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5beef3c9 | 1 | /* |
9b6d10b7 | 2 | * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors: |
5beef3c9 AL |
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 "hard-interface.h" | |
5beef3c9 AL |
24 | #include "soft-interface.h" |
25 | #include "send.h" | |
26 | #include "translation-table.h" | |
27 | #include "routing.h" | |
208e13e4 ML |
28 | #include "bat_sysfs.h" |
29 | #include "originator.h" | |
5beef3c9 | 30 | #include "hash.h" |
5beef3c9 | 31 | |
208e13e4 | 32 | #include <linux/if_arp.h> |
5beef3c9 | 33 | |
208e13e4 | 34 | #define MIN(x, y) ((x) < (y) ? (x) : (y)) |
5beef3c9 | 35 | |
208e13e4 | 36 | struct batman_if *get_batman_if_by_netdev(struct net_device *net_dev) |
5beef3c9 AL |
37 | { |
38 | struct batman_if *batman_if; | |
39 | ||
40 | rcu_read_lock(); | |
41 | list_for_each_entry_rcu(batman_if, &if_list, list) { | |
208e13e4 | 42 | if (batman_if->net_dev == net_dev) |
5beef3c9 AL |
43 | goto out; |
44 | } | |
45 | ||
46 | batman_if = NULL; | |
47 | ||
48 | out: | |
49 | rcu_read_unlock(); | |
50 | return batman_if; | |
51 | } | |
52 | ||
208e13e4 ML |
53 | static int is_valid_iface(struct net_device *net_dev) |
54 | { | |
55 | if (net_dev->flags & IFF_LOOPBACK) | |
56 | return 0; | |
57 | ||
58 | if (net_dev->type != ARPHRD_ETHER) | |
59 | return 0; | |
60 | ||
61 | if (net_dev->addr_len != ETH_ALEN) | |
62 | return 0; | |
63 | ||
64 | /* no batman over batman */ | |
65 | #ifdef HAVE_NET_DEVICE_OPS | |
66 | if (net_dev->netdev_ops->ndo_start_xmit == interface_tx) | |
67 | return 0; | |
68 | #else | |
69 | if (net_dev->hard_start_xmit == interface_tx) | |
70 | return 0; | |
71 | #endif | |
72 | ||
73 | /* Device is being bridged */ | |
f350a0a8 | 74 | /* if (net_dev->priv_flags & IFF_BRIDGE_PORT) |
208e13e4 ML |
75 | return 0; */ |
76 | ||
77 | return 1; | |
78 | } | |
79 | ||
80 | static struct batman_if *get_active_batman_if(void) | |
5beef3c9 AL |
81 | { |
82 | struct batman_if *batman_if; | |
5beef3c9 | 83 | |
208e13e4 | 84 | /* TODO: should check interfaces belonging to bat_priv */ |
5beef3c9 AL |
85 | rcu_read_lock(); |
86 | list_for_each_entry_rcu(batman_if, &if_list, list) { | |
208e13e4 ML |
87 | if (batman_if->if_status == IF_ACTIVE) |
88 | goto out; | |
5beef3c9 | 89 | } |
208e13e4 ML |
90 | |
91 | batman_if = NULL; | |
92 | ||
93 | out: | |
5beef3c9 | 94 | rcu_read_unlock(); |
208e13e4 ML |
95 | return batman_if; |
96 | } | |
5beef3c9 | 97 | |
208e13e4 ML |
98 | static void set_primary_if(struct bat_priv *bat_priv, |
99 | struct batman_if *batman_if) | |
100 | { | |
101 | struct batman_packet *batman_packet; | |
102 | ||
103 | bat_priv->primary_if = batman_if; | |
104 | ||
105 | if (!bat_priv->primary_if) | |
106 | return; | |
107 | ||
108 | set_main_if_addr(batman_if->net_dev->dev_addr); | |
109 | ||
110 | batman_packet = (struct batman_packet *)(batman_if->packet_buff); | |
e35fd5ec | 111 | batman_packet->flags = PRIMARIES_FIRST_HOP; |
208e13e4 ML |
112 | batman_packet->ttl = TTL; |
113 | ||
114 | /*** | |
115 | * hacky trick to make sure that we send the HNA information via | |
