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Commit | Line | Data |
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c6c8fea2 | 1 | /* |
567db7b0 | 2 | * Copyright (C) 2007-2012 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 "hard-interface.h" | |
24 | #include "soft-interface.h" | |
25 | #include "send.h" | |
26 | #include "translation-table.h" | |
27 | #include "routing.h" | |
28 | #include "bat_sysfs.h" | |
29 | #include "originator.h" | |
30 | #include "hash.h" | |
23721387 | 31 | #include "bridge_loop_avoidance.h" |
c6c8fea2 SE |
32 | |
33 | #include <linux/if_arp.h> | |
34 | ||
ed75ccbe | 35 | void hardif_free_rcu(struct rcu_head *rcu) |
c6c8fea2 | 36 | { |
e6c10f43 | 37 | struct hard_iface *hard_iface; |
c6c8fea2 | 38 | |
e6c10f43 ML |
39 | hard_iface = container_of(rcu, struct hard_iface, rcu); |
40 | dev_put(hard_iface->net_dev); | |
41 | kfree(hard_iface); | |
c6c8fea2 SE |
42 | } |
43 | ||
747e4221 | 44 | struct hard_iface *hardif_get_by_netdev(const struct net_device *net_dev) |
c6c8fea2 | 45 | { |
e6c10f43 | 46 | struct hard_iface *hard_iface; |
c6c8fea2 SE |
47 | |
48 | rcu_read_lock(); | |
e6c10f43 ML |
49 | list_for_each_entry_rcu(hard_iface, &hardif_list, list) { |
50 | if (hard_iface->net_dev == net_dev && | |
51 | atomic_inc_not_zero(&hard_iface->refcount)) | |
c6c8fea2 SE |
52 | goto out; |
53 | } | |
54 | ||
e6c10f43 | 55 | hard_iface = NULL; |
c6c8fea2 SE |
56 | |
57 | out: | |
c6c8fea2 | 58 | rcu_read_unlock(); |
e6c10f43 | 59 | return hard_iface; |
c6c8fea2 SE |
60 | } |
61 | ||
747e4221 | 62 | static int is_valid_iface(const struct net_device *net_dev) |
c6c8fea2 SE |
63 | { |
64 | if (net_dev->flags & IFF_LOOPBACK) | |
65 | return 0; | |
66 | ||
67 | if (net_dev->type != ARPHRD_ETHER) | |
68 | return 0; | |
69 | ||
70 | if (net_dev->addr_len != ETH_ALEN) | |
71 | return 0; | |
72 | ||
73 | /* no batman over batman */ | |
e44d8fe2 | 74 | if (softif_is_valid(net_dev)) |
c6c8fea2 | 75 | return 0; |
c6c8fea2 SE |
76 | |
77 | /* Device is being bridged */ | |
78 | /* if (net_dev->priv_flags & IFF_BRIDGE_PORT) | |
79 | return 0; */ | |
80 | ||
81 | return 1; | |
82 | } | |
83 | ||
747e4221 | 84 | static struct hard_iface *hardif_get_active(const struct net_device *soft_iface) |
c6c8fea2 | 85 | { |
e6c10f43 | 86 | struct hard_iface *hard_iface; |
c6c8fea2 SE |
87 | |
88 | rcu_read_lock(); | |
e6c10f43 ML |
89 | list_for_each_entry_rcu(hard_iface, &hardif_list, list) { |
90 | if (hard_iface->soft_iface != soft_iface) | |
c6c8fea2 SE |
91 | continue; |
92 | ||
e6c10f43 ML |
93 | if (hard_iface->if_status == IF_ACTIVE && |
94 | atomic_inc_not_zero(&hard_iface->refcount)) | |
c6c8fea2 SE |
95 | goto out; |
96 | } | |
97 | ||
e6c10f43 | 98 | hard_iface = NULL; |
c6c8fea2 SE |
99 | |
100 | out: | |
c6c8fea2 | 101 | rcu_read_unlock(); |
e6c10f43 | 102 | return hard_iface; |
c6c8fea2 SE |
103 | } |
104 | ||
23721387 SW |
105 | static void primary_if_update_addr(struct bat_priv *bat_priv, |
106 | struct hard_iface *oldif) | |
c6c8fea2 SE |
107 | { |
108 | struct vis_packet *vis_packet; | |
32ae9b22 ML |
