Commit | Line | Data |
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9cfc7bd6 | 1 | /* Copyright (C) 2007-2012 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" | |
21 | #include "hard-interface.h" | |
22 | #include "soft-interface.h" | |
23 | #include "send.h" | |
24 | #include "translation-table.h" | |
25 | #include "routing.h" | |
26 | #include "bat_sysfs.h" | |
27 | #include "originator.h" | |
28 | #include "hash.h" | |
23721387 | 29 | #include "bridge_loop_avoidance.h" |
c6c8fea2 SE |
30 | |
31 | #include <linux/if_arp.h> | |
32 | ||
9563877e | 33 | void batadv_hardif_free_rcu(struct rcu_head *rcu) |
c6c8fea2 | 34 | { |
e6c10f43 | 35 | struct hard_iface *hard_iface; |
c6c8fea2 | 36 | |
e6c10f43 ML |
37 | hard_iface = container_of(rcu, struct hard_iface, rcu); |
38 | dev_put(hard_iface->net_dev); | |
39 | kfree(hard_iface); | |
c6c8fea2 SE |
40 | } |
41 | ||
9563877e | 42 | struct hard_iface *batadv_hardif_get_by_netdev(const struct net_device *net_dev) |
c6c8fea2 | 43 | { |
e6c10f43 | 44 | struct hard_iface *hard_iface; |
c6c8fea2 SE |
45 | |
46 | rcu_read_lock(); | |
3193e8fd | 47 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e6c10f43 ML |
48 | if (hard_iface->net_dev == net_dev && |
49 | atomic_inc_not_zero(&hard_iface->refcount)) | |
c6c8fea2 SE |
50 | goto out; |
51 | } | |
52 | ||
e6c10f43 | 53 | hard_iface = NULL; |
c6c8fea2 SE |
54 | |
55 | out: | |
c6c8fea2 | 56 | rcu_read_unlock(); |
e6c10f43 | 57 | return hard_iface; |
c6c8fea2 SE |
58 | } |
59 | ||
747e4221 | 60 | static int is_valid_iface(const struct net_device *net_dev) |
c6c8fea2 SE |
61 | { |
62 | if (net_dev->flags & IFF_LOOPBACK) | |
63 | return 0; | |
64 | ||
65 | if (net_dev->type != ARPHRD_ETHER) | |
66 | return 0; | |
67 | ||
68 | if (net_dev->addr_len != ETH_ALEN) | |
69 | return 0; | |
70 | ||
71 | /* no batman over batman */ | |
04b482a2 | 72 | if (batadv_softif_is_valid(net_dev)) |
c6c8fea2 | 73 | return 0; |
c6c8fea2 | 74 | |
c6c8fea2 SE |
75 | return 1; |
76 | } | |
77 | ||
747e4221 | 78 | static struct hard_iface *hardif_get_active(const struct net_device *soft_iface) |
c6c8fea2 | 79 | { |
e6c10f43 | 80 | struct hard_iface *hard_iface; |
c6c8fea2 SE |
81 | |
82 | rcu_read_lock(); | |
3193e8fd | 83 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e6c10f43 | 84 | if (hard_iface->soft_iface != soft_iface) |
c6c8fea2 SE |
85 | continue; |
86 | ||
e6c10f43 ML |
87 | if (hard_iface->if_status == IF_ACTIVE && |
88 | atomic_inc_not_zero(&hard_iface->refcount)) | |
c6c8fea2 SE |
89 | goto out; |
90 | } | |
91 | ||
e6c10f43 | 92 | hard_iface = NULL; |
c6c8fea2 SE |
93 | |
94 | out: | |
c6c8fea2 | 95 | rcu_read_unlock(); |
e6c10f43 | 96 | return hard_iface; |
c6c8fea2 SE |
97 | } |
98 | ||
23721387 SW |
99 | static void primary_if_update_addr(struct bat_priv *bat_priv, |
100 | struct hard_iface *oldif) | |
c6c8fea2 SE |
101 | { |
102 | struct vis_packet *vis_packet; | |
32ae9b22 ML |
103 | struct hard_iface *primary_if; |
104 | ||
e5d89254 | 105 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 ML |
106 | if (!primary_if) |
107 | goto out; | |
c6c8fea2 SE |