116 | * our new primary interface | |
117 | */ | |
118 | atomic_set(&hna_local_changed, 1); | |
119 | } | |
120 | ||
121 | static bool hardif_is_iface_up(struct batman_if *batman_if) | |
122 | { | |
123 | if (batman_if->net_dev->flags & IFF_UP) | |
124 | return true; | |
125 | ||
126 | return false; | |
127 | } | |
128 | ||
129 | static void update_mac_addresses(struct batman_if *batman_if) | |
130 | { | |
f86b9984 SE |
131 | if (!batman_if || !batman_if->packet_buff) |
132 | return; | |
133 | ||
208e13e4 ML |
134 | addr_to_string(batman_if->addr_str, batman_if->net_dev->dev_addr); |
135 | ||
136 | memcpy(((struct batman_packet *)(batman_if->packet_buff))->orig, | |
137 | batman_if->net_dev->dev_addr, ETH_ALEN); | |
138 | memcpy(((struct batman_packet *)(batman_if->packet_buff))->prev_sender, | |
139 | batman_if->net_dev->dev_addr, ETH_ALEN); | |
5beef3c9 AL |
140 | } |
141 | ||
142 | static void check_known_mac_addr(uint8_t *addr) | |
143 | { | |
144 | struct batman_if *batman_if; | |
5beef3c9 AL |
145 | |
146 | rcu_read_lock(); | |
147 | list_for_each_entry_rcu(batman_if, &if_list, list) { | |
208e13e4 ML |
148 | if ((batman_if->if_status != IF_ACTIVE) && |
149 | (batman_if->if_status != IF_TO_BE_ACTIVATED)) | |
5beef3c9 AL |
150 | continue; |
151 | ||
152 | if (!compare_orig(batman_if->net_dev->dev_addr, addr)) | |
153 | continue; | |
154 | ||
c1641862 SE |
155 | pr_warning("The newly added mac address (%pM) already exists " |
156 | "on: %s\n", addr, batman_if->dev); | |
157 | pr_warning("It is strongly recommended to keep mac addresses " | |
158 | "unique to avoid problems!\n"); | |
5beef3c9 AL |
159 | } |
160 | rcu_read_unlock(); | |
161 | } | |
162 | ||
208e13e4 ML |
163 | int hardif_min_mtu(void) |
164 | { | |
165 | struct batman_if *batman_if; | |
166 | /* allow big frames if all devices are capable to do so | |
167 | * (have MTU > 1500 + BAT_HEADER_LEN) */ | |
168 | int min_mtu = ETH_DATA_LEN; | |
169 | ||
170 | rcu_read_lock(); | |
171 | list_for_each_entry_rcu(batman_if, &if_list, list) { | |
172 | if ((batman_if->if_status == IF_ACTIVE) || | |
173 | (batman_if->if_status == IF_TO_BE_ACTIVATED)) | |
174 | min_mtu = MIN(batman_if->net_dev->mtu - BAT_HEADER_LEN, | |
175 | min_mtu); | |
176 | } | |
177 | rcu_read_unlock(); | |
178 | ||
179 | return min_mtu; | |
180 | } | |
181 | ||
5beef3c9 AL |
182 | /* adjusts the MTU if a new interface with a smaller MTU appeared. */ |
183 | void update_min_mtu(void) | |
184 | { | |
185 | int min_mtu; | |
186 | ||
187 | min_mtu = hardif_min_mtu(); | |
188 | if (soft_device->mtu != min_mtu) | |
189 | soft_device->mtu = min_mtu; | |
190 | } | |
191 | ||
c1641862 SE |
192 | static void hardif_activate_interface(struct net_device *net_dev, |
193 | struct bat_priv *bat_priv, | |
208e13e4 | 194 | struct batman_if *batman_if) |
5beef3c9 | 195 | { |
208e13e4 ML |
196 | if (batman_if->if_status != IF_INACTIVE) |
197 | return; | |
5beef3c9 | 198 | |
208e13e4 ML |
199 | update_mac_addresses(batman_if); |
200 | batman_if->if_status = IF_TO_BE_ACTIVATED; | |
5beef3c9 | 201 | |
208e13e4 ML |
202 | /** |
