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0b873931 | 1 | /* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
2 | * |
3 | * Marek Lindner, Simon Wunderlich | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | * 02110-1301, USA | |
c6c8fea2 SE |
18 | */ |
19 | ||
20 | #include "main.h" | |
c384ea3e | 21 | #include "distributed-arp-table.h" |
c6c8fea2 SE |
22 | #include "send.h" |
23 | #include "routing.h" | |
24 | #include "translation-table.h" | |
25 | #include "soft-interface.h" | |
26 | #include "hard-interface.h" | |
c6c8fea2 | 27 | #include "gateway_common.h" |
f097e25d | 28 | #include "gateway_client.h" |
c6c8fea2 | 29 | #include "originator.h" |
612d2b4f | 30 | #include "network-coding.h" |
ee75ed88 | 31 | #include "fragmentation.h" |
af5d4f77 | 32 | |
bb079c82 | 33 | static void batadv_send_outstanding_bcast_packet(struct work_struct *work); |
c6c8fea2 | 34 | |
c6c8fea2 | 35 | /* send out an already prepared packet to the given address via the |
9cfc7bd6 SE |
36 | * specified batman interface |
37 | */ | |
56303d34 SE |
38 | int batadv_send_skb_packet(struct sk_buff *skb, |
39 | struct batadv_hard_iface *hard_iface, | |
9455e34c | 40 | const uint8_t *dst_addr) |
c6c8fea2 | 41 | { |
612d2b4f | 42 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
c6c8fea2 SE |
43 | struct ethhdr *ethhdr; |
44 | ||
e9a4f295 | 45 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
c6c8fea2 SE |
46 | goto send_skb_err; |
47 | ||
e6c10f43 | 48 | if (unlikely(!hard_iface->net_dev)) |
c6c8fea2 SE |
49 | goto send_skb_err; |
50 | ||
e6c10f43 | 51 | if (!(hard_iface->net_dev->flags & IFF_UP)) { |
67969581 SE |
52 | pr_warn("Interface %s is not up - can't send packet via that interface!\n", |
53 | hard_iface->net_dev->name); | |
c6c8fea2 SE |
54 | goto send_skb_err; |
55 | } | |
56 | ||
57 | /* push to the ethernet header. */ | |
04b482a2 | 58 | if (batadv_skb_head_push(skb, ETH_HLEN) < 0) |
c6c8fea2 SE |
59 | goto send_skb_err; |
60 | ||
61 | skb_reset_mac_header(skb); | |
62 | ||
7ed4be95 | 63 | ethhdr = eth_hdr(skb); |
e6c10f43 | 64 | memcpy(ethhdr->h_source, hard_iface->net_dev->dev_addr, ETH_ALEN); |
c6c8fea2 | 65 | memcpy(ethhdr->h_dest, dst_addr, ETH_ALEN); |
293e9338 | 66 | ethhdr->h_proto = htons(ETH_P_BATMAN); |
c6c8fea2 SE |
67 | |
68 | skb_set_network_header(skb, ETH_HLEN); | |
293e9338 | 69 | skb->protocol = htons(ETH_P_BATMAN); |
c6c8fea2 | 70 | |
e6c10f43 | 71 | skb->dev = hard_iface->net_dev; |
c6c8fea2 | 72 | |
612d2b4f MH |
73 | /* Save a clone of the skb to use when decoding coded packets */ |
74 | batadv_nc_skb_store_for_decoding(bat_priv, skb); | |
75 | ||
c6c8fea2 SE |
76 | /* dev_queue_xmit() returns a negative result on error. However on |
77 | * congestion and traffic shaping, it drops and returns NET_XMIT_DROP | |
9cfc7bd6 SE |
78 | * (which is > 0). This will not be treated as an error. |
79 | */ | |
c6c8fea2 SE |
80 | return dev_queue_xmit(skb); |
81 | send_skb_err: | |
82 | kfree_skb(skb); | |
83 | return NET_XMIT_DROP; | |
84 | } | |
85 | ||
bb351ba0 MH |
86 | /** |
87 | * batadv_send_skb_to_orig - Lookup next-hop and transmit skb. | |
88 | * @skb: Packet to be transmitted. | |
89 | * @orig_node: Final destination of the packet. | |
90 | * @recv_if: Interface used when receiving the packet (can be NULL). | |
91 | * | |
92 | * Looks up the best next-hop towards the passed originator and passes the | |
