
2283 | } | |
2284 | ||
57b12502 | 2285 | /** |
7e9a8c2c | 2286 | * batadv_iv_ogm_neigh_cmp() - compare the metrics of two neighbors |
57b12502 MP |
2287 | * @neigh1: the first neighbor object of the comparison |
2288 | * @if_outgoing1: outgoing interface for the first neighbor | |
2289 | * @neigh2: the second neighbor object of the comparison | |
2290 | * @if_outgoing2: outgoing interface for the second neighbor | |
2291 | * | |
2292 | * Return: a value less, equal to or greater than 0 if the metric via neigh1 is | |
2293 | * lower, the same as or higher than the metric via neigh2 | |
2294 | */ | |
2295 | static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node *neigh1, | |
2296 | struct batadv_hard_iface *if_outgoing1, | |
2297 | struct batadv_neigh_node *neigh2, | |
2298 | struct batadv_hard_iface *if_outgoing2) | |
2299 | { | |
2300 | bool ret; | |
2301 | int diff; | |
2302 | ||
2303 | ret = batadv_iv_ogm_neigh_diff(neigh1, if_outgoing1, neigh2, | |
2304 | if_outgoing2, &diff); | |
2305 | if (!ret) | |
2306 | return 0; | |
2307 | ||
89652331 | 2308 | return diff; |
a3285a8f AQ |
2309 | } |
2310 | ||
c43c981e | 2311 | /** |
7e9a8c2c | 2312 | * batadv_iv_ogm_neigh_is_sob() - check if neigh1 is similarly good or better |
18165f6f | 2313 | * than neigh2 from the metric prospective |
c43c981e | 2314 | * @neigh1: the first neighbor object of the comparison |
95298a91 | 2315 | * @if_outgoing1: outgoing interface for the first neighbor |
c43c981e | 2316 | * @neigh2: the second neighbor object of the comparison |
89652331 | 2317 | * @if_outgoing2: outgoing interface for the second neighbor |
95298a91 | 2318 | * |
62fe710f | 2319 | * Return: true if the metric via neigh1 is equally good or better than |
89652331 | 2320 | * the metric via neigh2, false otherwise. |
c43c981e | 2321 | */ |
89652331 | 2322 | static bool |
18165f6f | 2323 | batadv_iv_ogm_neigh_is_sob(struct batadv_neigh_node *neigh1, |
89652331 SW |
2324 | struct batadv_hard_iface *if_outgoing1, |
2325 | struct batadv_neigh_node *neigh2, | |
2326 | struct batadv_hard_iface *if_outgoing2) | |
c43c981e | 2327 | { |
89652331 | 2328 | bool ret; |
57b12502 | 2329 | int diff; |
c43c981e | 2330 | |
57b12502 MP |
2331 | ret = batadv_iv_ogm_neigh_diff(neigh1, if_outgoing1, neigh2, |
2332 | if_outgoing2, &diff); | |
2333 | if (!ret) | |
2334 | return false; | |
89652331 | 2335 | |
57b12502 | 2336 | ret = diff > -BATADV_TQ_SIMILARITY_THRESHOLD; |
89652331 | 2337 | return ret; |
c43c981e AQ |
2338 | } |
2339 | ||
f0d97253 AQ |
2340 | static void batadv_iv_iface_activate(struct batadv_hard_iface *hard_iface) |
2341 | { | |
2342 | /* begin scheduling originator messages on that interface */ | |
2343 | batadv_iv_ogm_schedule(hard_iface); | |
2344 | } | |
2345 | ||
1a9070ec | 2346 | /** |
7e9a8c2c | 2347 | * batadv_iv_init_sel_class() - initialize GW selection class |
1a9070ec SE |
2348 | * @bat_priv: the bat priv with all the soft interface information |
2349 | */ | |
2350 | static void batadv_iv_init_sel_class(struct batadv_priv *bat_priv) | |
2351 | { | |
2352 | /* set default TQ difference threshold to 20 */ | |
2353 | atomic_set(&bat_priv->gw.sel_class, 20); | |
2354 | } | |
2355 | ||
34d99cfe AQ |
2356 | static struct batadv_gw_node * |
2357 | batadv_iv_gw_get_best_gw_node(struct batadv_priv *bat_priv) | |
2358 | { | |
2359 | struct batadv_neigh_node *router; | |
2360 | struct batadv_neigh_ifinfo *router_ifinfo; | |
2361 | struct batadv_gw_node *gw_node, *curr_gw = NULL; | |
