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c6c8fea2 | 1 | /* |
64afe353 | 2 | * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
3 | * |
4 | * Marek Lindner, Simon Wunderlich | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of version 2 of the GNU General Public | |
8 | * License as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
18 | * 02110-1301, USA | |
19 | * | |
20 | */ | |
21 | ||
22 | #include "main.h" | |
23 | #include "send.h" | |
24 | #include "routing.h" | |
25 | #include "translation-table.h" | |
26 | #include "soft-interface.h" | |
27 | #include "hard-interface.h" | |
28 | #include "types.h" | |
29 | #include "vis.h" | |
30 | #include "aggregation.h" | |
31 | #include "gateway_common.h" | |
32 | #include "originator.h" | |
33 | ||
34 | static void send_outstanding_bcast_packet(struct work_struct *work); | |
35 | ||
36 | /* apply hop penalty for a normal link */ | |
37 | static uint8_t hop_penalty(const uint8_t tq, struct bat_priv *bat_priv) | |
38 | { | |
39 | int hop_penalty = atomic_read(&bat_priv->hop_penalty); | |
40 | return (tq * (TQ_MAX_VALUE - hop_penalty)) / (TQ_MAX_VALUE); | |
41 | } | |
42 | ||
43 | /* when do we schedule our own packet to be sent */ | |
44 | static unsigned long own_send_time(struct bat_priv *bat_priv) | |
45 | { | |
46 | return jiffies + msecs_to_jiffies( | |
47 | atomic_read(&bat_priv->orig_interval) - | |
48 | JITTER + (random32() % 2*JITTER)); | |
49 | } | |
50 | ||
51 | /* when do we schedule a forwarded packet to be sent */ | |
74ef1153 | 52 | static unsigned long forward_send_time(void) |
c6c8fea2 SE |
53 | { |
54 | return jiffies + msecs_to_jiffies(random32() % (JITTER/2)); | |
55 | } | |
56 | ||
57 | /* send out an already prepared packet to the given address via the | |
58 | * specified batman interface */ | |
59 | int send_skb_packet(struct sk_buff *skb, | |
60 | struct batman_if *batman_if, | |
61 | uint8_t *dst_addr) | |
62 | { | |
63 | struct ethhdr *ethhdr; | |
64 | ||
65 | if (batman_if->if_status != IF_ACTIVE) | |
66 | goto send_skb_err; | |
67 | ||
68 | if (unlikely(!batman_if->net_dev)) | |
69 | goto send_skb_err; | |
70 | ||
71 | if (!(batman_if->net_dev->flags & IFF_UP)) { | |
72 | pr_warning("Interface %s is not up - can't send packet via " | |
73 | "that interface!\n", batman_if->net_dev->name); | |
74 | goto send_skb_err; | |
75 | } | |
76 | ||
77 | /* push to the ethernet header. */ | |
78 | if (my_skb_head_push(skb, sizeof(struct ethhdr)) < 0) | |
79 | goto send_skb_err; | |
80 | ||
81 | skb_reset_mac_header(skb); | |
82 | ||
83 | ethhdr = (struct ethhdr *) skb_mac_header(skb); | |
84 | memcpy(ethhdr->h_source, batman_if->net_dev->dev_addr, ETH_ALEN); | |
85 | memcpy(ethhdr->h_dest, dst_addr, ETH_ALEN); | |
86 | ethhdr->h_proto = __constant_htons(ETH_P_BATMAN); | |
87 | ||
88 | skb_set_network_header(skb, ETH_HLEN); | |
89 | skb->priority = TC_PRIO_CONTROL; | |
90 | skb->protocol = __constant_htons(ETH_P_BATMAN); | |
91 | ||
92 | skb->dev = batman_if->net_dev; | |
93 | ||
94 | /* dev_queue_xmit() returns a negative result on error. However on | |
95 | * congestion and traffic shaping, it drops and returns NET_XMIT_DROP | |
96 | * (which is > 0). This will not be treated as an error. */ | |
97 | ||
98 | return dev_queue_xmit(skb); | |
99 | send_skb_err: | |
100 | kfree_skb(skb); | |
101 | return NET_XMIT_DROP; | |
102 | } | |
103 | ||
104 | /* Send a packet to a given interface */ | |
105 | static void send_packet_to_if(struct forw_packet *forw_packet, | |
106 | struct batman_if *batman_if) | |