93 | * skb on for preparation of MAC header. If the packet originated from this | |
94 | * host, NULL can be passed as recv_if and no interface alternating is | |
95 | * attempted. | |
96 | * | |
e91ecfc6 MH |
97 | * Returns NET_XMIT_SUCCESS on success, NET_XMIT_DROP on failure, or |
98 | * NET_XMIT_POLICED if the skb is buffered for later transmit. | |
bb351ba0 | 99 | */ |
e91ecfc6 MH |
100 | int batadv_send_skb_to_orig(struct sk_buff *skb, |
101 | struct batadv_orig_node *orig_node, | |
102 | struct batadv_hard_iface *recv_if) | |
bb351ba0 MH |
103 | { |
104 | struct batadv_priv *bat_priv = orig_node->bat_priv; | |
105 | struct batadv_neigh_node *neigh_node; | |
e91ecfc6 | 106 | int ret = NET_XMIT_DROP; |
bb351ba0 MH |
107 | |
108 | /* batadv_find_router() increases neigh_nodes refcount if found. */ | |
109 | neigh_node = batadv_find_router(bat_priv, orig_node, recv_if); | |
110 | if (!neigh_node) | |
ee75ed88 MH |
111 | goto out; |
112 | ||
113 | /* Check if the skb is too large to send in one piece and fragment | |
114 | * it if needed. | |
115 | */ | |
116 | if (atomic_read(&bat_priv->fragmentation) && | |
117 | skb->len > neigh_node->if_incoming->net_dev->mtu) { | |
118 | /* Fragment and send packet. */ | |
119 | if (batadv_frag_send_packet(skb, orig_node, neigh_node)) | |
120 | ret = NET_XMIT_SUCCESS; | |
121 | ||
122 | goto out; | |
123 | } | |
bb351ba0 | 124 | |
e91ecfc6 MH |
125 | /* try to network code the packet, if it is received on an interface |
126 | * (i.e. being forwarded). If the packet originates from this node or if | |
127 | * network coding fails, then send the packet as usual. | |
128 | */ | |
129 | if (recv_if && batadv_nc_skb_forward(skb, neigh_node)) { | |
130 | ret = NET_XMIT_POLICED; | |
131 | } else { | |
132 | batadv_send_skb_packet(skb, neigh_node->if_incoming, | |
133 | neigh_node->addr); | |
134 | ret = NET_XMIT_SUCCESS; | |
135 | } | |
bb351ba0 | 136 | |
ee75ed88 MH |
137 | out: |
138 | if (neigh_node) | |
139 | batadv_neigh_node_free_ref(neigh_node); | |
bb351ba0 | 140 | |
e91ecfc6 | 141 | return ret; |
bb351ba0 MH |
142 | } |
143 | ||
f097e25d MH |
144 | /** |
145 | * batadv_send_skb_push_fill_unicast - extend the buffer and initialize the | |
146 | * common fields for unicast packets | |
147 | * @skb: the skb carrying the unicast header to initialize | |
148 | * @hdr_size: amount of bytes to push at the beginning of the skb | |
149 | * @orig_node: the destination node | |
150 | * | |
151 | * Returns false if the buffer extension was not possible or true otherwise. | |
152 | */ | |
153 | static bool | |
154 | batadv_send_skb_push_fill_unicast(struct sk_buff *skb, int hdr_size, | |
155 | struct batadv_orig_node *orig_node) | |
156 | { | |
157 | struct batadv_unicast_packet *unicast_packet; | |
158 | uint8_t ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
159 | ||
160 | if (batadv_skb_head_push(skb, hdr_size) < 0) | |
161 | return false; | |
162 | ||
163 | unicast_packet = (struct batadv_unicast_packet *)skb->data; | |
164 | unicast_packet->header.version = BATADV_COMPAT_VERSION; | |
165 | /* batman packet type: unicast */ | |
166 | unicast_packet->header.packet_type = BATADV_UNICAST; | |
167 | /* set unicast ttl */ | |
168 | unicast_packet->header.ttl = BATADV_TTL; | |
169 | /* copy the destination for faster routing */ | |