109 | struct hard_iface *primary_if; |
110 | ||
111 | primary_if = primary_if_get_selected(bat_priv); | |
112 | if (!primary_if) | |
113 | goto out; | |
c6c8fea2 SE |
114 | |
115 | vis_packet = (struct vis_packet *) | |
116 | bat_priv->my_vis_info->skb_packet->data; | |
32ae9b22 | 117 | memcpy(vis_packet->vis_orig, primary_if->net_dev->dev_addr, ETH_ALEN); |
c6c8fea2 | 118 | memcpy(vis_packet->sender_orig, |
32ae9b22 ML |
119 | primary_if->net_dev->dev_addr, ETH_ALEN); |
120 | ||
08adf151 | 121 | batadv_bla_update_orig_address(bat_priv, primary_if, oldif); |
32ae9b22 ML |
122 | out: |
123 | if (primary_if) | |
124 | hardif_free_ref(primary_if); | |
c6c8fea2 SE |
125 | } |
126 | ||
32ae9b22 ML |
127 | static void primary_if_select(struct bat_priv *bat_priv, |
128 | struct hard_iface *new_hard_iface) | |
c6c8fea2 | 129 | { |
32ae9b22 | 130 | struct hard_iface *curr_hard_iface; |
c6c8fea2 | 131 | |
c3caf519 | 132 | ASSERT_RTNL(); |
c6c8fea2 | 133 | |
32ae9b22 ML |
134 | if (new_hard_iface && !atomic_inc_not_zero(&new_hard_iface->refcount)) |
135 | new_hard_iface = NULL; | |
c6c8fea2 | 136 | |
728cbc6a | 137 | curr_hard_iface = rcu_dereference_protected(bat_priv->primary_if, 1); |
32ae9b22 | 138 | rcu_assign_pointer(bat_priv->primary_if, new_hard_iface); |
c6c8fea2 | 139 | |
32ae9b22 | 140 | if (!new_hard_iface) |
23721387 | 141 | goto out; |
32ae9b22 | 142 | |
cd8b78e7 | 143 | bat_priv->bat_algo_ops->bat_primary_iface_set(new_hard_iface); |
23721387 SW |
144 | primary_if_update_addr(bat_priv, curr_hard_iface); |
145 | ||
146 | out: | |
147 | if (curr_hard_iface) | |
148 | hardif_free_ref(curr_hard_iface); | |
c6c8fea2 SE |
149 | } |
150 | ||
747e4221 | 151 | static bool hardif_is_iface_up(const struct hard_iface *hard_iface) |
c6c8fea2 | 152 | { |
e6c10f43 | 153 | if (hard_iface->net_dev->flags & IFF_UP) |
c6c8fea2 SE |
154 | return true; |
155 | ||
156 | return false; | |
157 | } | |
158 | ||
747e4221 | 159 | static void check_known_mac_addr(const struct net_device *net_dev) |
c6c8fea2 | 160 | { |
747e4221 | 161 | const struct hard_iface *hard_iface; |
c6c8fea2 SE |
162 | |
163 | rcu_read_lock(); | |
e6c10f43 ML |
164 | list_for_each_entry_rcu(hard_iface, &hardif_list, list) { |
165 | if ((hard_iface->if_status != IF_ACTIVE) && | |
166 | (hard_iface->if_status != IF_TO_BE_ACTIVATED)) | |
c6c8fea2 SE |
167 | continue; |
168 | ||
e6c10f43 | 169 | if (hard_iface->net_dev == net_dev) |
c6c8fea2 SE |
170 | continue; |
171 | ||
e6c10f43 ML |
172 | if (!compare_eth(hard_iface->net_dev->dev_addr, |
173 | net_dev->dev_addr)) | |
c6c8fea2 SE |
174 | continue; |
175 | ||
67969581 SE |
176 | pr_warn("The newly added mac address (%pM) already exists on: %s\n", |
177 | net_dev->dev_addr, hard_iface->net_dev->name); | |
178 | pr_warn("It is strongly recommended to keep mac addresses unique to avoid problems!\n"); | |
c6c8fea2 SE |
179 | } |
180 | rcu_read_unlock(); | |
181 | } | |
182 | ||
183 | int hardif_min_mtu(struct net_device *soft_iface) | |
184 | { | |
747e4221 SE |
185 | const struct bat_priv *bat_priv = netdev_priv(soft_iface); |
186 | const struct hard_iface *hard_iface; | |