107 | { | |
108 | struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface); | |
109 | char *fwd_str; | |
110 | uint8_t packet_num; | |
111 | int16_t buff_pos; | |
112 | struct batman_packet *batman_packet; | |
113 | struct sk_buff *skb; | |
114 | ||
115 | if (batman_if->if_status != IF_ACTIVE) | |
116 | return; | |
117 | ||
118 | packet_num = 0; | |
119 | buff_pos = 0; | |
120 | batman_packet = (struct batman_packet *)forw_packet->skb->data; | |
121 | ||
122 | /* adjust all flags and log packets */ | |
123 | while (aggregated_packet(buff_pos, | |
124 | forw_packet->packet_len, | |
125 | batman_packet->num_hna)) { | |
126 | ||
127 | /* we might have aggregated direct link packets with an | |
128 | * ordinary base packet */ | |
129 | if ((forw_packet->direct_link_flags & (1 << packet_num)) && | |
130 | (forw_packet->if_incoming == batman_if)) | |
131 | batman_packet->flags |= DIRECTLINK; | |
132 | else | |
133 | batman_packet->flags &= ~DIRECTLINK; | |
134 | ||
135 | fwd_str = (packet_num > 0 ? "Forwarding" : (forw_packet->own ? | |
136 | "Sending own" : | |
137 | "Forwarding")); | |
138 | bat_dbg(DBG_BATMAN, bat_priv, | |
139 | "%s %spacket (originator %pM, seqno %d, TQ %d, TTL %d," | |
140 | " IDF %s) on interface %s [%pM]\n", | |
141 | fwd_str, (packet_num > 0 ? "aggregated " : ""), | |
142 | batman_packet->orig, ntohl(batman_packet->seqno), | |
143 | batman_packet->tq, batman_packet->ttl, | |
144 | (batman_packet->flags & DIRECTLINK ? | |
145 | "on" : "off"), | |
146 | batman_if->net_dev->name, batman_if->net_dev->dev_addr); | |
147 | ||
148 | buff_pos += sizeof(struct batman_packet) + | |
149 | (batman_packet->num_hna * ETH_ALEN); | |
150 | packet_num++; | |
151 | batman_packet = (struct batman_packet *) | |
152 | (forw_packet->skb->data + buff_pos); | |
153 | } | |
154 | ||
155 | /* create clone because function is called more than once */ | |
156 | skb = skb_clone(forw_packet->skb, GFP_ATOMIC); | |
157 | if (skb) | |
158 | send_skb_packet(skb, batman_if, broadcast_addr); | |
159 | } | |
160 | ||
161 | /* send a batman packet */ | |
162 | static void send_packet(struct forw_packet *forw_packet) | |
163 | { | |
164 | struct batman_if *batman_if; | |
165 | struct net_device *soft_iface; | |
166 | struct bat_priv *bat_priv; | |
167 | struct batman_packet *batman_packet = | |
168 | (struct batman_packet *)(forw_packet->skb->data); | |
169 | unsigned char directlink = (batman_packet->flags & DIRECTLINK ? 1 : 0); | |
170 | ||
171 | if (!forw_packet->if_incoming) { | |
172 | pr_err("Error - can't forward packet: incoming iface not " | |
173 | "specified\n"); | |
174 | return; | |
175 | } | |
176 | ||
177 | soft_iface = forw_packet->if_incoming->soft_iface; | |
178 | bat_priv = netdev_priv(soft_iface); | |
179 | ||
180 | if (forw_packet->if_incoming->if_status != IF_ACTIVE) | |
181 | return; | |
182 | ||
183 | /* multihomed peer assumed */ | |
184 | /* non-primary OGMs are only broadcasted on their interface */ | |
185 | if ((directlink && (batman_packet->ttl == 1)) || | |
186 | (forw_packet->own && (forw_packet->if_incoming->if_num > 0))) { | |
187 | ||
188 | /* FIXME: what about aggregated packets ? */ | |
189 | bat_dbg(DBG_BATMAN, bat_priv, | |
190 | "%s packet (originator %pM, seqno %d, TTL %d) " | |
191 | "on interface %s [%pM]\n", | |
192 | (forw_packet->own ? "Sending own" : "Forwarding"), | |
193 | batman_packet->orig, ntohl(batman_packet->seqno), | |
194 | batman_packet->ttl, | |
195 | forw_packet->if_incoming->net_dev->name, | |
196 | forw_packet->if_incoming->net_dev->dev_addr); | |