2362 | u64 max_gw_factor = 0; | |
2363 | u64 tmp_gw_factor = 0; | |
2364 | u8 max_tq = 0; | |
2365 | u8 tq_avg; | |
2366 | struct batadv_orig_node *orig_node; | |
2367 | ||
2368 | rcu_read_lock(); | |
70ea5cee | 2369 | hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.gateway_list, list) { |
34d99cfe AQ |
2370 | orig_node = gw_node->orig_node; |
2371 | router = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT); | |
2372 | if (!router) | |
2373 | continue; | |
2374 | ||
2375 | router_ifinfo = batadv_neigh_ifinfo_get(router, | |
2376 | BATADV_IF_DEFAULT); | |
2377 | if (!router_ifinfo) | |
2378 | goto next; | |
2379 | ||
2380 | if (!kref_get_unless_zero(&gw_node->refcount)) | |
2381 | goto next; | |
2382 | ||
2383 | tq_avg = router_ifinfo->bat_iv.tq_avg; | |
2384 | ||
2385 | switch (atomic_read(&bat_priv->gw.sel_class)) { | |
2386 | case 1: /* fast connection */ | |
2387 | tmp_gw_factor = tq_avg * tq_avg; | |
2388 | tmp_gw_factor *= gw_node->bandwidth_down; | |
2389 | tmp_gw_factor *= 100 * 100; | |
2390 | tmp_gw_factor >>= 18; | |
2391 | ||
825ffe1f SE |
2392 | if (tmp_gw_factor > max_gw_factor || |
2393 | (tmp_gw_factor == max_gw_factor && | |
2394 | tq_avg > max_tq)) { | |
34d99cfe AQ |
2395 | if (curr_gw) |
2396 | batadv_gw_node_put(curr_gw); | |
2397 | curr_gw = gw_node; | |
2398 | kref_get(&curr_gw->refcount); | |
2399 | } | |
2400 | break; | |
2401 | ||
2402 | default: /* 2: stable connection (use best statistic) | |
2403 | * 3: fast-switch (use best statistic but change as | |
2404 | * soon as a better gateway appears) | |
2405 | * XX: late-switch (use best statistic but change as | |
2406 | * soon as a better gateway appears which has | |
2407 | * $routing_class more tq points) | |
2408 | */ | |
2409 | if (tq_avg > max_tq) { | |
2410 | if (curr_gw) | |
2411 | batadv_gw_node_put(curr_gw); | |
2412 | curr_gw = gw_node; | |
2413 | kref_get(&curr_gw->refcount); | |
2414 | } | |
2415 | break; | |
2416 | } | |
2417 | ||
2418 | if (tq_avg > max_tq) | |
2419 | max_tq = tq_avg; | |
2420 | ||
2421 | if (tmp_gw_factor > max_gw_factor) | |
2422 | max_gw_factor = tmp_gw_factor; | |
2423 | ||
2424 | batadv_gw_node_put(gw_node); | |
2425 | ||
2426 | next: | |
2427 | batadv_neigh_node_put(router); | |
2428 | if (router_ifinfo) | |
2429 | batadv_neigh_ifinfo_put(router_ifinfo); | |
2430 | } | |
2431 | rcu_read_unlock(); | |
2432 | ||
2433 | return curr_gw; | |
2434 | } | |
2435 | ||
2436 | static bool batadv_iv_gw_is_eligible(struct batadv_priv *bat_priv, | |
2437 | struct batadv_orig_node *curr_gw_orig, | |
2438 | struct batadv_orig_node *orig_node) | |
2439 | { | |
2440 | struct batadv_neigh_ifinfo *router_orig_ifinfo = NULL; | |
2441 | struct batadv_neigh_ifinfo *router_gw_ifinfo = NULL; | |
2442 | struct batadv_neigh_node *router_gw = NULL; | |
2443 | struct batadv_neigh_node *router_orig = NULL; | |
2444 | u8 gw_tq_avg, orig_tq_avg; | |
2445 | bool ret = false; | |
2446 | ||
2447 | /* dynamic re-election is performed only on fast or late switch */ | |
2448 | if (atomic_read(&bat_priv->gw.sel_class) <= 2) | |
2449 | return false; | |
2450 | ||
2451 | router_gw = batadv_orig_router_get(curr_gw_orig, BATADV_IF_DEFAULT); | |
2452 | if (!router_gw) { | |
2453 | ret = true; | |
2454 | goto out; | |
2455 | } | |
2456 | ||
2457 | router_gw_ifinfo = batadv_neigh_ifinfo_get(router_gw, | |
2458 | BATADV_IF_DEFAULT); | |
2459 | if (!router_gw_ifinfo) { | |
2460 | ret = true; | |
2461 | goto out; | |
2462 | } | |
2463 | ||