170 | memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN); | |
171 | /* set the destination tt version number */ | |
172 | unicast_packet->ttvn = ttvn; | |
173 | ||
174 | return true; | |
175 | } | |
176 | ||
177 | /** | |
178 | * batadv_send_skb_prepare_unicast - encapsulate an skb with a unicast header | |
179 | * @skb: the skb containing the payload to encapsulate | |
180 | * @orig_node: the destination node | |
181 | * | |
182 | * Returns false if the payload could not be encapsulated or true otherwise. | |
183 | */ | |
184 | static bool batadv_send_skb_prepare_unicast(struct sk_buff *skb, | |
185 | struct batadv_orig_node *orig_node) | |
186 | { | |
187 | size_t uni_size = sizeof(struct batadv_unicast_packet); | |
188 | ||
189 | return batadv_send_skb_push_fill_unicast(skb, uni_size, orig_node); | |
190 | } | |
191 | ||
192 | /** | |
193 | * batadv_send_skb_prepare_unicast_4addr - encapsulate an skb with a | |
194 | * unicast 4addr header | |
195 | * @bat_priv: the bat priv with all the soft interface information | |
196 | * @skb: the skb containing the payload to encapsulate | |
197 | * @orig_node: the destination node | |
198 | * @packet_subtype: the unicast 4addr packet subtype to use | |
199 | * | |
200 | * Returns false if the payload could not be encapsulated or true otherwise. | |
201 | */ | |
202 | bool batadv_send_skb_prepare_unicast_4addr(struct batadv_priv *bat_priv, | |
203 | struct sk_buff *skb, | |
204 | struct batadv_orig_node *orig, | |
205 | int packet_subtype) | |
206 | { | |
207 | struct batadv_hard_iface *primary_if; | |
208 | struct batadv_unicast_4addr_packet *uc_4addr_packet; | |
209 | bool ret = false; | |
210 | ||
211 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
212 | if (!primary_if) | |
213 | goto out; | |
214 | ||
215 | /* Pull the header space and fill the unicast_packet substructure. | |
216 | * We can do that because the first member of the uc_4addr_packet | |
217 | * is of type struct unicast_packet | |
218 | */ | |
219 | if (!batadv_send_skb_push_fill_unicast(skb, sizeof(*uc_4addr_packet), | |
220 | orig)) | |
221 | goto out; | |
222 | ||
223 | uc_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data; | |
224 | uc_4addr_packet->u.header.packet_type = BATADV_UNICAST_4ADDR; | |
225 | memcpy(uc_4addr_packet->src, primary_if->net_dev->dev_addr, ETH_ALEN); | |
226 | uc_4addr_packet->subtype = packet_subtype; | |
227 | uc_4addr_packet->reserved = 0; | |
228 | ||
229 | ret = true; | |
230 | out: | |
231 | if (primary_if) | |
232 | batadv_hardif_free_ref(primary_if); | |
233 | return ret; | |
234 | } | |
235 | ||
236 | /** | |
237 | * batadv_send_generic_unicast_skb - send an skb as unicast | |
238 | * @bat_priv: the bat priv with all the soft interface information | |
239 | * @skb: payload to send | |
240 | * @packet_type: the batman unicast packet type to use | |
241 | * @packet_subtype: the unicast 4addr packet subtype (only relevant for unicast | |
242 | * 4addr packets) | |
243 | * | |
244 | * Returns 1 in case of error or 0 otherwise. | |
245 | */ | |
246 | int batadv_send_skb_generic_unicast(struct batadv_priv *bat_priv, | |
247 | struct sk_buff *skb, int packet_type, | |
248 | int packet_subtype) | |
249 | { | |
250 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; | |
251 | struct batadv_unicast_packet *unicast_packet; | |