197 | ||
198 | /* skb is only used once and than forw_packet is free'd */ | |
199 | send_skb_packet(forw_packet->skb, forw_packet->if_incoming, | |
200 | broadcast_addr); | |
201 | forw_packet->skb = NULL; | |
202 | ||
203 | return; | |
204 | } | |
205 | ||
206 | /* broadcast on every interface */ | |
207 | rcu_read_lock(); | |
208 | list_for_each_entry_rcu(batman_if, &if_list, list) { | |
209 | if (batman_if->soft_iface != soft_iface) | |
210 | continue; | |
211 | ||
212 | send_packet_to_if(forw_packet, batman_if); | |
213 | } | |
214 | rcu_read_unlock(); | |
215 | } | |
216 | ||
217 | static void rebuild_batman_packet(struct bat_priv *bat_priv, | |
218 | struct batman_if *batman_if) | |
219 | { | |
220 | int new_len; | |
221 | unsigned char *new_buff; | |
222 | struct batman_packet *batman_packet; | |
223 | ||
224 | new_len = sizeof(struct batman_packet) + | |
225 | (bat_priv->num_local_hna * ETH_ALEN); | |
226 | new_buff = kmalloc(new_len, GFP_ATOMIC); | |
227 | ||
228 | /* keep old buffer if kmalloc should fail */ | |
229 | if (new_buff) { | |
230 | memcpy(new_buff, batman_if->packet_buff, | |
231 | sizeof(struct batman_packet)); | |
232 | batman_packet = (struct batman_packet *)new_buff; | |
233 | ||
234 | batman_packet->num_hna = hna_local_fill_buffer(bat_priv, | |
235 | new_buff + sizeof(struct batman_packet), | |
236 | new_len - sizeof(struct batman_packet)); | |
237 | ||
238 | kfree(batman_if->packet_buff); | |
239 | batman_if->packet_buff = new_buff; | |
240 | batman_if->packet_len = new_len; | |
241 | } | |
242 | } | |
243 | ||
244 | void schedule_own_packet(struct batman_if *batman_if) | |
245 | { | |
246 | struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface); | |
247 | unsigned long send_time; | |
248 | struct batman_packet *batman_packet; | |
249 | int vis_server; | |
250 | ||
251 | if ((batman_if->if_status == IF_NOT_IN_USE) || | |
252 | (batman_if->if_status == IF_TO_BE_REMOVED)) | |
253 | return; | |
254 | ||
255 | vis_server = atomic_read(&bat_priv->vis_mode); | |
256 | ||
257 | /** | |
258 | * the interface gets activated here to avoid race conditions between | |
259 | * the moment of activating the interface in | |
260 | * hardif_activate_interface() where the originator mac is set and | |
261 | * outdated packets (especially uninitialized mac addresses) in the | |
262 | * packet queue | |
263 | */ | |
264 | if (batman_if->if_status == IF_TO_BE_ACTIVATED) | |
265 | batman_if->if_status = IF_ACTIVE; | |
266 | ||
267 | /* if local hna has changed and interface is a primary interface */ | |
268 | if ((atomic_read(&bat_priv->hna_local_changed)) && | |
269 | (batman_if == bat_priv->primary_if)) | |
270 | rebuild_batman_packet(bat_priv, batman_if); | |
271 | ||
272 | /** | |
273 | * NOTE: packet_buff might just have been re-allocated in | |
274 | * rebuild_batman_packet() | |
275 | */ | |
276 | batman_packet = (struct batman_packet *)batman_if->packet_buff; | |
277 | ||
278 | /* change sequence number to network order */ | |
279 | batman_packet->seqno = | |
280 | htonl((uint32_t)atomic_read(&batman_if->seqno)); | |
281 | ||
282 | if (vis_server == VIS_TYPE_SERVER_SYNC) | |
283 | batman_packet->flags |= VIS_SERVER; | |
284 | else | |
285 | batman_packet->flags &= ~VIS_SERVER; | |
286 | ||
287 | if ((batman_if == bat_priv->primary_if) && | |
288 | (atomic_read(&bat_priv->gw_mode) == GW_MODE_SERVER)) | |
289 | batman_packet->gw_flags = | |
290 | (uint8_t)atomic_read(&bat_priv->gw_bandwidth); | |
291 | else | |
292 | batman_packet->gw_flags = 0; | |