c6c8fea2 SE |
187 | /* allow big frames if all devices are capable to do so |
188 | * (have MTU > 1500 + BAT_HEADER_LEN) */ | |
189 | int min_mtu = ETH_DATA_LEN; | |
190 | ||
191 | if (atomic_read(&bat_priv->fragmentation)) | |
192 | goto out; | |
193 | ||
194 | rcu_read_lock(); | |
e6c10f43 ML |
195 | list_for_each_entry_rcu(hard_iface, &hardif_list, list) { |
196 | if ((hard_iface->if_status != IF_ACTIVE) && | |
197 | (hard_iface->if_status != IF_TO_BE_ACTIVATED)) | |
c6c8fea2 SE |
198 | continue; |
199 | ||
e6c10f43 | 200 | if (hard_iface->soft_iface != soft_iface) |
c6c8fea2 SE |
201 | continue; |
202 | ||
e6c10f43 | 203 | min_mtu = min_t(int, hard_iface->net_dev->mtu - BAT_HEADER_LEN, |
c6c8fea2 SE |
204 | min_mtu); |
205 | } | |
206 | rcu_read_unlock(); | |
207 | out: | |
208 | return min_mtu; | |
209 | } | |
210 | ||
211 | /* adjusts the MTU if a new interface with a smaller MTU appeared. */ | |
212 | void update_min_mtu(struct net_device *soft_iface) | |
213 | { | |
214 | int min_mtu; | |
215 | ||
216 | min_mtu = hardif_min_mtu(soft_iface); | |
217 | if (soft_iface->mtu != min_mtu) | |
218 | soft_iface->mtu = min_mtu; | |
219 | } | |
220 | ||
e6c10f43 | 221 | static void hardif_activate_interface(struct hard_iface *hard_iface) |
c6c8fea2 SE |
222 | { |
223 | struct bat_priv *bat_priv; | |
32ae9b22 | 224 | struct hard_iface *primary_if = NULL; |
c6c8fea2 | 225 | |
e6c10f43 | 226 | if (hard_iface->if_status != IF_INACTIVE) |
32ae9b22 | 227 | goto out; |
c6c8fea2 | 228 | |
e6c10f43 | 229 | bat_priv = netdev_priv(hard_iface->soft_iface); |
c6c8fea2 | 230 | |
c3229398 | 231 | bat_priv->bat_algo_ops->bat_iface_update_mac(hard_iface); |
e6c10f43 | 232 | hard_iface->if_status = IF_TO_BE_ACTIVATED; |
c6c8fea2 SE |
233 | |
234 | /** | |
235 | * the first active interface becomes our primary interface or | |
015758d0 | 236 | * the next active interface after the old primary interface was removed |
c6c8fea2 | 237 | */ |
32ae9b22 ML |
238 | primary_if = primary_if_get_selected(bat_priv); |
239 | if (!primary_if) | |
240 | primary_if_select(bat_priv, hard_iface); | |
c6c8fea2 | 241 | |
e6c10f43 ML |
242 | bat_info(hard_iface->soft_iface, "Interface activated: %s\n", |
243 | hard_iface->net_dev->name); | |
c6c8fea2 | 244 | |
e6c10f43 | 245 | update_min_mtu(hard_iface->soft_iface); |
32ae9b22 ML |
246 | |
247 | out: | |
248 | if (primary_if) | |
249 | hardif_free_ref(primary_if); | |
c6c8fea2 SE |
250 | } |
251 | ||
e6c10f43 | 252 | static void hardif_deactivate_interface(struct hard_iface *hard_iface) |
c6c8fea2 | 253 | { |
e6c10f43 ML |
254 | if ((hard_iface->if_status != IF_ACTIVE) && |
255 | (hard_iface->if_status != IF_TO_BE_ACTIVATED)) | |
c6c8fea2 SE |
256 | return; |
257 | ||
e6c10f43 | 258 | hard_iface->if_status = IF_INACTIVE; |
c6c8fea2 | 259 | |
e6c10f43 ML |
260 | bat_info(hard_iface->soft_iface, "Interface deactivated: %s\n", |
261 | hard_iface->net_dev->name); | |
c6c8fea2 | 262 | |
e6c10f43 | 263 | update_min_mtu(hard_iface->soft_iface); |
c6c8fea2 SE |
264 | } |
265 | ||
747e4221 SE |
266 | int hardif_enable_interface(struct hard_iface *hard_iface, |