108 | |
109 | vis_packet = (struct vis_packet *) | |
110 | bat_priv->my_vis_info->skb_packet->data; | |
32ae9b22 | 111 | memcpy(vis_packet->vis_orig, primary_if->net_dev->dev_addr, ETH_ALEN); |
c6c8fea2 | 112 | memcpy(vis_packet->sender_orig, |
32ae9b22 ML |
113 | primary_if->net_dev->dev_addr, ETH_ALEN); |
114 | ||
08adf151 | 115 | batadv_bla_update_orig_address(bat_priv, primary_if, oldif); |
32ae9b22 ML |
116 | out: |
117 | if (primary_if) | |
e5d89254 | 118 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
119 | } |
120 | ||
32ae9b22 ML |
121 | static void primary_if_select(struct bat_priv *bat_priv, |
122 | struct hard_iface *new_hard_iface) | |
c6c8fea2 | 123 | { |
32ae9b22 | 124 | struct hard_iface *curr_hard_iface; |
c6c8fea2 | 125 | |
c3caf519 | 126 | ASSERT_RTNL(); |
c6c8fea2 | 127 | |
32ae9b22 ML |
128 | if (new_hard_iface && !atomic_inc_not_zero(&new_hard_iface->refcount)) |
129 | new_hard_iface = NULL; | |
c6c8fea2 | 130 | |
728cbc6a | 131 | curr_hard_iface = rcu_dereference_protected(bat_priv->primary_if, 1); |
32ae9b22 | 132 | rcu_assign_pointer(bat_priv->primary_if, new_hard_iface); |
c6c8fea2 | 133 | |
32ae9b22 | 134 | if (!new_hard_iface) |
23721387 | 135 | goto out; |
32ae9b22 | 136 | |
cd8b78e7 | 137 | bat_priv->bat_algo_ops->bat_primary_iface_set(new_hard_iface); |
23721387 SW |
138 | primary_if_update_addr(bat_priv, curr_hard_iface); |
139 | ||
140 | out: | |
141 | if (curr_hard_iface) | |
e5d89254 | 142 | batadv_hardif_free_ref(curr_hard_iface); |
c6c8fea2 SE |
143 | } |
144 | ||
747e4221 | 145 | static bool hardif_is_iface_up(const struct hard_iface *hard_iface) |
c6c8fea2 | 146 | { |
e6c10f43 | 147 | if (hard_iface->net_dev->flags & IFF_UP) |
c6c8fea2 SE |
148 | return true; |
149 | ||
150 | return false; | |
151 | } | |
152 | ||
747e4221 | 153 | static void check_known_mac_addr(const struct net_device *net_dev) |
c6c8fea2 | 154 | { |
747e4221 | 155 | const struct hard_iface *hard_iface; |
c6c8fea2 SE |
156 | |
157 | rcu_read_lock(); | |
3193e8fd | 158 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e6c10f43 ML |
159 | if ((hard_iface->if_status != IF_ACTIVE) && |
160 | (hard_iface->if_status != IF_TO_BE_ACTIVATED)) | |
c6c8fea2 SE |
161 | continue; |
162 | ||
e6c10f43 | 163 | if (hard_iface->net_dev == net_dev) |
c6c8fea2 SE |
164 | continue; |
165 | ||
e6c10f43 ML |
166 | if (!compare_eth(hard_iface->net_dev->dev_addr, |
167 | net_dev->dev_addr)) | |
c6c8fea2 SE |
168 | continue; |
169 | ||
67969581 SE |
170 | pr_warn("The newly added mac address (%pM) already exists on: %s\n", |
171 | net_dev->dev_addr, hard_iface->net_dev->name); | |
172 | pr_warn("It is strongly recommended to keep mac addresses unique to avoid problems!\n"); | |
c6c8fea2 SE |
173 | } |
174 | rcu_read_unlock(); | |
175 | } | |
176 | ||
9563877e | 177 | int batadv_hardif_min_mtu(struct net_device *soft_iface) |
c6c8fea2 | 178 | { |
747e4221 SE |
179 | const struct bat_priv *bat_priv = netdev_priv(soft_iface); |
180 | const struct hard_iface *hard_iface; | |
c6c8fea2 | 181 | /* allow big frames if all devices are capable to do so |
9cfc7bd6 SE |