293 | ||
294 | atomic_inc(&batman_if->seqno); | |
295 | ||
296 | slide_own_bcast_window(batman_if); | |
297 | send_time = own_send_time(bat_priv); | |
298 | add_bat_packet_to_list(bat_priv, | |
299 | batman_if->packet_buff, | |
300 | batman_if->packet_len, | |
301 | batman_if, 1, send_time); | |
302 | } | |
303 | ||
304 | void schedule_forward_packet(struct orig_node *orig_node, | |
305 | struct ethhdr *ethhdr, | |
306 | struct batman_packet *batman_packet, | |
307 | uint8_t directlink, int hna_buff_len, | |
308 | struct batman_if *if_incoming) | |
309 | { | |
310 | struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface); | |
311 | unsigned char in_tq, in_ttl, tq_avg = 0; | |
312 | unsigned long send_time; | |
313 | ||
314 | if (batman_packet->ttl <= 1) { | |
315 | bat_dbg(DBG_BATMAN, bat_priv, "ttl exceeded\n"); | |
316 | return; | |
317 | } | |
318 | ||
319 | in_tq = batman_packet->tq; | |
320 | in_ttl = batman_packet->ttl; | |
321 | ||
322 | batman_packet->ttl--; | |
323 | memcpy(batman_packet->prev_sender, ethhdr->h_source, ETH_ALEN); | |
324 | ||
325 | /* rebroadcast tq of our best ranking neighbor to ensure the rebroadcast | |
326 | * of our best tq value */ | |
327 | if ((orig_node->router) && (orig_node->router->tq_avg != 0)) { | |
328 | ||
329 | /* rebroadcast ogm of best ranking neighbor as is */ | |
330 | if (!compare_orig(orig_node->router->addr, ethhdr->h_source)) { | |
331 | batman_packet->tq = orig_node->router->tq_avg; | |
332 | ||
333 | if (orig_node->router->last_ttl) | |
334 | batman_packet->ttl = orig_node->router->last_ttl | |
335 | - 1; | |
336 | } | |
337 | ||
338 | tq_avg = orig_node->router->tq_avg; | |
339 | } | |
340 | ||
341 | /* apply hop penalty */ | |
342 | batman_packet->tq = hop_penalty(batman_packet->tq, bat_priv); | |
343 | ||
344 | bat_dbg(DBG_BATMAN, bat_priv, | |
345 | "Forwarding packet: tq_orig: %i, tq_avg: %i, " | |
346 | "tq_forw: %i, ttl_orig: %i, ttl_forw: %i\n", | |
347 | in_tq, tq_avg, batman_packet->tq, in_ttl - 1, | |
348 | batman_packet->ttl); | |
349 | ||
350 | batman_packet->seqno = htonl(batman_packet->seqno); | |
351 | ||
352 | /* switch of primaries first hop flag when forwarding */ | |
353 | batman_packet->flags &= ~PRIMARIES_FIRST_HOP; | |
354 | if (directlink) | |
355 | batman_packet->flags |= DIRECTLINK; | |
356 | else | |
357 | batman_packet->flags &= ~DIRECTLINK; | |
358 | ||
74ef1153 | 359 | send_time = forward_send_time(); |
c6c8fea2 SE |
360 | add_bat_packet_to_list(bat_priv, |
361 | (unsigned char *)batman_packet, | |
362 | sizeof(struct batman_packet) + hna_buff_len, | |
363 | if_incoming, 0, send_time); | |
364 | } | |
365 | ||
366 | static void forw_packet_free(struct forw_packet *forw_packet) | |
367 | { | |
368 | if (forw_packet->skb) | |
369 | kfree_skb(forw_packet->skb); | |
370 | kfree(forw_packet); | |
371 | } | |
372 | ||
373 | static void _add_bcast_packet_to_list(struct bat_priv *bat_priv, | |
374 | struct forw_packet *forw_packet, | |
375 | unsigned long send_time) | |
376 | { | |
377 | INIT_HLIST_NODE(&forw_packet->list); | |
378 | ||
379 | /* add new packet to packet list */ | |
380 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); | |
381 | hlist_add_head(&forw_packet->list, &bat_priv->forw_bcast_list); | |
382 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
383 | ||
384 | /* start timer for this packet */ | |
385 | INIT_DELAYED_WORK(&forw_packet->delayed_work, | |
386 | send_outstanding_bcast_packet); | |
387 | queue_delayed_work(bat_event_workqueue, &forw_packet->delayed_work, | |