267 | const char *iface_name) | |
c6c8fea2 SE |
268 | { |
269 | struct bat_priv *bat_priv; | |
e44d8fe2 SE |
270 | struct net_device *soft_iface; |
271 | int ret; | |
c6c8fea2 | 272 | |
e6c10f43 | 273 | if (hard_iface->if_status != IF_NOT_IN_USE) |
c6c8fea2 SE |
274 | goto out; |
275 | ||
e6c10f43 | 276 | if (!atomic_inc_not_zero(&hard_iface->refcount)) |
ed75ccbe ML |
277 | goto out; |
278 | ||
6e242f90 ML |
279 | /* hard-interface is part of a bridge */ |
280 | if (hard_iface->net_dev->priv_flags & IFF_BRIDGE_PORT) | |
86ceb360 | 281 | pr_err("You are about to enable batman-adv on '%s' which already is part of a bridge. Unless you know exactly what you are doing this is probably wrong and won't work the way you think it would.\n", |
6e242f90 ML |
282 | hard_iface->net_dev->name); |
283 | ||
e44d8fe2 | 284 | soft_iface = dev_get_by_name(&init_net, iface_name); |
c6c8fea2 | 285 | |
e44d8fe2 SE |
286 | if (!soft_iface) { |
287 | soft_iface = softif_create(iface_name); | |
c6c8fea2 | 288 | |
e44d8fe2 SE |
289 | if (!soft_iface) { |
290 | ret = -ENOMEM; | |
c6c8fea2 | 291 | goto err; |
e44d8fe2 | 292 | } |
c6c8fea2 SE |
293 | |
294 | /* dev_get_by_name() increases the reference counter for us */ | |
e44d8fe2 SE |
295 | dev_hold(soft_iface); |
296 | } | |
297 | ||
298 | if (!softif_is_valid(soft_iface)) { | |
86ceb360 | 299 | pr_err("Can't create batman mesh interface %s: already exists as regular interface\n", |
e44d8fe2 | 300 | soft_iface->name); |
e44d8fe2 | 301 | ret = -EINVAL; |
77af7575 | 302 | goto err_dev; |
c6c8fea2 SE |
303 | } |
304 | ||
e44d8fe2 | 305 | hard_iface->soft_iface = soft_iface; |
e6c10f43 | 306 | bat_priv = netdev_priv(hard_iface->soft_iface); |
d0b9fd89 | 307 | |
77af7575 | 308 | ret = bat_priv->bat_algo_ops->bat_iface_enable(hard_iface); |
5346c35e | 309 | if (ret < 0) |
77af7575 | 310 | goto err_dev; |
c6c8fea2 | 311 | |
e6c10f43 | 312 | hard_iface->if_num = bat_priv->num_ifaces; |
c6c8fea2 | 313 | bat_priv->num_ifaces++; |
e6c10f43 ML |
314 | hard_iface->if_status = IF_INACTIVE; |
315 | orig_hash_add_if(hard_iface, bat_priv->num_ifaces); | |
c6c8fea2 | 316 | |
e6c10f43 ML |
317 | hard_iface->batman_adv_ptype.type = __constant_htons(ETH_P_BATMAN); |
318 | hard_iface->batman_adv_ptype.func = batman_skb_recv; | |
319 | hard_iface->batman_adv_ptype.dev = hard_iface->net_dev; | |
320 | dev_add_pack(&hard_iface->batman_adv_ptype); | |
c6c8fea2 | 321 | |
e6c10f43 ML |
322 | atomic_set(&hard_iface->frag_seqno, 1); |
323 | bat_info(hard_iface->soft_iface, "Adding interface: %s\n", | |
324 | hard_iface->net_dev->name); | |
c6c8fea2 | 325 | |
e6c10f43 | 326 | if (atomic_read(&bat_priv->fragmentation) && hard_iface->net_dev->mtu < |
c6c8fea2 | 327 | ETH_DATA_LEN + BAT_HEADER_LEN) |
e6c10f43 | 328 | bat_info(hard_iface->soft_iface, |
86ceb360 | 329 | "The MTU of interface %s is too small (%i) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to %zi would solve the problem.\n", |
7c64fd98 SE |
330 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
331 | ETH_DATA_LEN + BAT_HEADER_LEN); | |
c6c8fea2 | 332 | |