182 | * (have MTU > 1500 + BAT_HEADER_LEN) |
183 | */ | |
c6c8fea2 SE |
184 | int min_mtu = ETH_DATA_LEN; |
185 | ||
186 | if (atomic_read(&bat_priv->fragmentation)) | |
187 | goto out; | |
188 | ||
189 | rcu_read_lock(); | |
3193e8fd | 190 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e6c10f43 ML |
191 | if ((hard_iface->if_status != IF_ACTIVE) && |
192 | (hard_iface->if_status != IF_TO_BE_ACTIVATED)) | |
c6c8fea2 SE |
193 | continue; |
194 | ||
e6c10f43 | 195 | if (hard_iface->soft_iface != soft_iface) |
c6c8fea2 SE |
196 | continue; |
197 | ||
e6c10f43 | 198 | min_mtu = min_t(int, hard_iface->net_dev->mtu - BAT_HEADER_LEN, |
c6c8fea2 SE |
199 | min_mtu); |
200 | } | |
201 | rcu_read_unlock(); | |
202 | out: | |
203 | return min_mtu; | |
204 | } | |
205 | ||
206 | /* adjusts the MTU if a new interface with a smaller MTU appeared. */ | |
9563877e | 207 | void batadv_update_min_mtu(struct net_device *soft_iface) |
c6c8fea2 SE |
208 | { |
209 | int min_mtu; | |
210 | ||
9563877e | 211 | min_mtu = batadv_hardif_min_mtu(soft_iface); |
c6c8fea2 SE |
212 | if (soft_iface->mtu != min_mtu) |
213 | soft_iface->mtu = min_mtu; | |
214 | } | |
215 | ||
e6c10f43 | 216 | static void hardif_activate_interface(struct hard_iface *hard_iface) |
c6c8fea2 SE |
217 | { |
218 | struct bat_priv *bat_priv; | |
32ae9b22 | 219 | struct hard_iface *primary_if = NULL; |
c6c8fea2 | 220 | |
e6c10f43 | 221 | if (hard_iface->if_status != IF_INACTIVE) |
32ae9b22 | 222 | goto out; |
c6c8fea2 | 223 | |
e6c10f43 | 224 | bat_priv = netdev_priv(hard_iface->soft_iface); |
c6c8fea2 | 225 | |
c3229398 | 226 | bat_priv->bat_algo_ops->bat_iface_update_mac(hard_iface); |
e6c10f43 | 227 | hard_iface->if_status = IF_TO_BE_ACTIVATED; |
c6c8fea2 | 228 | |
9cfc7bd6 | 229 | /* the first active interface becomes our primary interface or |
015758d0 | 230 | * the next active interface after the old primary interface was removed |
c6c8fea2 | 231 | */ |
e5d89254 | 232 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 ML |
233 | if (!primary_if) |
234 | primary_if_select(bat_priv, hard_iface); | |
c6c8fea2 | 235 | |
e6c10f43 ML |
236 | bat_info(hard_iface->soft_iface, "Interface activated: %s\n", |
237 | hard_iface->net_dev->name); | |
c6c8fea2 | 238 | |
9563877e | 239 | batadv_update_min_mtu(hard_iface->soft_iface); |
32ae9b22 ML |
240 | |
241 | out: | |
242 | if (primary_if) | |
e5d89254 | 243 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
244 | } |
245 | ||
e6c10f43 | 246 | static void hardif_deactivate_interface(struct hard_iface *hard_iface) |
c6c8fea2 | 247 | { |
e6c10f43 ML |
248 | if ((hard_iface->if_status != IF_ACTIVE) && |
249 | (hard_iface->if_status != IF_TO_BE_ACTIVATED)) | |
c6c8fea2 SE |
250 | return; |
251 | ||
e6c10f43 | 252 | hard_iface->if_status = IF_INACTIVE; |
c6c8fea2 | 253 | |
e6c10f43 ML |
254 | bat_info(hard_iface->soft_iface, "Interface deactivated: %s\n", |
255 | hard_iface->net_dev->name); | |
c6c8fea2 | 256 | |
9563877e | 257 | batadv_update_min_mtu(hard_iface->soft_iface); |
c6c8fea2 SE |
258 | } |
259 | ||
9563877e SE |