203 | * the first active interface becomes our primary interface or | |
204 | * the next active interface after the old primay interface was removed | |
205 | */ | |
206 | if (!bat_priv->primary_if) | |
207 | set_primary_if(bat_priv, batman_if); | |
5beef3c9 | 208 | |
c1641862 | 209 | bat_info(net_dev, "Interface activated: %s\n", batman_if->dev); |
5beef3c9 | 210 | |
208e13e4 ML |
211 | if (atomic_read(&module_state) == MODULE_INACTIVE) |
212 | activate_module(); | |
5beef3c9 | 213 | |
208e13e4 ML |
214 | update_min_mtu(); |
215 | return; | |
5beef3c9 AL |
216 | } |
217 | ||
c1641862 SE |
218 | static void hardif_deactivate_interface(struct net_device *net_dev, |
219 | struct batman_if *batman_if) | |
5beef3c9 | 220 | { |
208e13e4 ML |
221 | if ((batman_if->if_status != IF_ACTIVE) && |
222 | (batman_if->if_status != IF_TO_BE_ACTIVATED)) | |
5beef3c9 AL |
223 | return; |
224 | ||
208e13e4 | 225 | batman_if->if_status = IF_INACTIVE; |
5beef3c9 | 226 | |
c1641862 | 227 | bat_info(net_dev, "Interface deactivated: %s\n", batman_if->dev); |
208e13e4 ML |
228 | |
229 | update_min_mtu(); | |
5beef3c9 AL |
230 | } |
231 | ||
208e13e4 | 232 | int hardif_enable_interface(struct batman_if *batman_if) |
5beef3c9 | 233 | { |
208e13e4 ML |
234 | /* FIXME: each batman_if will be attached to a softif */ |
235 | struct bat_priv *bat_priv = netdev_priv(soft_device); | |
236 | struct batman_packet *batman_packet; | |
5beef3c9 | 237 | |
208e13e4 ML |
238 | if (batman_if->if_status != IF_NOT_IN_USE) |
239 | goto out; | |
5beef3c9 | 240 | |
208e13e4 ML |
241 | batman_if->packet_len = BAT_PACKET_LEN; |
242 | batman_if->packet_buff = kmalloc(batman_if->packet_len, GFP_ATOMIC); | |
5beef3c9 | 243 | |
208e13e4 | 244 | if (!batman_if->packet_buff) { |
c1641862 SE |
245 | bat_err(soft_device, "Can't add interface packet (%s): " |
246 | "out of memory\n", batman_if->dev); | |
208e13e4 ML |
247 | goto err; |
248 | } | |
5beef3c9 | 249 | |
208e13e4 ML |
250 | batman_packet = (struct batman_packet *)(batman_if->packet_buff); |
251 | batman_packet->packet_type = BAT_PACKET; | |
252 | batman_packet->version = COMPAT_VERSION; | |
253 | batman_packet->flags = 0; | |
254 | batman_packet->ttl = 2; | |
255 | batman_packet->tq = TQ_MAX_VALUE; | |
256 | batman_packet->num_hna = 0; | |
5beef3c9 | 257 | |
208e13e4 ML |
258 | batman_if->if_num = bat_priv->num_ifaces; |
259 | bat_priv->num_ifaces++; | |
260 | batman_if->if_status = IF_INACTIVE; | |
261 | orig_hash_add_if(batman_if, bat_priv->num_ifaces); | |
5beef3c9 | 262 | |
208e13e4 | 263 | atomic_set(&batman_if->seqno, 1); |
c1641862 | 264 | bat_info(soft_device, "Adding interface: %s\n", batman_if->dev); |
5beef3c9 | 265 | |
208e13e4 | 266 | if (hardif_is_iface_up(batman_if)) |
c1641862 | 267 | hardif_activate_interface(soft_device, bat_priv, batman_if); |
208e13e4 | 268 | else |
c1641862 SE |
269 | bat_err(soft_device, "Not using interface %s " |
270 | "(retrying later): interface not active\n", | |
271 | batman_if->dev); | |
5beef3c9 | 272 | |
208e13e4 ML |
273 | /* begin scheduling originator messages on that interface */ |
274 | schedule_own_packet(batman_if); | |
