Commit | Line | Data |
---|---|---|
0046b040 | 1 | /* Copyright (C) 2007-2016 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 | |
ebf38fb7 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
c6c8fea2 SE |
16 | */ |
17 | ||
c6c8fea2 | 18 | #include "hard-interface.h" |
1e2c2a4f | 19 | #include "main.h" |
c6c8fea2 | 20 | |
7a659d56 | 21 | #include <linux/atomic.h> |
1e2c2a4f SE |
22 | #include <linux/bug.h> |
23 | #include <linux/byteorder/generic.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/fs.h> | |
fcafa5e7 | 26 | #include <linux/if.h> |
c6c8fea2 | 27 | #include <linux/if_arp.h> |
af5d4f77 | 28 | #include <linux/if_ether.h> |
1e2c2a4f | 29 | #include <linux/kernel.h> |
7a659d56 | 30 | #include <linux/kref.h> |
1e2c2a4f SE |
31 | #include <linux/list.h> |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/printk.h> | |
34 | #include <linux/rculist.h> | |
35 | #include <linux/rtnetlink.h> | |
36 | #include <linux/slab.h> | |
cef63419 | 37 | #include <linux/spinlock.h> |
275019d2 AL |
38 | #include <net/net_namespace.h> |
39 | #include <net/rtnetlink.h> | |
1e2c2a4f | 40 | |
a2d08166 | 41 | #include "bat_v.h" |
1e2c2a4f SE |
42 | #include "bridge_loop_avoidance.h" |
43 | #include "debugfs.h" | |
44 | #include "distributed-arp-table.h" | |
45 | #include "gateway_client.h" | |
ba412080 | 46 | #include "log.h" |
1e2c2a4f SE |
47 | #include "originator.h" |
48 | #include "packet.h" | |
49 | #include "send.h" | |
50 | #include "soft-interface.h" | |
51 | #include "sysfs.h" | |
52 | #include "translation-table.h" | |
c6c8fea2 | 53 | |
140ed8e8 SE |
54 | /** |
55 | * batadv_hardif_release - release hard interface from lists and queue for | |
56 | * free after rcu grace period | |
7a659d56 | 57 | * @ref: kref pointer of the hard interface |
140ed8e8 | 58 | */ |
7a659d56 | 59 | void batadv_hardif_release(struct kref *ref) |
c6c8fea2 | 60 | { |
7a659d56 SE |
61 | struct batadv_hard_iface *hard_iface; |
62 | ||
63 | hard_iface = container_of(ref, struct batadv_hard_iface, refcount); | |
e6c10f43 | 64 | dev_put(hard_iface->net_dev); |
140ed8e8 SE |
65 | |
66 | kfree_rcu(hard_iface, rcu); | |
c6c8fea2 SE |
67 | } |
68 | ||
56303d34 SE |
69 | struct batadv_hard_iface * |
70 | batadv_hardif_get_by_netdev(const struct net_device *net_dev) | |
c6c8fea2 | 71 | { |
56303d34 | 72 | struct batadv_hard_iface *hard_iface; |
c6c8fea2 SE |
73 | |
74 | rcu_read_lock(); | |
3193e8fd | 75 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e6c10f43 | 76 | if (hard_iface->net_dev == net_dev && |
7a659d56 | 77 | kref_get_unless_zero(&hard_iface->refcount)) |
c6c8fea2 SE |
78 | goto out; |
79 | } | |
80 | ||
e6c10f43 | 81 | hard_iface = NULL; |
c6c8fea2 SE |
82 | |
83 | out: | |
c6c8fea2 | 84 | rcu_read_unlock(); |
e6c10f43 | 85 | return hard_iface; |
c6c8fea2 SE |
86 | } |
87 | ||
275019d2 AL |
88 | /** |
89 | * batadv_getlink_net - return link net namespace (of use fallback) | |
90 | * @netdev: net_device to check | |
91 | * @fallback_net: return in case get_link_net is not available for @netdev | |
92 | * | |
93 | * Return: result of rtnl_link_ops->get_link_net or @fallback_net | |
94 | */ | |
88ffc7d0 SE |
95 | static struct net *batadv_getlink_net(const struct net_device *netdev, |
96 | struct net *fallback_net) | |
275019d2 AL |
97 | { |
98 | if (!netdev->rtnl_link_ops) | |
99 | return fallback_net; | |