252 | struct batadv_orig_node *orig_node; | |
f097e25d MH |
253 | int ret = NET_RX_DROP; |
254 | ||
255 | /* get routing information */ | |
56a5ca84 | 256 | if (is_multicast_ether_addr(ethhdr->h_dest)) |
f097e25d | 257 | orig_node = batadv_gw_get_selected_orig(bat_priv); |
56a5ca84 SW |
258 | else |
259 | /* check for tt host - increases orig_node refcount. | |
260 | * returns NULL in case of AP isolation | |
261 | */ | |
262 | orig_node = batadv_transtable_search(bat_priv, ethhdr->h_source, | |
263 | ethhdr->h_dest); | |
f097e25d | 264 | |
56a5ca84 | 265 | if (!orig_node) |
f097e25d MH |
266 | goto out; |
267 | ||
268 | switch (packet_type) { | |
269 | case BATADV_UNICAST: | |
33faa045 AQ |
270 | if (!batadv_send_skb_prepare_unicast(skb, orig_node)) |
271 | goto out; | |
f097e25d MH |
272 | break; |
273 | case BATADV_UNICAST_4ADDR: | |
33faa045 AQ |
274 | if (!batadv_send_skb_prepare_unicast_4addr(bat_priv, skb, |
275 | orig_node, | |
276 | packet_subtype)) | |
277 | goto out; | |
f097e25d MH |
278 | break; |
279 | default: | |
280 | /* this function supports UNICAST and UNICAST_4ADDR only. It | |
281 | * should never be invoked with any other packet type | |
282 | */ | |
283 | goto out; | |
284 | } | |
285 | ||
286 | unicast_packet = (struct batadv_unicast_packet *)skb->data; | |
287 | ||
288 | /* inform the destination node that we are still missing a correct route | |
289 | * for this client. The destination will receive this packet and will | |
290 | * try to reroute it because the ttvn contained in the header is less | |
291 | * than the current one | |
292 | */ | |
293 | if (batadv_tt_global_client_is_roaming(bat_priv, ethhdr->h_dest)) | |
294 | unicast_packet->ttvn = unicast_packet->ttvn - 1; | |
295 | ||
296 | if (batadv_send_skb_to_orig(skb, orig_node, NULL) != NET_XMIT_DROP) | |
297 | ret = 0; | |
298 | ||
299 | out: | |
f097e25d MH |
300 | if (orig_node) |
301 | batadv_orig_node_free_ref(orig_node); | |
302 | if (ret == NET_RX_DROP) | |
303 | kfree_skb(skb); | |
304 | return ret; | |
305 | } | |
306 | ||
56303d34 | 307 | void batadv_schedule_bat_ogm(struct batadv_hard_iface *hard_iface) |
c6c8fea2 | 308 | { |
56303d34 | 309 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
c6c8fea2 | 310 | |
e9a4f295 SE |
311 | if ((hard_iface->if_status == BATADV_IF_NOT_IN_USE) || |
312 | (hard_iface->if_status == BATADV_IF_TO_BE_REMOVED)) | |
c6c8fea2 SE |
313 | return; |
314 | ||
9cfc7bd6 | 315 | /* the interface gets activated here to avoid race conditions between |
c6c8fea2 SE |
316 | * the moment of activating the interface in |
317 | * hardif_activate_interface() where the originator mac is set and | |
318 | * outdated packets (especially uninitialized mac addresses) in the | |
319 | * packet queue | |
320 | */ | |
e9a4f295 SE |
321 | if (hard_iface->if_status == BATADV_IF_TO_BE_ACTIVATED) |
322 | hard_iface->if_status = BATADV_IF_ACTIVE; | |
c6c8fea2 | 323 | |
be9aa4c1 | 324 | bat_priv->bat_algo_ops->bat_ogm_schedule(hard_iface); |
c6c8fea2 SE |
325 | } |
326 | ||
56303d34 | 327 | static void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet) |
c6c8fea2 SE |
328 | { |
329 | if (forw_packet->skb) | |
330 | kfree_skb(forw_packet->skb); | |
6d5808d4 | 331 | if (forw_packet->if_incoming) |
e5d89254 | 332 | batadv_hardif_free_ref(forw_packet->if_incoming); |
c6c8fea2 SE |
333 | kfree(forw_packet); |
334 | } | |