5beef3c9 | 275 | |
208e13e4 ML |
276 | out: |
277 | return 0; | |
5beef3c9 | 278 | |
208e13e4 ML |
279 | err: |
280 | return -ENOMEM; | |
5beef3c9 AL |
281 | } |
282 | ||
208e13e4 | 283 | void hardif_disable_interface(struct batman_if *batman_if) |
5beef3c9 | 284 | { |
208e13e4 ML |
285 | /* FIXME: each batman_if will be attached to a softif */ |
286 | struct bat_priv *bat_priv = netdev_priv(soft_device); | |
5beef3c9 | 287 | |
208e13e4 | 288 | if (batman_if->if_status == IF_ACTIVE) |
c1641862 | 289 | hardif_deactivate_interface(soft_device, batman_if); |
5beef3c9 | 290 | |
208e13e4 ML |
291 | if (batman_if->if_status != IF_INACTIVE) |
292 | return; | |
5beef3c9 | 293 | |
c1641862 | 294 | bat_info(soft_device, "Removing interface: %s\n", batman_if->dev); |
208e13e4 ML |
295 | bat_priv->num_ifaces--; |
296 | orig_hash_del_if(batman_if, bat_priv->num_ifaces); | |
5beef3c9 | 297 | |
208e13e4 ML |
298 | if (batman_if == bat_priv->primary_if) |
299 | set_primary_if(bat_priv, get_active_batman_if()); | |
5beef3c9 | 300 | |
208e13e4 ML |
301 | kfree(batman_if->packet_buff); |
302 | batman_if->packet_buff = NULL; | |
303 | batman_if->if_status = IF_NOT_IN_USE; | |
5beef3c9 | 304 | |
208e13e4 ML |
305 | if ((atomic_read(&module_state) == MODULE_ACTIVE) && |
306 | (bat_priv->num_ifaces == 0)) | |
307 | deactivate_module(); | |
5beef3c9 AL |
308 | } |
309 | ||
208e13e4 | 310 | static struct batman_if *hardif_add_interface(struct net_device *net_dev) |
5beef3c9 AL |
311 | { |
312 | struct batman_if *batman_if; | |
208e13e4 | 313 | int ret; |
5beef3c9 | 314 | |
208e13e4 ML |
315 | ret = is_valid_iface(net_dev); |
316 | if (ret != 1) | |
317 | goto out; | |
5beef3c9 | 318 | |
51a00eaf SE |
319 | dev_hold(net_dev); |
320 | ||
208e13e4 | 321 | batman_if = kmalloc(sizeof(struct batman_if), GFP_ATOMIC); |
5beef3c9 | 322 | if (!batman_if) { |
c1641862 | 323 | pr_err("Can't add interface (%s): out of memory\n", |
208e13e4 | 324 | net_dev->name); |
51a00eaf | 325 | goto release_dev; |
5beef3c9 AL |
326 | } |
327 | ||
208e13e4 ML |
328 | batman_if->dev = kstrdup(net_dev->name, GFP_ATOMIC); |
329 | if (!batman_if->dev) | |
330 | goto free_if; | |
5beef3c9 | 331 | |
208e13e4 ML |
332 | ret = sysfs_add_hardif(&batman_if->hardif_obj, net_dev); |
333 | if (ret) | |
334 | goto free_dev; | |
5beef3c9 | 335 | |
208e13e4 ML |
336 | batman_if->if_num = -1; |
337 | batman_if->net_dev = net_dev; | |
338 | batman_if->if_status = IF_NOT_IN_USE; | |
f86b9984 | 339 | batman_if->packet_buff = NULL; |
5beef3c9 AL |
340 | INIT_LIST_HEAD(&batman_if->list); |
341 | ||
208e13e4 ML |
342 | check_known_mac_addr(batman_if->net_dev->dev_addr); |
343 | list_add_tail_rcu(&batman_if->list, &if_list); | |
344 | return batman_if; | |
5beef3c9 | 345 | |
208e13e4 ML |
346 | free_dev: |
347 | kfree(batman_if->dev); | |
348 | free_if: | |
349 | kfree(batman_if); | |
51a00eaf SE |
350 | release_dev: |
351 | dev_put(net_dev); | |
208e13e4 ML |
352 | out: |
353 | return NULL; | |
354 | } | |
5beef3c9 | 355 | |
208e13e4 ML |
356 | static void hardif_free_interface(struct rcu_head *rcu) |
357 | { | |