260 | int batadv_hardif_enable_interface(struct hard_iface *hard_iface, |
261 | const char *iface_name) | |
c6c8fea2 SE |
262 | { |
263 | struct bat_priv *bat_priv; | |
e44d8fe2 SE |
264 | struct net_device *soft_iface; |
265 | int ret; | |
c6c8fea2 | 266 | |
e6c10f43 | 267 | if (hard_iface->if_status != IF_NOT_IN_USE) |
c6c8fea2 SE |
268 | goto out; |
269 | ||
e6c10f43 | 270 | if (!atomic_inc_not_zero(&hard_iface->refcount)) |
ed75ccbe ML |
271 | goto out; |
272 | ||
6e242f90 ML |
273 | /* hard-interface is part of a bridge */ |
274 | if (hard_iface->net_dev->priv_flags & IFF_BRIDGE_PORT) | |
86ceb360 | 275 | 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 |
276 | hard_iface->net_dev->name); |
277 | ||
e44d8fe2 | 278 | soft_iface = dev_get_by_name(&init_net, iface_name); |
c6c8fea2 | 279 | |
e44d8fe2 | 280 | if (!soft_iface) { |
04b482a2 | 281 | soft_iface = batadv_softif_create(iface_name); |
c6c8fea2 | 282 | |
e44d8fe2 SE |
283 | if (!soft_iface) { |
284 | ret = -ENOMEM; | |
c6c8fea2 | 285 | goto err; |
e44d8fe2 | 286 | } |
c6c8fea2 SE |
287 | |
288 | /* dev_get_by_name() increases the reference counter for us */ | |
e44d8fe2 SE |
289 | dev_hold(soft_iface); |
290 | } | |
291 | ||
04b482a2 | 292 | if (!batadv_softif_is_valid(soft_iface)) { |
86ceb360 | 293 | pr_err("Can't create batman mesh interface %s: already exists as regular interface\n", |
e44d8fe2 | 294 | soft_iface->name); |
e44d8fe2 | 295 | ret = -EINVAL; |
77af7575 | 296 | goto err_dev; |
c6c8fea2 SE |
297 | } |
298 | ||
e44d8fe2 | 299 | hard_iface->soft_iface = soft_iface; |
e6c10f43 | 300 | bat_priv = netdev_priv(hard_iface->soft_iface); |
d0b9fd89 | 301 | |
77af7575 | 302 | ret = bat_priv->bat_algo_ops->bat_iface_enable(hard_iface); |
5346c35e | 303 | if (ret < 0) |
77af7575 | 304 | goto err_dev; |
c6c8fea2 | 305 | |
e6c10f43 | 306 | hard_iface->if_num = bat_priv->num_ifaces; |
c6c8fea2 | 307 | bat_priv->num_ifaces++; |
e6c10f43 | 308 | hard_iface->if_status = IF_INACTIVE; |
7d211efc | 309 | batadv_orig_hash_add_if(hard_iface, bat_priv->num_ifaces); |
c6c8fea2 | 310 | |
e6c10f43 | 311 | hard_iface->batman_adv_ptype.type = __constant_htons(ETH_P_BATMAN); |
3193e8fd | 312 | hard_iface->batman_adv_ptype.func = batadv_batman_skb_recv; |
e6c10f43 ML |
313 | hard_iface->batman_adv_ptype.dev = hard_iface->net_dev; |
314 | dev_add_pack(&hard_iface->batman_adv_ptype); | |
c6c8fea2 | 315 | |
e6c10f43 ML |
316 | atomic_set(&hard_iface->frag_seqno, 1); |
317 | bat_info(hard_iface->soft_iface, "Adding interface: %s\n", | |
318 | hard_iface->net_dev->name); | |
c6c8fea2 | 319 | |
e6c10f43 | 320 | if (atomic_read(&bat_priv->fragmentation) && hard_iface->net_dev->mtu < |
c6c8fea2 | 321 | ETH_DATA_LEN + BAT_HEADER_LEN) |
e6c10f43 | 322 | bat_info(hard_iface->soft_iface, |
86ceb360 | 323 | "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 |
324 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
325 | ETH_DATA_LEN + BAT_HEADER_LEN); | |
c6c8fea2 | 326 | |
e6c10f43 | 327 | if (!atomic_read(&bat_priv->fragmentation) && hard_iface->net_dev->mtu < |
c6c8fea2 | 328 | ETH_DATA_LEN + BAT_HEADER_LEN) |
e6c10f43 | 329 | bat_info(hard_iface->soft_iface, |