100 | ||
101 | if (!netdev->rtnl_link_ops->get_link_net) | |
102 | return fallback_net; | |
103 | ||
104 | return netdev->rtnl_link_ops->get_link_net(netdev); | |
105 | } | |
106 | ||
1bc4e2b0 AL |
107 | /** |
108 | * batadv_mutual_parents - check if two devices are each others parent | |
275019d2 AL |
109 | * @dev1: 1st net dev |
110 | * @net1: 1st devices netns | |
111 | * @dev2: 2nd net dev | |
112 | * @net2: 2nd devices netns | |
1bc4e2b0 AL |
113 | * |
114 | * veth devices come in pairs and each is the parent of the other! | |
115 | * | |
116 | * Return: true if the devices are each others parent, otherwise false | |
117 | */ | |
118 | static bool batadv_mutual_parents(const struct net_device *dev1, | |
88ffc7d0 | 119 | struct net *net1, |
275019d2 | 120 | const struct net_device *dev2, |
88ffc7d0 | 121 | struct net *net2) |
1bc4e2b0 AL |
122 | { |
123 | int dev1_parent_iflink = dev_get_iflink(dev1); | |
124 | int dev2_parent_iflink = dev_get_iflink(dev2); | |
275019d2 AL |
125 | const struct net *dev1_parent_net; |
126 | const struct net *dev2_parent_net; | |
127 | ||
128 | dev1_parent_net = batadv_getlink_net(dev1, net1); | |
129 | dev2_parent_net = batadv_getlink_net(dev2, net2); | |
1bc4e2b0 AL |
130 | |
131 | if (!dev1_parent_iflink || !dev2_parent_iflink) | |
132 | return false; | |
133 | ||
134 | return (dev1_parent_iflink == dev2->ifindex) && | |
275019d2 AL |
135 | (dev2_parent_iflink == dev1->ifindex) && |
136 | net_eq(dev1_parent_net, net2) && | |
137 | net_eq(dev2_parent_net, net1); | |
1bc4e2b0 AL |
138 | } |
139 | ||
b7eddd0b AQ |
140 | /** |
141 | * batadv_is_on_batman_iface - check if a device is a batman iface descendant | |
142 | * @net_dev: the device to check | |
143 | * | |
144 | * If the user creates any virtual device on top of a batman-adv interface, it | |
145 | * is important to prevent this new interface to be used to create a new mesh | |
146 | * network (this behaviour would lead to a batman-over-batman configuration). | |
147 | * This function recursively checks all the fathers of the device passed as | |
148 | * argument looking for a batman-adv soft interface. | |
149 | * | |
62fe710f | 150 | * Return: true if the device is descendant of a batman-adv mesh interface (or |
b7eddd0b AQ |
151 | * if it is a batman-adv interface itself), false otherwise |
152 | */ | |
153 | static bool batadv_is_on_batman_iface(const struct net_device *net_dev) | |
154 | { | |
2cd45a06 | 155 | struct net *net = dev_net(net_dev); |
275019d2 | 156 | struct net_device *parent_dev; |
88ffc7d0 | 157 | struct net *parent_net; |
b7eddd0b AQ |
158 | bool ret; |
159 | ||
160 | /* check if this is a batman-adv mesh interface */ | |
161 | if (batadv_softif_is_valid(net_dev)) | |
162 | return true; | |
163 | ||
164 | /* no more parents..stop recursion */ | |
a54acb3a ND |
165 | if (dev_get_iflink(net_dev) == 0 || |
166 | dev_get_iflink(net_dev) == net_dev->ifindex) | |
b7eddd0b AQ |
167 | return false; |
168 | ||
275019d2 AL |
169 | parent_net = batadv_getlink_net(net_dev, net); |
170 | ||
b7eddd0b | 171 | /* recurse over the parent device */ |
275019d2 AL |
172 | parent_dev = __dev_get_by_index((struct net *)parent_net, |
173 | dev_get_iflink(net_dev)); | |
b7eddd0b AQ |
174 | /* if we got a NULL parent_dev there is something broken.. */ |
175 | if (WARN(!parent_dev, "Cannot find parent device")) | |