358 | struct batman_if *batman_if = container_of(rcu, struct batman_if, rcu); | |
5beef3c9 | 359 | |
208e13e4 ML |
360 | /* delete all references to this batman_if */ |
361 | purge_orig(NULL); | |
362 | purge_outstanding_packets(batman_if); | |
5beef3c9 | 363 | |
208e13e4 ML |
364 | kfree(batman_if->dev); |
365 | kfree(batman_if); | |
366 | } | |
5beef3c9 | 367 | |
208e13e4 ML |
368 | static void hardif_remove_interface(struct batman_if *batman_if) |
369 | { | |
370 | /* first deactivate interface */ | |
371 | if (batman_if->if_status != IF_NOT_IN_USE) | |
372 | hardif_disable_interface(batman_if); | |
5beef3c9 | 373 | |
208e13e4 ML |
374 | if (batman_if->if_status != IF_NOT_IN_USE) |
375 | return; | |
5beef3c9 | 376 | |
208e13e4 ML |
377 | batman_if->if_status = IF_TO_BE_REMOVED; |
378 | list_del_rcu(&batman_if->list); | |
379 | sysfs_del_hardif(&batman_if->hardif_obj); | |
51a00eaf | 380 | dev_put(batman_if->net_dev); |
208e13e4 | 381 | call_rcu(&batman_if->rcu, hardif_free_interface); |
5beef3c9 AL |
382 | } |
383 | ||
208e13e4 | 384 | void hardif_remove_interfaces(void) |
5beef3c9 | 385 | { |
208e13e4 ML |
386 | struct batman_if *batman_if, *batman_if_tmp; |
387 | ||
388 | list_for_each_entry_safe(batman_if, batman_if_tmp, &if_list, list) | |
389 | hardif_remove_interface(batman_if); | |
5beef3c9 AL |
390 | } |
391 | ||
392 | static int hard_if_event(struct notifier_block *this, | |
208e13e4 | 393 | unsigned long event, void *ptr) |
5beef3c9 | 394 | { |
208e13e4 ML |
395 | struct net_device *net_dev = (struct net_device *)ptr; |
396 | struct batman_if *batman_if = get_batman_if_by_netdev(net_dev); | |
397 | /* FIXME: each batman_if will be attached to a softif */ | |
398 | struct bat_priv *bat_priv = netdev_priv(soft_device); | |
399 | ||
1189f130 SE |
400 | if (!batman_if && event == NETDEV_REGISTER) |
401 | batman_if = hardif_add_interface(net_dev); | |
5beef3c9 AL |
402 | |
403 | if (!batman_if) | |
404 | goto out; | |
405 | ||
406 | switch (event) { | |
208e13e4 | 407 | case NETDEV_UP: |
c1641862 | 408 | hardif_activate_interface(soft_device, bat_priv, batman_if); |
208e13e4 | 409 | break; |
5beef3c9 AL |
410 | case NETDEV_GOING_DOWN: |
411 | case NETDEV_DOWN: | |
c1641862 | 412 | hardif_deactivate_interface(soft_device, batman_if); |
5beef3c9 | 413 | break; |
208e13e4 ML |
414 | case NETDEV_UNREGISTER: |
415 | hardif_remove_interface(batman_if); | |
416 | break; | |
417 | case NETDEV_CHANGENAME: | |
418 | break; | |
419 | case NETDEV_CHANGEADDR: | |
420 | check_known_mac_addr(batman_if->net_dev->dev_addr); | |
421 | update_mac_addresses(batman_if); | |
422 | if (batman_if == bat_priv->primary_if) | |
423 | set_primary_if(bat_priv, batman_if); | |
5beef3c9 | 424 | break; |
5beef3c9 | 425 | default: |
5beef3c9 AL |
426 | break; |
427 | }; | |
428 | ||
5beef3c9 AL |
429 | out: |
430 | return NOTIFY_DONE; | |
431 | } | |
432 | ||
e7017195 SW |
433 | /* receive a packet with the batman ethertype coming on a hard |
434 | * interface */ | |
435 | int batman_skb_recv(struct sk_buff *skb, struct net_device *dev, | |
436 | struct packet_type *ptype, struct net_device *orig_dev) | |