86ceb360 | 330 | "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 |
331 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
332 | ETH_DATA_LEN + BAT_HEADER_LEN); | |
c6c8fea2 | 333 | |
e6c10f43 ML |
334 | if (hardif_is_iface_up(hard_iface)) |
335 | hardif_activate_interface(hard_iface); | |
c6c8fea2 | 336 | else |
86ceb360 SE |
337 | bat_err(hard_iface->soft_iface, |
338 | "Not using interface %s (retrying later): interface not active\n", | |
e6c10f43 | 339 | hard_iface->net_dev->name); |
c6c8fea2 SE |
340 | |
341 | /* begin scheduling originator messages on that interface */ | |
9455e34c | 342 | batadv_schedule_bat_ogm(hard_iface); |
c6c8fea2 SE |
343 | |
344 | out: | |
345 | return 0; | |
346 | ||
77af7575 ML |
347 | err_dev: |
348 | dev_put(soft_iface); | |
c6c8fea2 | 349 | err: |
e5d89254 | 350 | batadv_hardif_free_ref(hard_iface); |
e44d8fe2 | 351 | return ret; |
c6c8fea2 SE |
352 | } |
353 | ||
9563877e | 354 | void batadv_hardif_disable_interface(struct hard_iface *hard_iface) |
c6c8fea2 | 355 | { |
e6c10f43 | 356 | struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
32ae9b22 | 357 | struct hard_iface *primary_if = NULL; |
c6c8fea2 | 358 | |
e6c10f43 ML |
359 | if (hard_iface->if_status == IF_ACTIVE) |
360 | hardif_deactivate_interface(hard_iface); | |
c6c8fea2 | 361 | |
e6c10f43 | 362 | if (hard_iface->if_status != IF_INACTIVE) |
32ae9b22 | 363 | goto out; |
c6c8fea2 | 364 | |
e6c10f43 ML |
365 | bat_info(hard_iface->soft_iface, "Removing interface: %s\n", |
366 | hard_iface->net_dev->name); | |
367 | dev_remove_pack(&hard_iface->batman_adv_ptype); | |
c6c8fea2 SE |
368 | |
369 | bat_priv->num_ifaces--; | |
7d211efc | 370 | batadv_orig_hash_del_if(hard_iface, bat_priv->num_ifaces); |
c6c8fea2 | 371 | |
e5d89254 | 372 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 373 | if (hard_iface == primary_if) { |
e6c10f43 | 374 | struct hard_iface *new_if; |
c6c8fea2 | 375 | |
e6c10f43 | 376 | new_if = hardif_get_active(hard_iface->soft_iface); |
32ae9b22 | 377 | primary_if_select(bat_priv, new_if); |
c6c8fea2 SE |
378 | |
379 | if (new_if) | |
e5d89254 | 380 | batadv_hardif_free_ref(new_if); |
c6c8fea2 SE |
381 | } |
382 | ||
00a50076 | 383 | bat_priv->bat_algo_ops->bat_iface_disable(hard_iface); |
e6c10f43 | 384 | hard_iface->if_status = IF_NOT_IN_USE; |
c6c8fea2 | 385 | |
e6c10f43 | 386 | /* delete all references to this hard_iface */ |
7d211efc | 387 | batadv_purge_orig_ref(bat_priv); |
9455e34c | 388 | batadv_purge_outstanding_packets(bat_priv, hard_iface); |
e6c10f43 | 389 | dev_put(hard_iface->soft_iface); |
c6c8fea2 SE |
390 | |
391 | /* nobody uses this interface anymore */ | |
392 | if (!bat_priv->num_ifaces) | |
04b482a2 | 393 | batadv_softif_destroy(hard_iface->soft_iface); |
c6c8fea2 | 394 | |
e6c10f43 | 395 | hard_iface->soft_iface = NULL; |
e5d89254 | 396 | batadv_hardif_free_ref(hard_iface); |
32ae9b22 ML |
397 | |
398 | out: | |
399 | if (primary_if) | |
e5d89254 | 400 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
401 | } |
402 | ||
e6c10f43 | 403 | static struct hard_iface *hardif_add_interface(struct net_device *net_dev) |