176 | return false; | |
177 | ||
275019d2 | 178 | if (batadv_mutual_parents(net_dev, net, parent_dev, parent_net)) |
1bc4e2b0 AL |
179 | return false; |
180 | ||
b7eddd0b AQ |
181 | ret = batadv_is_on_batman_iface(parent_dev); |
182 | ||
b7eddd0b AQ |
183 | return ret; |
184 | } | |
185 | ||
4b426b10 | 186 | static bool batadv_is_valid_iface(const struct net_device *net_dev) |
c6c8fea2 SE |
187 | { |
188 | if (net_dev->flags & IFF_LOOPBACK) | |
4b426b10 | 189 | return false; |
c6c8fea2 SE |
190 | |
191 | if (net_dev->type != ARPHRD_ETHER) | |
4b426b10 | 192 | return false; |
c6c8fea2 SE |
193 | |
194 | if (net_dev->addr_len != ETH_ALEN) | |
4b426b10 | 195 | return false; |
c6c8fea2 SE |
196 | |
197 | /* no batman over batman */ | |
b7eddd0b | 198 | if (batadv_is_on_batman_iface(net_dev)) |
4b426b10 | 199 | return false; |
c6c8fea2 | 200 | |
4b426b10 | 201 | return true; |
c6c8fea2 SE |
202 | } |
203 | ||
10b1bbb4 SE |
204 | /** |
205 | * batadv_is_wext_netdev - check if the given net_device struct is a | |
206 | * wext wifi interface | |
207 | * @net_device: the device to check | |
208 | * | |
209 | * Return: true if the net device is a wext wireless device, false | |
210 | * otherwise. | |
211 | */ | |
212 | static bool batadv_is_wext_netdev(struct net_device *net_device) | |
213 | { | |
214 | if (!net_device) | |
215 | return false; | |
216 | ||
217 | #ifdef CONFIG_WIRELESS_EXT | |
218 | /* pre-cfg80211 drivers have to implement WEXT, so it is possible to | |
219 | * check for wireless_handlers != NULL | |
220 | */ | |
221 | if (net_device->wireless_handlers) | |
222 | return true; | |
223 | #endif | |
224 | ||
225 | return false; | |
226 | } | |
227 | ||
f44a3ae9 ML |
228 | /** |
229 | * batadv_is_cfg80211_netdev - check if the given net_device struct is a | |
230 | * cfg80211 wifi interface | |
231 | * @net_device: the device to check | |
232 | * | |
233 | * Return: true if the net device is a cfg80211 wireless device, false | |
234 | * otherwise. | |
235 | */ | |
10b1bbb4 | 236 | static bool batadv_is_cfg80211_netdev(struct net_device *net_device) |
f44a3ae9 ML |
237 | { |
238 | if (!net_device) | |
239 | return false; | |
240 | ||
241 | /* cfg80211 drivers have to set ieee80211_ptr */ | |
242 | if (net_device->ieee80211_ptr) | |
243 | return true; | |
244 | ||
245 | return false; | |
246 | } | |
247 | ||
de68d100 | 248 | /** |
10b1bbb4 | 249 | * batadv_wifi_flags_evaluate - calculate wifi flags for net_device |
de68d100 MS |
250 | * @net_device: the device to check |
251 | * | |
10b1bbb4 SE |
252 | * Return: batadv_hard_iface_wifi_flags flags of the device |
253 | */ | |
254 | static u32 batadv_wifi_flags_evaluate(struct net_device *net_device) | |
255 | { | |
256 | u32 wifi_flags = 0; | |
257 | ||
258 | if (batadv_is_wext_netdev(net_device)) | |
259 | wifi_flags |= BATADV_HARDIF_WIFI_WEXT_DIRECT; | |
260 | ||
261 | if (batadv_is_cfg80211_netdev(net_device)) | |
262 | wifi_flags |= BATADV_HARDIF_WIFI_CFG80211_DIRECT; | |
263 | ||
264 | return wifi_flags; | |
265 | } | |
266 | ||
267 | /** | |
268 | * batadv_is_cfg80211_hardif - check if the given hardif is a cfg80211 wifi | |
269 | * interface | |
270 | * @hard_iface: the device to check | |
271 | * | |
272 | * Return: true if the net device is a cfg80211 wireless device, false | |
273 | * otherwise. | |