437 | { | |
84ec0864 ML |
438 | /* FIXME: each orig_node->batman_if will be attached to a softif */ |
439 | struct bat_priv *bat_priv = netdev_priv(soft_device); | |
e7017195 SW |
440 | struct batman_packet *batman_packet; |
441 | struct batman_if *batman_if; | |
e7017195 SW |
442 | int ret; |
443 | ||
da6d6c7a | 444 | skb = skb_share_check(skb, GFP_ATOMIC); |
e7017195 | 445 | |
da6d6c7a ML |
446 | /* skb was released by skb_share_check() */ |
447 | if (!skb) | |
448 | goto err_out; | |
e7017195 | 449 | |
af71b816 ML |
450 | if (atomic_read(&module_state) != MODULE_ACTIVE) |
451 | goto err_free; | |
452 | ||
e7017195 SW |
453 | /* packet should hold at least type and version */ |
454 | if (unlikely(skb_headlen(skb) < 2)) | |
455 | goto err_free; | |
456 | ||
457 | /* expect a valid ethernet header here. */ | |
458 | if (unlikely(skb->mac_len != sizeof(struct ethhdr) | |
459 | || !skb_mac_header(skb))) | |
460 | goto err_free; | |
461 | ||
208e13e4 | 462 | batman_if = get_batman_if_by_netdev(skb->dev); |
e7017195 SW |
463 | if (!batman_if) |
464 | goto err_free; | |
465 | ||
af71b816 | 466 | /* discard frames on not active interfaces */ |
208e13e4 | 467 | if (batman_if->if_status != IF_ACTIVE) |
af71b816 ML |
468 | goto err_free; |
469 | ||
e7017195 SW |
470 | batman_packet = (struct batman_packet *)skb->data; |
471 | ||
472 | if (batman_packet->version != COMPAT_VERSION) { | |
84ec0864 | 473 | bat_dbg(DBG_BATMAN, bat_priv, |
e7017195 SW |
474 | "Drop packet: incompatible batman version (%i)\n", |
475 | batman_packet->version); | |
476 | goto err_free; | |
477 | } | |
478 | ||
479 | /* all receive handlers return whether they received or reused | |
480 | * the supplied skb. if not, we have to free the skb. */ | |
481 | ||
482 | switch (batman_packet->packet_type) { | |
483 | /* batman originator packet */ | |
484 | case BAT_PACKET: | |
485 | ret = recv_bat_packet(skb, batman_if); | |
486 | break; | |
487 | ||
488 | /* batman icmp packet */ | |
489 | case BAT_ICMP: | |
490 | ret = recv_icmp_packet(skb); | |
491 | break; | |
492 | ||
493 | /* unicast packet */ | |
494 | case BAT_UNICAST: | |
11f79dec | 495 | ret = recv_unicast_packet(skb, batman_if); |
e7017195 SW |
496 | break; |
497 | ||
498 | /* broadcast packet */ | |
499 | case BAT_BCAST: | |
500 | ret = recv_bcast_packet(skb); | |
501 | break; | |
502 | ||
503 | /* vis packet */ | |
504 | case BAT_VIS: | |
505 | ret = recv_vis_packet(skb); | |
506 | break; | |
507 | default: | |
508 | ret = NET_RX_DROP; | |
509 | } | |
da6d6c7a | 510 | |
e7017195 SW |
511 | if (ret == NET_RX_DROP) |
512 | kfree_skb(skb); | |
513 | ||
514 | /* return NET_RX_SUCCESS in any case as we | |
515 | * most probably dropped the packet for | |
516 | * routing-logical reasons. */ | |
517 | ||
518 | return NET_RX_SUCCESS; | |
519 | ||
520 | err_free: | |
da6d6c7a ML |
521 | kfree_skb(skb); |
522 | err_out: | |
523 | return NET_RX_DROP; | |
e7017195 SW |
524 | } |
525 | ||
5beef3c9 | 526 | struct notifier_block hard_if_notifier = { |
bad2239e | 527 | .notifier_call = hard_if_event, |
5beef3c9 | 528 | }; |