c6c8fea2 | 404 | { |
e6c10f43 | 405 | struct hard_iface *hard_iface; |
c6c8fea2 SE |
406 | int ret; |
407 | ||
c3caf519 SE |
408 | ASSERT_RTNL(); |
409 | ||
c6c8fea2 SE |
410 | ret = is_valid_iface(net_dev); |
411 | if (ret != 1) | |
412 | goto out; | |
413 | ||
414 | dev_hold(net_dev); | |
415 | ||
704509b8 | 416 | hard_iface = kmalloc(sizeof(*hard_iface), GFP_ATOMIC); |
320f422f | 417 | if (!hard_iface) |
c6c8fea2 | 418 | goto release_dev; |
c6c8fea2 | 419 | |
5853e22c | 420 | ret = batadv_sysfs_add_hardif(&hard_iface->hardif_obj, net_dev); |
c6c8fea2 SE |
421 | if (ret) |
422 | goto free_if; | |
423 | ||
e6c10f43 ML |
424 | hard_iface->if_num = -1; |
425 | hard_iface->net_dev = net_dev; | |
426 | hard_iface->soft_iface = NULL; | |
427 | hard_iface->if_status = IF_NOT_IN_USE; | |
428 | INIT_LIST_HEAD(&hard_iface->list); | |
ed75ccbe | 429 | /* extra reference for return */ |
e6c10f43 | 430 | atomic_set(&hard_iface->refcount, 2); |
c6c8fea2 | 431 | |
e6c10f43 | 432 | check_known_mac_addr(hard_iface->net_dev); |
3193e8fd | 433 | list_add_tail_rcu(&hard_iface->list, &batadv_hardif_list); |
c6c8fea2 | 434 | |
9cfc7bd6 | 435 | /* This can't be called via a bat_priv callback because |
8140625e ML |
436 | * we have no bat_priv yet. |
437 | */ | |
438 | atomic_set(&hard_iface->seqno, 1); | |
439 | hard_iface->packet_buff = NULL; | |
440 | ||
e6c10f43 | 441 | return hard_iface; |
c6c8fea2 SE |
442 | |
443 | free_if: | |
e6c10f43 | 444 | kfree(hard_iface); |
c6c8fea2 SE |
445 | release_dev: |
446 | dev_put(net_dev); | |
447 | out: | |
448 | return NULL; | |
449 | } | |
450 | ||
e6c10f43 | 451 | static void hardif_remove_interface(struct hard_iface *hard_iface) |
c6c8fea2 | 452 | { |
c3caf519 SE |
453 | ASSERT_RTNL(); |
454 | ||
c6c8fea2 | 455 | /* first deactivate interface */ |
e6c10f43 | 456 | if (hard_iface->if_status != IF_NOT_IN_USE) |
9563877e | 457 | batadv_hardif_disable_interface(hard_iface); |
c6c8fea2 | 458 | |
e6c10f43 | 459 | if (hard_iface->if_status != IF_NOT_IN_USE) |
c6c8fea2 SE |
460 | return; |
461 | ||
e6c10f43 | 462 | hard_iface->if_status = IF_TO_BE_REMOVED; |
5853e22c | 463 | batadv_sysfs_del_hardif(&hard_iface->hardif_obj); |
e5d89254 | 464 | batadv_hardif_free_ref(hard_iface); |
c6c8fea2 SE |
465 | } |
466 | ||
9563877e | 467 | void batadv_hardif_remove_interfaces(void) |
c6c8fea2 | 468 | { |
e6c10f43 | 469 | struct hard_iface *hard_iface, *hard_iface_tmp; |
c6c8fea2 | 470 | |
c3caf519 | 471 | rtnl_lock(); |
e6c10f43 | 472 | list_for_each_entry_safe(hard_iface, hard_iface_tmp, |
3193e8fd | 473 | &batadv_hardif_list, list) { |
e6c10f43 | 474 | list_del_rcu(&hard_iface->list); |
e6c10f43 | 475 | hardif_remove_interface(hard_iface); |
c6c8fea2 SE |
476 | } |
477 | rtnl_unlock(); | |
478 | } | |
479 | ||
480 | static int hard_if_event(struct notifier_block *this, | |
481 | unsigned long event, void *ptr) | |
482 | { | |
5f718c20 | 483 | struct net_device *net_dev = ptr; |
9563877e | 484 | struct hard_iface *hard_iface = batadv_hardif_get_by_netdev(net_dev); |
32ae9b22 | 485 | struct hard_iface *primary_if = NULL; |