2464 | router_orig = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT); | |
2465 | if (!router_orig) | |
2466 | goto out; | |
2467 | ||
2468 | router_orig_ifinfo = batadv_neigh_ifinfo_get(router_orig, | |
2469 | BATADV_IF_DEFAULT); | |
2470 | if (!router_orig_ifinfo) | |
2471 | goto out; | |
2472 | ||
2473 | gw_tq_avg = router_gw_ifinfo->bat_iv.tq_avg; | |
2474 | orig_tq_avg = router_orig_ifinfo->bat_iv.tq_avg; | |
2475 | ||
2476 | /* the TQ value has to be better */ | |
2477 | if (orig_tq_avg < gw_tq_avg) | |
2478 | goto out; | |
2479 | ||
2480 | /* if the routing class is greater than 3 the value tells us how much | |
2481 | * greater the TQ value of the new gateway must be | |
2482 | */ | |
2483 | if ((atomic_read(&bat_priv->gw.sel_class) > 3) && | |
2484 | (orig_tq_avg - gw_tq_avg < atomic_read(&bat_priv->gw.sel_class))) | |
2485 | goto out; | |
2486 | ||
2487 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
2488 | "Restarting gateway selection: better gateway found (tq curr: %i, tq new: %i)\n", | |
2489 | gw_tq_avg, orig_tq_avg); | |
2490 | ||
2491 | ret = true; | |
2492 | out: | |
2493 | if (router_gw_ifinfo) | |
2494 | batadv_neigh_ifinfo_put(router_gw_ifinfo); | |
2495 | if (router_orig_ifinfo) | |
2496 | batadv_neigh_ifinfo_put(router_orig_ifinfo); | |
2497 | if (router_gw) | |
2498 | batadv_neigh_node_put(router_gw); | |
2499 | if (router_orig) | |
2500 | batadv_neigh_node_put(router_orig); | |
2501 | ||
2502 | return ret; | |
2503 | } | |
2504 | ||
dc1cbd14 | 2505 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
34d99cfe AQ |
2506 | /* fails if orig_node has no router */ |
2507 | static int batadv_iv_gw_write_buffer_text(struct batadv_priv *bat_priv, | |
2508 | struct seq_file *seq, | |
2509 | const struct batadv_gw_node *gw_node) | |
2510 | { | |
2511 | struct batadv_gw_node *curr_gw; | |
2512 | struct batadv_neigh_node *router; | |
2513 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; | |
2514 | int ret = -1; | |
2515 | ||
2516 | router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT); | |
2517 | if (!router) | |
2518 | goto out; | |
2519 | ||
2520 | router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT); | |
2521 | if (!router_ifinfo) | |
2522 | goto out; | |
2523 | ||
2524 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); | |
2525 | ||
2526 | seq_printf(seq, "%s %pM (%3i) %pM [%10s]: %u.%u/%u.%u MBit\n", | |
2527 | (curr_gw == gw_node ? "=>" : " "), | |
2528 | gw_node->orig_node->orig, | |
2529 | router_ifinfo->bat_iv.tq_avg, router->addr, | |
2530 | router->if_incoming->net_dev->name, | |
2531 | gw_node->bandwidth_down / 10, | |
2532 | gw_node->bandwidth_down % 10, | |
2533 | gw_node->bandwidth_up / 10, | |
2534 | gw_node->bandwidth_up % 10); | |
2535 | ret = seq_has_overflowed(seq) ? -1 : 0; | |
2536 | ||
2537 | if (curr_gw) | |
2538 | batadv_gw_node_put(curr_gw); | |
2539 | out: | |
2540 | if (router_ifinfo) | |
2541 | batadv_neigh_ifinfo_put(router_ifinfo); | |
2542 | if (router) | |
2543 | batadv_neigh_node_put(router); | |
2544 | return ret; | |
2545 | } | |
2546 | ||
2547 | static void batadv_iv_gw_print(struct batadv_priv *bat_priv, | |
2548 | struct seq_file *seq) | |
2549 | { | |
2550 | struct batadv_gw_node *gw_node; | |
2551 | int gw_count = 0; | |
2552 | ||
2553 | seq_puts(seq, | |
2554 | " Gateway (#/255) Nexthop [outgoingIF]: advertised uplink bandwidth\n"); | |
2555 | ||
2556 | rcu_read_lock(); | |
70ea5cee | 2557 | hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.gateway_list, list) { |