274 | */ | |
275 | bool batadv_is_cfg80211_hardif(struct batadv_hard_iface *hard_iface) | |
276 | { | |
277 | u32 allowed_flags = 0; | |
278 | ||
279 | allowed_flags |= BATADV_HARDIF_WIFI_CFG80211_DIRECT; | |
280 | ||
281 | return !!(hard_iface->wifi_flags & allowed_flags); | |
282 | } | |
283 | ||
284 | /** | |
285 | * batadv_is_wifi_hardif - check if the given hardif is a wifi interface | |
286 | * @hard_iface: the device to check | |
287 | * | |
62fe710f | 288 | * Return: true if the net device is a 802.11 wireless device, false otherwise. |
de68d100 | 289 | */ |
10b1bbb4 | 290 | bool batadv_is_wifi_hardif(struct batadv_hard_iface *hard_iface) |
de68d100 | 291 | { |
10b1bbb4 | 292 | if (!hard_iface) |
0c69aecc AQ |
293 | return false; |
294 | ||
10b1bbb4 | 295 | return hard_iface->wifi_flags != 0; |
de68d100 MS |
296 | } |
297 | ||
3111beed LL |
298 | /** |
299 | * batadv_hardif_no_broadcast - check whether (re)broadcast is necessary | |
300 | * @if_outgoing: the outgoing interface checked and considered for (re)broadcast | |
301 | * @orig_addr: the originator of this packet | |
302 | * @orig_neigh: originator address of the forwarder we just got the packet from | |
303 | * (NULL if we originated) | |
304 | * | |
305 | * Checks whether a packet needs to be (re)broadcasted on the given interface. | |
306 | * | |
307 | * Return: | |
308 | * BATADV_HARDIF_BCAST_NORECIPIENT: No neighbor on interface | |
309 | * BATADV_HARDIF_BCAST_DUPFWD: Just one neighbor, but it is the forwarder | |
310 | * BATADV_HARDIF_BCAST_DUPORIG: Just one neighbor, but it is the originator | |
311 | * BATADV_HARDIF_BCAST_OK: Several neighbors, must broadcast | |
312 | */ | |
313 | int batadv_hardif_no_broadcast(struct batadv_hard_iface *if_outgoing, | |
314 | u8 *orig_addr, u8 *orig_neigh) | |
315 | { | |
316 | struct batadv_hardif_neigh_node *hardif_neigh; | |
317 | struct hlist_node *first; | |
318 | int ret = BATADV_HARDIF_BCAST_OK; | |
319 | ||
320 | rcu_read_lock(); | |
321 | ||
322 | /* 0 neighbors -> no (re)broadcast */ | |
323 | first = rcu_dereference(hlist_first_rcu(&if_outgoing->neigh_list)); | |
324 | if (!first) { | |
325 | ret = BATADV_HARDIF_BCAST_NORECIPIENT; | |
326 | goto out; | |
327 | } | |
328 | ||
329 | /* >1 neighbors -> (re)brodcast */ | |
330 | if (rcu_dereference(hlist_next_rcu(first))) | |
331 | goto out; | |
332 | ||
333 | hardif_neigh = hlist_entry(first, struct batadv_hardif_neigh_node, | |
334 | list); | |
335 | ||
336 | /* 1 neighbor, is the originator -> no rebroadcast */ | |
337 | if (orig_addr && batadv_compare_eth(hardif_neigh->orig, orig_addr)) { | |
338 | ret = BATADV_HARDIF_BCAST_DUPORIG; | |
339 | /* 1 neighbor, is the one we received from -> no rebroadcast */ | |
340 | } else if (orig_neigh && | |
341 | batadv_compare_eth(hardif_neigh->orig, orig_neigh)) { | |
342 | ret = BATADV_HARDIF_BCAST_DUPFWD; | |
343 | } | |
344 | ||
345 | out: | |
346 | rcu_read_unlock(); | |
347 | return ret; | |
348 | } | |
349 | ||
56303d34 | 350 | static struct batadv_hard_iface * |
18a1cb6e | 351 | batadv_hardif_get_active(const struct net_device *soft_iface) |
c6c8fea2 | 352 | { |
56303d34 | 353 | struct batadv_hard_iface *hard_iface; |
c6c8fea2 SE |
354 | |
355 | rcu_read_lock(); | |
3193e8fd | 356 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e6c10f43 | 357 | if (hard_iface->soft_iface != soft_iface) |