335 | ||
56303d34 SE |
336 | static void |
337 | _batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, | |
338 | struct batadv_forw_packet *forw_packet, | |
339 | unsigned long send_time) | |
c6c8fea2 | 340 | { |
c6c8fea2 SE |
341 | /* add new packet to packet list */ |
342 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); | |
343 | hlist_add_head(&forw_packet->list, &bat_priv->forw_bcast_list); | |
344 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
345 | ||
346 | /* start timer for this packet */ | |
3193e8fd | 347 | queue_delayed_work(batadv_event_workqueue, &forw_packet->delayed_work, |
c6c8fea2 SE |
348 | send_time); |
349 | } | |
350 | ||
c6c8fea2 | 351 | /* add a broadcast packet to the queue and setup timers. broadcast packets |
015758d0 | 352 | * are sent multiple times to increase probability for being received. |
c6c8fea2 SE |
353 | * |
354 | * This function returns NETDEV_TX_OK on success and NETDEV_TX_BUSY on | |
355 | * errors. | |
356 | * | |
357 | * The skb is not consumed, so the caller should make sure that the | |
9cfc7bd6 SE |
358 | * skb is freed. |
359 | */ | |
56303d34 | 360 | int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, |
9455e34c SE |
361 | const struct sk_buff *skb, |
362 | unsigned long delay) | |
c6c8fea2 | 363 | { |
56303d34 SE |
364 | struct batadv_hard_iface *primary_if = NULL; |
365 | struct batadv_forw_packet *forw_packet; | |
96412690 | 366 | struct batadv_bcast_packet *bcast_packet; |
747e4221 | 367 | struct sk_buff *newskb; |
c6c8fea2 | 368 | |
3e34819e | 369 | if (!batadv_atomic_dec_not_zero(&bat_priv->bcast_queue_left)) { |
39c75a51 SE |
370 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
371 | "bcast packet queue full\n"); | |
c6c8fea2 SE |
372 | goto out; |
373 | } | |
374 | ||
e5d89254 | 375 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 376 | if (!primary_if) |
ca06c6eb | 377 | goto out_and_inc; |
c6c8fea2 | 378 | |
704509b8 | 379 | forw_packet = kmalloc(sizeof(*forw_packet), GFP_ATOMIC); |
c6c8fea2 SE |
380 | |
381 | if (!forw_packet) | |
382 | goto out_and_inc; | |
383 | ||
747e4221 SE |
384 | newskb = skb_copy(skb, GFP_ATOMIC); |
385 | if (!newskb) | |
c6c8fea2 SE |
386 | goto packet_free; |
387 | ||
388 | /* as we have a copy now, it is safe to decrease the TTL */ | |
96412690 | 389 | bcast_packet = (struct batadv_bcast_packet *)newskb->data; |
76543d14 | 390 | bcast_packet->header.ttl--; |
c6c8fea2 | 391 | |
747e4221 | 392 | skb_reset_mac_header(newskb); |
c6c8fea2 | 393 | |
747e4221 | 394 | forw_packet->skb = newskb; |
32ae9b22 | 395 | forw_packet->if_incoming = primary_if; |
c6c8fea2 SE |
396 | |
397 | /* how often did we send the bcast packet ? */ | |
398 | forw_packet->num_packets = 0; | |
399 | ||
72414442 AQ |
400 | INIT_DELAYED_WORK(&forw_packet->delayed_work, |
401 | batadv_send_outstanding_bcast_packet); | |
402 | ||
bb079c82 | 403 | _batadv_add_bcast_packet_to_list(bat_priv, forw_packet, delay); |
c6c8fea2 SE |
404 | return NETDEV_TX_OK; |
405 | ||
406 | packet_free: | |
407 | kfree(forw_packet); | |
408 | out_and_inc: | |
409 | atomic_inc(&bat_priv->bcast_queue_left); | |
410 | out: | |
32ae9b22 | 411 | if (primary_if) |
e5d89254 | 412 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
413 | return NETDEV_TX_BUSY; |
414 | } | |
415 | ||
bb079c82 | 416 | static void batadv_send_outstanding_bcast_packet(struct work_struct *work) |