388 | send_time); | |
389 | } | |
390 | ||
391 | #define atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0) | |
392 | /* add a broadcast packet to the queue and setup timers. broadcast packets | |
393 | * are sent multiple times to increase probability for beeing received. | |
394 | * | |
395 | * This function returns NETDEV_TX_OK on success and NETDEV_TX_BUSY on | |
396 | * errors. | |
397 | * | |
398 | * The skb is not consumed, so the caller should make sure that the | |
399 | * skb is freed. */ | |
400 | int add_bcast_packet_to_list(struct bat_priv *bat_priv, struct sk_buff *skb) | |
401 | { | |
402 | struct forw_packet *forw_packet; | |
403 | struct bcast_packet *bcast_packet; | |
404 | ||
405 | if (!atomic_dec_not_zero(&bat_priv->bcast_queue_left)) { | |
406 | bat_dbg(DBG_BATMAN, bat_priv, "bcast packet queue full\n"); | |
407 | goto out; | |
408 | } | |
409 | ||
410 | if (!bat_priv->primary_if) | |
411 | goto out; | |
412 | ||
413 | forw_packet = kmalloc(sizeof(struct forw_packet), GFP_ATOMIC); | |
414 | ||
415 | if (!forw_packet) | |
416 | goto out_and_inc; | |
417 | ||
418 | skb = skb_copy(skb, GFP_ATOMIC); | |
419 | if (!skb) | |
420 | goto packet_free; | |
421 | ||
422 | /* as we have a copy now, it is safe to decrease the TTL */ | |
423 | bcast_packet = (struct bcast_packet *)skb->data; | |
424 | bcast_packet->ttl--; | |
425 | ||
426 | skb_reset_mac_header(skb); | |
427 | ||
428 | forw_packet->skb = skb; | |
429 | forw_packet->if_incoming = bat_priv->primary_if; | |
430 | ||
431 | /* how often did we send the bcast packet ? */ | |
432 | forw_packet->num_packets = 0; | |
433 | ||
434 | _add_bcast_packet_to_list(bat_priv, forw_packet, 1); | |
435 | return NETDEV_TX_OK; | |
436 | ||
437 | packet_free: | |
438 | kfree(forw_packet); | |
439 | out_and_inc: | |
440 | atomic_inc(&bat_priv->bcast_queue_left); | |
441 | out: | |
442 | return NETDEV_TX_BUSY; | |
443 | } | |
444 | ||
445 | static void send_outstanding_bcast_packet(struct work_struct *work) | |
446 | { | |
447 | struct batman_if *batman_if; | |
448 | struct delayed_work *delayed_work = | |
449 | container_of(work, struct delayed_work, work); | |
450 | struct forw_packet *forw_packet = | |
451 | container_of(delayed_work, struct forw_packet, delayed_work); | |
452 | struct sk_buff *skb1; | |
453 | struct net_device *soft_iface = forw_packet->if_incoming->soft_iface; | |
454 | struct bat_priv *bat_priv = netdev_priv(soft_iface); | |
455 | ||
456 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); | |
457 | hlist_del(&forw_packet->list); | |
458 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
459 | ||
460 | if (atomic_read(&bat_priv->mesh_state) == MESH_DEACTIVATING) | |
461 | goto out; | |
462 | ||
463 | /* rebroadcast packet */ | |
464 | rcu_read_lock(); | |
465 | list_for_each_entry_rcu(batman_if, &if_list, list) { | |
466 | if (batman_if->soft_iface != soft_iface) | |
467 | continue; | |
468 | ||
469 | /* send a copy of the saved skb */ | |
470 | skb1 = skb_clone(forw_packet->skb, GFP_ATOMIC); | |
471 | if (skb1) | |
472 | send_skb_packet(skb1, batman_if, broadcast_addr); | |
473 | } | |
474 | rcu_read_unlock(); | |
475 | ||
476 | forw_packet->num_packets++; | |
477 | ||
478 | /* if we still have some more bcasts to send */ | |
479 | if (forw_packet->num_packets < 3) { | |
480 | _add_bcast_packet_to_list(bat_priv, forw_packet, | |
481 | ((5 * HZ) / 1000)); | |
482 | return; | |
483 | } | |
484 | ||
485 | out: | |
486 | forw_packet_free(forw_packet); | |
487 | atomic_inc(&bat_priv->bcast_queue_left); | |