34d99cfe AQ |
2558 | /* fails if orig_node has no router */ |
2559 | if (batadv_iv_gw_write_buffer_text(bat_priv, seq, gw_node) < 0) | |
2560 | continue; | |
2561 | ||
2562 | gw_count++; | |
2563 | } | |
2564 | rcu_read_unlock(); | |
2565 | ||
2566 | if (gw_count == 0) | |
2567 | seq_puts(seq, "No gateways in range ...\n"); | |
2568 | } | |
dc1cbd14 | 2569 | #endif |
34d99cfe | 2570 | |
efb766af | 2571 | /** |
7e9a8c2c | 2572 | * batadv_iv_gw_dump_entry() - Dump a gateway into a message |
efb766af AL |
2573 | * @msg: Netlink message to dump into |
2574 | * @portid: Port making netlink request | |
9264c85c | 2575 | * @cb: Control block containing additional options |
efb766af AL |
2576 | * @bat_priv: The bat priv with all the soft interface information |
2577 | * @gw_node: Gateway to be dumped | |
2578 | * | |
2579 | * Return: Error code, or 0 on success | |
2580 | */ | |
9264c85c SE |
2581 | static int batadv_iv_gw_dump_entry(struct sk_buff *msg, u32 portid, |
2582 | struct netlink_callback *cb, | |
efb766af AL |
2583 | struct batadv_priv *bat_priv, |
2584 | struct batadv_gw_node *gw_node) | |
2585 | { | |
2586 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; | |
2587 | struct batadv_neigh_node *router; | |
b5685d26 | 2588 | struct batadv_gw_node *curr_gw = NULL; |
10d57028 | 2589 | int ret = 0; |
efb766af AL |
2590 | void *hdr; |
2591 | ||
2592 | router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT); | |
2593 | if (!router) | |
2594 | goto out; | |
2595 | ||
2596 | router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT); | |
2597 | if (!router_ifinfo) | |
2598 | goto out; | |
2599 | ||
2600 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); | |
2601 | ||
9264c85c SE |
2602 | hdr = genlmsg_put(msg, portid, cb->nlh->nlmsg_seq, |
2603 | &batadv_netlink_family, NLM_F_MULTI, | |
2604 | BATADV_CMD_GET_GATEWAYS); | |
efb766af AL |
2605 | if (!hdr) { |
2606 | ret = -ENOBUFS; | |
2607 | goto out; | |
2608 | } | |
2609 | ||
9264c85c SE |
2610 | genl_dump_check_consistent(cb, hdr); |
2611 | ||
efb766af AL |
2612 | ret = -EMSGSIZE; |
2613 | ||
2614 | if (curr_gw == gw_node) | |
2615 | if (nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) { | |
2616 | genlmsg_cancel(msg, hdr); | |
2617 | goto out; | |
2618 | } | |
2619 | ||
2620 | if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, | |
2621 | gw_node->orig_node->orig) || | |
2622 | nla_put_u8(msg, BATADV_ATTR_TQ, router_ifinfo->bat_iv.tq_avg) || | |
2623 | nla_put(msg, BATADV_ATTR_ROUTER, ETH_ALEN, | |
2624 | router->addr) || | |
2625 | nla_put_string(msg, BATADV_ATTR_HARD_IFNAME, | |
2626 | router->if_incoming->net_dev->name) || | |
2627 | nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_DOWN, | |
2628 | gw_node->bandwidth_down) || | |
2629 | nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_UP, | |
2630 | gw_node->bandwidth_up)) { | |
2631 | genlmsg_cancel(msg, hdr); | |
2632 | goto out; | |
2633 | } | |
2634 | ||
2635 | genlmsg_end(msg, hdr); | |
2636 | ret = 0; | |
2637 | ||
2638 | out: | |
b5685d26 SE |
2639 | if (curr_gw) |
2640 | batadv_gw_node_put(curr_gw); | |
efb766af AL |
2641 | if (router_ifinfo) |
2642 | batadv_neigh_ifinfo_put(router_ifinfo); | |
2643 | if (router) | |
2644 | batadv_neigh_node_put(router); | |
2645 | return ret; | |
2646 | } | |
2647 | ||
2648 | /** | |
7e9a8c2c | 2649 | * batadv_iv_gw_dump() - Dump gateways into a message |
efb766af AL |
2650 | * @msg: Netlink message to dump into |
2651 | * @cb: Control block containing additional options | |