c6c8fea2 | 417 | { |
56303d34 | 418 | struct batadv_hard_iface *hard_iface; |
bbb1f90e | 419 | struct delayed_work *delayed_work; |
56303d34 | 420 | struct batadv_forw_packet *forw_packet; |
c6c8fea2 | 421 | struct sk_buff *skb1; |
56303d34 SE |
422 | struct net_device *soft_iface; |
423 | struct batadv_priv *bat_priv; | |
424 | ||
bbb1f90e | 425 | delayed_work = container_of(work, struct delayed_work, work); |
56303d34 SE |
426 | forw_packet = container_of(delayed_work, struct batadv_forw_packet, |
427 | delayed_work); | |
428 | soft_iface = forw_packet->if_incoming->soft_iface; | |
429 | bat_priv = netdev_priv(soft_iface); | |
c6c8fea2 SE |
430 | |
431 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); | |
432 | hlist_del(&forw_packet->list); | |
433 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
434 | ||
39c75a51 | 435 | if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) |
c6c8fea2 SE |
436 | goto out; |
437 | ||
c384ea3e AQ |
438 | if (batadv_dat_drop_broadcast_packet(bat_priv, forw_packet)) |
439 | goto out; | |
440 | ||
c6c8fea2 SE |
441 | /* rebroadcast packet */ |
442 | rcu_read_lock(); | |
3193e8fd | 443 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e6c10f43 | 444 | if (hard_iface->soft_iface != soft_iface) |
c6c8fea2 SE |
445 | continue; |
446 | ||
caf65bfc MS |
447 | if (forw_packet->num_packets >= hard_iface->num_bcasts) |
448 | continue; | |
449 | ||
c6c8fea2 SE |
450 | /* send a copy of the saved skb */ |
451 | skb1 = skb_clone(forw_packet->skb, GFP_ATOMIC); | |
452 | if (skb1) | |
9455e34c | 453 | batadv_send_skb_packet(skb1, hard_iface, |
3193e8fd | 454 | batadv_broadcast_addr); |
c6c8fea2 SE |
455 | } |
456 | rcu_read_unlock(); | |
457 | ||
458 | forw_packet->num_packets++; | |
459 | ||
460 | /* if we still have some more bcasts to send */ | |
caf65bfc | 461 | if (forw_packet->num_packets < BATADV_NUM_BCASTS_MAX) { |
bb079c82 SE |
462 | _batadv_add_bcast_packet_to_list(bat_priv, forw_packet, |
463 | msecs_to_jiffies(5)); | |
c6c8fea2 SE |
464 | return; |
465 | } | |
466 | ||
467 | out: | |
bb079c82 | 468 | batadv_forw_packet_free(forw_packet); |
c6c8fea2 SE |
469 | atomic_inc(&bat_priv->bcast_queue_left); |
470 | } | |
471 | ||
9455e34c | 472 | void batadv_send_outstanding_bat_ogm_packet(struct work_struct *work) |
c6c8fea2 | 473 | { |
bbb1f90e | 474 | struct delayed_work *delayed_work; |
56303d34 SE |
475 | struct batadv_forw_packet *forw_packet; |
476 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 477 | |
bbb1f90e | 478 | delayed_work = container_of(work, struct delayed_work, work); |
56303d34 SE |
479 | forw_packet = container_of(delayed_work, struct batadv_forw_packet, |
480 | delayed_work); | |
c6c8fea2 SE |
481 | bat_priv = netdev_priv(forw_packet->if_incoming->soft_iface); |
482 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
483 | hlist_del(&forw_packet->list); | |
484 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
485 | ||
39c75a51 | 486 | if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) |
c6c8fea2 SE |
487 | goto out; |
488 | ||
01c4224b | 489 | bat_priv->bat_algo_ops->bat_ogm_emit(forw_packet); |
c6c8fea2 | 490 | |
9cfc7bd6 | 491 | /* we have to have at least one packet in the queue |
c6c8fea2 SE |
492 | * to determine the queues wake up time unless we are |
493 | * shutting down | |
494 | */ | |