488 | } | |
489 | ||
490 | void send_outstanding_bat_packet(struct work_struct *work) | |
491 | { | |
492 | struct delayed_work *delayed_work = | |
493 | container_of(work, struct delayed_work, work); | |
494 | struct forw_packet *forw_packet = | |
495 | container_of(delayed_work, struct forw_packet, delayed_work); | |
496 | struct bat_priv *bat_priv; | |
497 | ||
498 | bat_priv = netdev_priv(forw_packet->if_incoming->soft_iface); | |
499 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
500 | hlist_del(&forw_packet->list); | |
501 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
502 | ||
503 | if (atomic_read(&bat_priv->mesh_state) == MESH_DEACTIVATING) | |
504 | goto out; | |
505 | ||
506 | send_packet(forw_packet); | |
507 | ||
508 | /** | |
509 | * we have to have at least one packet in the queue | |
510 | * to determine the queues wake up time unless we are | |
511 | * shutting down | |
512 | */ | |
513 | if (forw_packet->own) | |
514 | schedule_own_packet(forw_packet->if_incoming); | |
515 | ||
516 | out: | |
517 | /* don't count own packet */ | |
518 | if (!forw_packet->own) | |
519 | atomic_inc(&bat_priv->batman_queue_left); | |
520 | ||
521 | forw_packet_free(forw_packet); | |
522 | } | |
523 | ||
524 | void purge_outstanding_packets(struct bat_priv *bat_priv, | |
525 | struct batman_if *batman_if) | |
526 | { | |
527 | struct forw_packet *forw_packet; | |
528 | struct hlist_node *tmp_node, *safe_tmp_node; | |
529 | ||
530 | if (batman_if) | |
531 | bat_dbg(DBG_BATMAN, bat_priv, | |
532 | "purge_outstanding_packets(): %s\n", | |
533 | batman_if->net_dev->name); | |
534 | else | |
535 | bat_dbg(DBG_BATMAN, bat_priv, | |
536 | "purge_outstanding_packets()\n"); | |
537 | ||
538 | /* free bcast list */ | |
539 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); | |
540 | hlist_for_each_entry_safe(forw_packet, tmp_node, safe_tmp_node, | |
541 | &bat_priv->forw_bcast_list, list) { | |
542 | ||
543 | /** | |
544 | * if purge_outstanding_packets() was called with an argmument | |
545 | * we delete only packets belonging to the given interface | |
546 | */ | |
547 | if ((batman_if) && | |
548 | (forw_packet->if_incoming != batman_if)) | |
549 | continue; | |
550 | ||
551 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
552 | ||
553 | /** | |
554 | * send_outstanding_bcast_packet() will lock the list to | |
555 | * delete the item from the list | |
556 | */ | |
557 | cancel_delayed_work_sync(&forw_packet->delayed_work); | |
558 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); | |
559 | } | |
560 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
561 | ||
562 | /* free batman packet list */ | |
563 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
564 | hlist_for_each_entry_safe(forw_packet, tmp_node, safe_tmp_node, | |
565 | &bat_priv->forw_bat_list, list) { | |
566 | ||
567 | /** | |
568 | * if purge_outstanding_packets() was called with an argmument | |
569 | * we delete only packets belonging to the given interface | |
570 | */ | |
571 | if ((batman_if) && | |
572 | (forw_packet->if_incoming != batman_if)) | |
573 | continue; | |
574 | ||
575 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
576 | ||
577 | /** | |
578 | * send_outstanding_bat_packet() will lock the list to | |
579 | * delete the item from the list | |
580 | */ | |
581 | cancel_delayed_work_sync(&forw_packet->delayed_work); | |
582 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
583 | } | |
584 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
585 | } |