2652 | * @bat_priv: The bat priv with all the soft interface information | |
2653 | */ | |
2654 | static void batadv_iv_gw_dump(struct sk_buff *msg, struct netlink_callback *cb, | |
2655 | struct batadv_priv *bat_priv) | |
2656 | { | |
2657 | int portid = NETLINK_CB(cb->skb).portid; | |
2658 | struct batadv_gw_node *gw_node; | |
2659 | int idx_skip = cb->args[0]; | |
2660 | int idx = 0; | |
2661 | ||
9264c85c SE |
2662 | spin_lock_bh(&bat_priv->gw.list_lock); |
2663 | cb->seq = bat_priv->gw.generation << 1 | 1; | |
2664 | ||
2665 | hlist_for_each_entry(gw_node, &bat_priv->gw.gateway_list, list) { | |
efb766af AL |
2666 | if (idx++ < idx_skip) |
2667 | continue; | |
2668 | ||
9264c85c SE |
2669 | if (batadv_iv_gw_dump_entry(msg, portid, cb, bat_priv, |
2670 | gw_node)) { | |
efb766af AL |
2671 | idx_skip = idx - 1; |
2672 | goto unlock; | |
2673 | } | |
2674 | } | |
2675 | ||
2676 | idx_skip = idx; | |
2677 | unlock: | |
9264c85c | 2678 | spin_unlock_bh(&bat_priv->gw.list_lock); |
efb766af AL |
2679 | |
2680 | cb->args[0] = idx_skip; | |
2681 | } | |
2682 | ||
56303d34 | 2683 | static struct batadv_algo_ops batadv_batman_iv __read_mostly = { |
519d3497 | 2684 | .name = "BATMAN_IV", |
29824a55 AQ |
2685 | .iface = { |
2686 | .activate = batadv_iv_iface_activate, | |
2687 | .enable = batadv_iv_ogm_iface_enable, | |
2688 | .disable = batadv_iv_ogm_iface_disable, | |
2689 | .update_mac = batadv_iv_ogm_iface_update_mac, | |
2690 | .primary_set = batadv_iv_ogm_primary_iface_set, | |
2691 | }, | |
2692 | .neigh = { | |
2693 | .cmp = batadv_iv_ogm_neigh_cmp, | |
2694 | .is_similar_or_better = batadv_iv_ogm_neigh_is_sob, | |
dc1cbd14 | 2695 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
29824a55 | 2696 | .print = batadv_iv_neigh_print, |
dc1cbd14 | 2697 | #endif |
024f99cb | 2698 | .dump = batadv_iv_ogm_neigh_dump, |
29824a55 AQ |
2699 | }, |
2700 | .orig = { | |
dc1cbd14 | 2701 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
29824a55 | 2702 | .print = batadv_iv_ogm_orig_print, |
dc1cbd14 | 2703 | #endif |
024f99cb | 2704 | .dump = batadv_iv_ogm_orig_dump, |
29824a55 | 2705 | }, |
34d99cfe | 2706 | .gw = { |
1a9070ec | 2707 | .init_sel_class = batadv_iv_init_sel_class, |
34d99cfe AQ |
2708 | .get_best_gw_node = batadv_iv_gw_get_best_gw_node, |
2709 | .is_eligible = batadv_iv_gw_is_eligible, | |
dc1cbd14 | 2710 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
34d99cfe | 2711 | .print = batadv_iv_gw_print, |
dc1cbd14 | 2712 | #endif |
efb766af | 2713 | .dump = batadv_iv_gw_dump, |
34d99cfe | 2714 | }, |
1c280471 ML |
2715 | }; |
2716 | ||
ff15c27c SE |
2717 | /** |
2718 | * batadv_iv_init() - B.A.T.M.A.N. IV initialization function | |
2719 | * | |
2720 | * Return: 0 on success or negative error number in case of failure | |
2721 | */ | |
81c524f7 | 2722 | int __init batadv_iv_init(void) |
1c280471 | 2723 | { |
c3e29312 ML |
2724 | int ret; |
2725 | ||
2726 | /* batman originator packet */ | |
acd34afa SE |
2727 | ret = batadv_recv_handler_register(BATADV_IV_OGM, |
2728 | batadv_iv_ogm_receive); | |
c3e29312 ML |
2729 | if (ret < 0) |
2730 | goto out; | |
2731 | ||
fe8bc396 | 2732 | ret = batadv_algo_register(&batadv_batman_iv); |
c3e29312 ML |
2733 | if (ret < 0) |
2734 | goto handler_unregister; | |
2735 | ||
2736 | goto out; | |
2737 | ||
2738 | handler_unregister: | |
acd34afa | 2739 | batadv_recv_handler_unregister(BATADV_IV_OGM); |
c3e29312 ML |
2740 | out: |
2741 | return ret; | |
1c280471 | 2742 | } |