e6c10f43 | 333 | if (!atomic_read(&bat_priv->fragmentation) && hard_iface->net_dev->mtu < |
c6c8fea2 | 334 | ETH_DATA_LEN + BAT_HEADER_LEN) |
e6c10f43 | 335 | bat_info(hard_iface->soft_iface, |
86ceb360 | 336 | "The MTU of interface %s is too small (%i) to handle the transport of batman-adv packets. If you experience problems getting traffic through try increasing the MTU to %zi.\n", |
7c64fd98 SE |
337 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
338 | ETH_DATA_LEN + BAT_HEADER_LEN); | |
c6c8fea2 | 339 | |
e6c10f43 ML |
340 | if (hardif_is_iface_up(hard_iface)) |
341 | hardif_activate_interface(hard_iface); | |
c6c8fea2 | 342 | else |
86ceb360 SE |
343 | bat_err(hard_iface->soft_iface, |
344 | "Not using interface %s (retrying later): interface not active\n", | |
e6c10f43 | 345 | hard_iface->net_dev->name); |
c6c8fea2 SE |
346 | |
347 | /* begin scheduling originator messages on that interface */ | |
b9dacc52 | 348 | schedule_bat_ogm(hard_iface); |
c6c8fea2 SE |
349 | |
350 | out: | |
351 | return 0; | |
352 | ||
77af7575 ML |
353 | err_dev: |
354 | dev_put(soft_iface); | |
c6c8fea2 | 355 | err: |
e6c10f43 | 356 | hardif_free_ref(hard_iface); |
e44d8fe2 | 357 | return ret; |
c6c8fea2 SE |
358 | } |
359 | ||
e6c10f43 | 360 | void hardif_disable_interface(struct hard_iface *hard_iface) |
c6c8fea2 | 361 | { |
e6c10f43 | 362 | struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
32ae9b22 | 363 | struct hard_iface *primary_if = NULL; |
c6c8fea2 | 364 | |
e6c10f43 ML |
365 | if (hard_iface->if_status == IF_ACTIVE) |
366 | hardif_deactivate_interface(hard_iface); | |
c6c8fea2 | 367 | |
e6c10f43 | 368 | if (hard_iface->if_status != IF_INACTIVE) |
32ae9b22 | 369 | goto out; |
c6c8fea2 | 370 | |
e6c10f43 ML |
371 | bat_info(hard_iface->soft_iface, "Removing interface: %s\n", |
372 | hard_iface->net_dev->name); | |
373 | dev_remove_pack(&hard_iface->batman_adv_ptype); | |
c6c8fea2 SE |
374 | |
375 | bat_priv->num_ifaces--; | |
e6c10f43 | 376 | orig_hash_del_if(hard_iface, bat_priv->num_ifaces); |
c6c8fea2 | 377 | |
32ae9b22 ML |
378 | primary_if = primary_if_get_selected(bat_priv); |
379 | if (hard_iface == primary_if) { | |
e6c10f43 | 380 | struct hard_iface *new_if; |
c6c8fea2 | 381 | |
e6c10f43 | 382 | new_if = hardif_get_active(hard_iface->soft_iface); |
32ae9b22 | 383 | primary_if_select(bat_priv, new_if); |
c6c8fea2 SE |
384 | |
385 | if (new_if) | |
ed75ccbe | 386 | hardif_free_ref(new_if); |
c6c8fea2 SE |
387 | } |
388 | ||
00a50076 | 389 | bat_priv->bat_algo_ops->bat_iface_disable(hard_iface); |
e6c10f43 | 390 | hard_iface->if_status = IF_NOT_IN_USE; |
c6c8fea2 | 391 | |
e6c10f43 | 392 | /* delete all references to this hard_iface */ |
c6c8fea2 | 393 | purge_orig_ref(bat_priv); |
e6c10f43 ML |
394 | purge_outstanding_packets(bat_priv, hard_iface); |
395 | dev_put(hard_iface->soft_iface); | |
c6c8fea2 SE |
396 | |
397 | /* nobody uses this interface anymore */ | |
398 | if (!bat_priv->num_ifaces) | |
e6c10f43 | 399 | softif_destroy(hard_iface->soft_iface); |
c6c8fea2 | 400 | |
e6c10f43 ML |
401 | hard_iface->soft_iface = NULL; |
402 | hardif_free_ref(hard_iface); | |