c6c8fea2 SE |
486 | struct bat_priv *bat_priv; |
487 | ||
e6c10f43 ML |
488 | if (!hard_iface && event == NETDEV_REGISTER) |
489 | hard_iface = hardif_add_interface(net_dev); | |
c6c8fea2 | 490 | |
e6c10f43 | 491 | if (!hard_iface) |
c6c8fea2 SE |
492 | goto out; |
493 | ||
494 | switch (event) { | |
495 | case NETDEV_UP: | |
e6c10f43 | 496 | hardif_activate_interface(hard_iface); |
c6c8fea2 SE |
497 | break; |
498 | case NETDEV_GOING_DOWN: | |
499 | case NETDEV_DOWN: | |
e6c10f43 | 500 | hardif_deactivate_interface(hard_iface); |
c6c8fea2 SE |
501 | break; |
502 | case NETDEV_UNREGISTER: | |
e6c10f43 | 503 | list_del_rcu(&hard_iface->list); |
c6c8fea2 | 504 | |
e6c10f43 | 505 | hardif_remove_interface(hard_iface); |
c6c8fea2 SE |
506 | break; |
507 | case NETDEV_CHANGEMTU: | |
e6c10f43 | 508 | if (hard_iface->soft_iface) |
9563877e | 509 | batadv_update_min_mtu(hard_iface->soft_iface); |
c6c8fea2 SE |
510 | break; |
511 | case NETDEV_CHANGEADDR: | |
e6c10f43 | 512 | if (hard_iface->if_status == IF_NOT_IN_USE) |
c6c8fea2 SE |
513 | goto hardif_put; |
514 | ||
e6c10f43 | 515 | check_known_mac_addr(hard_iface->net_dev); |
c6c8fea2 | 516 | |
e6c10f43 | 517 | bat_priv = netdev_priv(hard_iface->soft_iface); |
c3229398 | 518 | bat_priv->bat_algo_ops->bat_iface_update_mac(hard_iface); |
01c4224b | 519 | |
e5d89254 | 520 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 ML |
521 | if (!primary_if) |
522 | goto hardif_put; | |
523 | ||
524 | if (hard_iface == primary_if) | |
23721387 | 525 | primary_if_update_addr(bat_priv, NULL); |
c6c8fea2 SE |
526 | break; |
527 | default: | |
528 | break; | |
f81c6224 | 529 | } |
c6c8fea2 SE |
530 | |
531 | hardif_put: | |
e5d89254 | 532 | batadv_hardif_free_ref(hard_iface); |
c6c8fea2 | 533 | out: |
32ae9b22 | 534 | if (primary_if) |
e5d89254 | 535 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
536 | return NOTIFY_DONE; |
537 | } | |
538 | ||
bc279080 | 539 | /* This function returns true if the interface represented by ifindex is a |
9cfc7bd6 SE |
540 | * 802.11 wireless device |
541 | */ | |
9563877e | 542 | bool batadv_is_wifi_iface(int ifindex) |
bc279080 AQ |
543 | { |
544 | struct net_device *net_device = NULL; | |
545 | bool ret = false; | |
546 | ||
547 | if (ifindex == NULL_IFINDEX) | |
548 | goto out; | |
549 | ||
550 | net_device = dev_get_by_index(&init_net, ifindex); | |
551 | if (!net_device) | |
552 | goto out; | |
553 | ||
554 | #ifdef CONFIG_WIRELESS_EXT | |
555 | /* pre-cfg80211 drivers have to implement WEXT, so it is possible to | |
9cfc7bd6 SE |
556 | * check for wireless_handlers != NULL |
557 | */ | |
bc279080 AQ |
558 | if (net_device->wireless_handlers) |
559 | ret = true; | |
560 | else | |
561 | #endif | |
562 | /* cfg80211 drivers have to set ieee80211_ptr */ | |
563 | if (net_device->ieee80211_ptr) | |
564 | ret = true; | |
565 | out: | |
566 | if (net_device) | |
567 | dev_put(net_device); | |
568 | return ret; | |
569 | } | |
570 | ||
9563877e | 571 | struct notifier_block batadv_hard_if_notifier = { |
c6c8fea2 SE |
572 | .notifier_call = hard_if_event, |
573 | }; |