495 | if (forw_packet->own) | |
9455e34c | 496 | batadv_schedule_bat_ogm(forw_packet->if_incoming); |
c6c8fea2 SE |
497 | |
498 | out: | |
499 | /* don't count own packet */ | |
500 | if (!forw_packet->own) | |
501 | atomic_inc(&bat_priv->batman_queue_left); | |
502 | ||
bb079c82 | 503 | batadv_forw_packet_free(forw_packet); |
c6c8fea2 SE |
504 | } |
505 | ||
56303d34 SE |
506 | void |
507 | batadv_purge_outstanding_packets(struct batadv_priv *bat_priv, | |
508 | const struct batadv_hard_iface *hard_iface) | |
c6c8fea2 | 509 | { |
56303d34 | 510 | struct batadv_forw_packet *forw_packet; |
b67bfe0d | 511 | struct hlist_node *safe_tmp_node; |
6d5808d4 | 512 | bool pending; |
c6c8fea2 | 513 | |
e6c10f43 | 514 | if (hard_iface) |
39c75a51 | 515 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
516 | "purge_outstanding_packets(): %s\n", |
517 | hard_iface->net_dev->name); | |
c6c8fea2 | 518 | else |
39c75a51 | 519 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 520 | "purge_outstanding_packets()\n"); |
c6c8fea2 SE |
521 | |
522 | /* free bcast list */ | |
523 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); | |
b67bfe0d | 524 | hlist_for_each_entry_safe(forw_packet, safe_tmp_node, |
c6c8fea2 | 525 | &bat_priv->forw_bcast_list, list) { |
9cfc7bd6 | 526 | /* if purge_outstanding_packets() was called with an argument |
c6c8fea2 SE |
527 | * we delete only packets belonging to the given interface |
528 | */ | |
e6c10f43 ML |
529 | if ((hard_iface) && |
530 | (forw_packet->if_incoming != hard_iface)) | |
c6c8fea2 SE |
531 | continue; |
532 | ||
533 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
534 | ||
bb079c82 | 535 | /* batadv_send_outstanding_bcast_packet() will lock the list to |
c6c8fea2 SE |
536 | * delete the item from the list |
537 | */ | |
6d5808d4 | 538 | pending = cancel_delayed_work_sync(&forw_packet->delayed_work); |
c6c8fea2 | 539 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); |
6d5808d4 SE |
540 | |
541 | if (pending) { | |
542 | hlist_del(&forw_packet->list); | |
bb079c82 | 543 | batadv_forw_packet_free(forw_packet); |
6d5808d4 | 544 | } |
c6c8fea2 SE |
545 | } |
546 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); | |
547 | ||
548 | /* free batman packet list */ | |
549 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
b67bfe0d | 550 | hlist_for_each_entry_safe(forw_packet, safe_tmp_node, |
c6c8fea2 | 551 | &bat_priv->forw_bat_list, list) { |
9cfc7bd6 | 552 | /* if purge_outstanding_packets() was called with an argument |
c6c8fea2 SE |
553 | * we delete only packets belonging to the given interface |
554 | */ | |
e6c10f43 ML |
555 | if ((hard_iface) && |
556 | (forw_packet->if_incoming != hard_iface)) | |
c6c8fea2 SE |
557 | continue; |
558 | ||
559 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
560 | ||
9cfc7bd6 | 561 | /* send_outstanding_bat_packet() will lock the list to |
c6c8fea2 SE |
562 | * delete the item from the list |
563 | */ | |
6d5808d4 | 564 | pending = cancel_delayed_work_sync(&forw_packet->delayed_work); |
c6c8fea2 | 565 | spin_lock_bh(&bat_priv->forw_bat_list_lock); |
6d5808d4 SE |
566 | |
567 | if (pending) { | |
568 | hlist_del(&forw_packet->list); | |
bb079c82 | 569 | batadv_forw_packet_free(forw_packet); |
6d5808d4 | 570 | } |
c6c8fea2 SE |
571 | } |
572 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
573 | } |