32ae9b22 ML |
403 | |
404 | out: | |
405 | if (primary_if) | |
406 | hardif_free_ref(primary_if); | |
c6c8fea2 SE |
407 | } |
408 | ||
e6c10f43 | 409 | static struct hard_iface *hardif_add_interface(struct net_device *net_dev) |
c6c8fea2 | 410 | { |
e6c10f43 | 411 | struct hard_iface *hard_iface; |
c6c8fea2 SE |
412 | int ret; |
413 | ||
c3caf519 SE |
414 | ASSERT_RTNL(); |
415 | ||
c6c8fea2 SE |
416 | ret = is_valid_iface(net_dev); |
417 | if (ret != 1) | |
418 | goto out; | |
419 | ||
420 | dev_hold(net_dev); | |
421 | ||
704509b8 | 422 | hard_iface = kmalloc(sizeof(*hard_iface), GFP_ATOMIC); |
320f422f | 423 | if (!hard_iface) |
c6c8fea2 | 424 | goto release_dev; |
c6c8fea2 | 425 | |
5853e22c | 426 | ret = batadv_sysfs_add_hardif(&hard_iface->hardif_obj, net_dev); |
c6c8fea2 SE |
427 | if (ret) |
428 | goto free_if; | |
429 | ||
e6c10f43 ML |
430 | hard_iface->if_num = -1; |
431 | hard_iface->net_dev = net_dev; | |
432 | hard_iface->soft_iface = NULL; | |
433 | hard_iface->if_status = IF_NOT_IN_USE; | |
434 | INIT_LIST_HEAD(&hard_iface->list); | |
ed75ccbe | 435 | /* extra reference for return */ |
e6c10f43 | 436 | atomic_set(&hard_iface->refcount, 2); |
c6c8fea2 | 437 | |
e6c10f43 | 438 | check_known_mac_addr(hard_iface->net_dev); |
e6c10f43 | 439 | list_add_tail_rcu(&hard_iface->list, &hardif_list); |
c6c8fea2 | 440 | |
8140625e ML |
441 | /** |
442 | * This can't be called via a bat_priv callback because | |
443 | * we have no bat_priv yet. | |
444 | */ | |
445 | atomic_set(&hard_iface->seqno, 1); | |
446 | hard_iface->packet_buff = NULL; | |
447 | ||
e6c10f43 | 448 | return hard_iface; |
c6c8fea2 SE |
449 | |
450 | free_if: | |
e6c10f43 | 451 | kfree(hard_iface); |
c6c8fea2 SE |
452 | release_dev: |
453 | dev_put(net_dev); | |
454 | out: | |
455 | return NULL; | |
456 | } | |
457 | ||
e6c10f43 | 458 | static void hardif_remove_interface(struct hard_iface *hard_iface) |
c6c8fea2 | 459 | { |
c3caf519 SE |
460 | ASSERT_RTNL(); |
461 | ||
c6c8fea2 | 462 | /* first deactivate interface */ |
e6c10f43 ML |
463 | if (hard_iface->if_status != IF_NOT_IN_USE) |
464 | hardif_disable_interface(hard_iface); | |
c6c8fea2 | 465 | |
e6c10f43 | 466 | if (hard_iface->if_status != IF_NOT_IN_USE) |
c6c8fea2 SE |
467 | return; |
468 | ||
e6c10f43 | 469 | hard_iface->if_status = IF_TO_BE_REMOVED; |
5853e22c | 470 | batadv_sysfs_del_hardif(&hard_iface->hardif_obj); |
e6c10f43 | 471 | hardif_free_ref(hard_iface); |
c6c8fea2 SE |
472 | } |
473 | ||
474 | void hardif_remove_interfaces(void) | |
475 | { | |
e6c10f43 | 476 | struct hard_iface *hard_iface, *hard_iface_tmp; |
c6c8fea2 | 477 | |
c3caf519 | 478 | rtnl_lock(); |
e6c10f43 ML |
479 | list_for_each_entry_safe(hard_iface, hard_iface_tmp, |
480 | &hardif_list, list) { | |
481 | list_del_rcu(&hard_iface->list); | |
e6c10f43 | 482 | hardif_remove_interface(hard_iface); |
c6c8fea2 SE |
483 | } |
484 | rtnl_unlock(); | |
485 | } | |
486 | ||
487 | static int hard_if_event(struct notifier_block *this, | |
488 | unsigned long event, void *ptr) | |
489 | { | |
5f718c20 | 490 | struct net_device *net_dev = ptr; |
e6c10f43 | 491 | struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev); |
32ae9b22 | 492 | struct hard_iface *primary_if = NULL; |
c6c8fea2 SE |
493 | struct bat_priv *bat_priv; |
494 | ||
e6c10f43 ML |
495 | if (!hard_iface && event == NETDEV_REGISTER) |
496 | hard_iface = hardif_add_interface(net_dev); | |
c6c8fea2 | 497 | |
e6c10f43 | 498 | if (!hard_iface) |
c6c8fea2 SE |
499 | goto out; |
500 | ||
501 | switch (event) { | |
502 | case NETDEV_UP: | |
e6c10f43 | 503 | hardif_activate_interface(hard_iface); |
c6c8fea2 SE |
504 | break; |
505 | case NETDEV_GOING_DOWN: | |
506 | case NETDEV_DOWN: | |
e6c10f43 | 507 | hardif_deactivate_interface(hard_iface); |
c6c8fea2 SE |
508 | break; |
509 | case NETDEV_UNREGISTER: | |
e6c10f43 | 510 | list_del_rcu(&hard_iface->list); |
c6c8fea2 | 511 | |
e6c10f43 | 512 | hardif_remove_interface(hard_iface); |
c6c8fea2 SE |
513 | break; |
514 | case NETDEV_CHANGEMTU: | |
e6c10f43 ML |
515 | if (hard_iface->soft_iface) |
516 | update_min_mtu(hard_iface->soft_iface); | |
c6c8fea2 SE |
517 | break; |
518 | case NETDEV_CHANGEADDR: | |
e6c10f43 | 519 | if (hard_iface->if_status == IF_NOT_IN_USE) |
c6c8fea2 SE |
520 | goto hardif_put; |
521 | ||
e6c10f43 | 522 | check_known_mac_addr(hard_iface->net_dev); |
c6c8fea2 | 523 | |
e6c10f43 | 524 | bat_priv = netdev_priv(hard_iface->soft_iface); |
c3229398 | 525 | bat_priv->bat_algo_ops->bat_iface_update_mac(hard_iface); |
01c4224b | 526 | |
32ae9b22 ML |
527 | primary_if = primary_if_get_selected(bat_priv); |
528 | if (!primary_if) | |
529 | goto hardif_put; | |
530 | ||
531 | if (hard_iface == primary_if) | |
23721387 | 532 | primary_if_update_addr(bat_priv, NULL); |
c6c8fea2 SE |
533 | break; |
534 | default: | |
535 | break; | |
f81c6224 | 536 | } |
c6c8fea2 SE |
537 | |
538 | hardif_put: | |
e6c10f43 | 539 | hardif_free_ref(hard_iface); |
c6c8fea2 | 540 | out: |
32ae9b22 ML |
541 | if (primary_if) |
542 | hardif_free_ref(primary_if); | |
c6c8fea2 SE |
543 | return NOTIFY_DONE; |
544 | } | |
545 | ||
bc279080 AQ |
546 | /* This function returns true if the interface represented by ifindex is a |
547 | * 802.11 wireless device */ | |
548 | bool is_wifi_iface(int ifindex) | |
549 | { | |
550 | struct net_device *net_device = NULL; | |
551 | bool ret = false; | |
552 | ||
553 | if (ifindex == NULL_IFINDEX) | |
554 | goto out; | |
555 | ||
556 | net_device = dev_get_by_index(&init_net, ifindex); | |
557 | if (!net_device) | |
558 | goto out; | |
559 | ||
560 | #ifdef CONFIG_WIRELESS_EXT | |
561 | /* pre-cfg80211 drivers have to implement WEXT, so it is possible to | |
562 | * check for wireless_handlers != NULL */ | |
563 | if (net_device->wireless_handlers) | |
564 | ret = true; | |
565 | else | |
566 | #endif | |
567 | /* cfg80211 drivers have to set ieee80211_ptr */ | |
568 | if (net_device->ieee80211_ptr) | |
569 | ret = true; | |
570 | out: | |
571 | if (net_device) | |
572 | dev_put(net_device); | |
573 | return ret; | |
574 | } | |
575 | ||
c6c8fea2 SE |
576 | struct notifier_block hard_if_notifier = { |
577 | .notifier_call = hard_if_event, | |
578 | }; |