c6c8fea2 SE |
358 | continue; |
359 | ||
e9a4f295 | 360 | if (hard_iface->if_status == BATADV_IF_ACTIVE && |
7a659d56 | 361 | kref_get_unless_zero(&hard_iface->refcount)) |
c6c8fea2 SE |
362 | goto out; |
363 | } | |
364 | ||
e6c10f43 | 365 | hard_iface = NULL; |
c6c8fea2 SE |
366 | |
367 | out: | |
c6c8fea2 | 368 | rcu_read_unlock(); |
e6c10f43 | 369 | return hard_iface; |
c6c8fea2 SE |
370 | } |
371 | ||
56303d34 SE |
372 | static void batadv_primary_if_update_addr(struct batadv_priv *bat_priv, |
373 | struct batadv_hard_iface *oldif) | |
c6c8fea2 | 374 | { |
56303d34 | 375 | struct batadv_hard_iface *primary_if; |
32ae9b22 | 376 | |
e5d89254 | 377 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 ML |
378 | if (!primary_if) |
379 | goto out; | |
c6c8fea2 | 380 | |
785ea114 | 381 | batadv_dat_init_own_addr(bat_priv, primary_if); |
08adf151 | 382 | batadv_bla_update_orig_address(bat_priv, primary_if, oldif); |
32ae9b22 ML |
383 | out: |
384 | if (primary_if) | |
82047ad7 | 385 | batadv_hardif_put(primary_if); |
c6c8fea2 SE |
386 | } |
387 | ||
56303d34 SE |
388 | static void batadv_primary_if_select(struct batadv_priv *bat_priv, |
389 | struct batadv_hard_iface *new_hard_iface) | |
c6c8fea2 | 390 | { |
56303d34 | 391 | struct batadv_hard_iface *curr_hard_iface; |
c6c8fea2 | 392 | |
c3caf519 | 393 | ASSERT_RTNL(); |
c6c8fea2 | 394 | |
17a86915 SE |
395 | if (new_hard_iface) |
396 | kref_get(&new_hard_iface->refcount); | |
c6c8fea2 | 397 | |
728cbc6a | 398 | curr_hard_iface = rcu_dereference_protected(bat_priv->primary_if, 1); |
32ae9b22 | 399 | rcu_assign_pointer(bat_priv->primary_if, new_hard_iface); |
c6c8fea2 | 400 | |
32ae9b22 | 401 | if (!new_hard_iface) |
23721387 | 402 | goto out; |
32ae9b22 | 403 | |
29824a55 | 404 | bat_priv->algo_ops->iface.primary_set(new_hard_iface); |
18a1cb6e | 405 | batadv_primary_if_update_addr(bat_priv, curr_hard_iface); |
23721387 SW |
406 | |
407 | out: | |
408 | if (curr_hard_iface) | |
82047ad7 | 409 | batadv_hardif_put(curr_hard_iface); |
c6c8fea2 SE |
410 | } |
411 | ||
56303d34 SE |
412 | static bool |
413 | batadv_hardif_is_iface_up(const struct batadv_hard_iface *hard_iface) | |
c6c8fea2 | 414 | { |
e6c10f43 | 415 | if (hard_iface->net_dev->flags & IFF_UP) |
c6c8fea2 SE |
416 | return true; |
417 | ||
418 | return false; | |
419 | } | |
420 | ||
18a1cb6e | 421 | static void batadv_check_known_mac_addr(const struct net_device *net_dev) |
c6c8fea2 | 422 | { |
56303d34 | 423 | const struct batadv_hard_iface *hard_iface; |
c6c8fea2 SE |
424 | |
425 | rcu_read_lock(); | |
3193e8fd | 426 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e9a4f295 SE |
427 | if ((hard_iface->if_status != BATADV_IF_ACTIVE) && |
428 | (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED)) | |
c6c8fea2 SE |
429 | continue; |
430 | ||
e6c10f43 | 431 | if (hard_iface->net_dev == net_dev) |
c6c8fea2 SE |
432 | continue; |
433 | ||
1eda58bf SE |
434 | if (!batadv_compare_eth(hard_iface->net_dev->dev_addr, |
435 | net_dev->dev_addr)) | |
c6c8fea2 SE |
436 | continue; |
437 | ||
67969581 SE |
438 | pr_warn("The newly added mac address (%pM) already exists on: %s\n", |
439 | net_dev->dev_addr, hard_iface->net_dev->name); | |
440 | pr_warn("It is strongly recommended to keep mac addresses unique to avoid problems!\n"); | |
c6c8fea2 SE |
441 | } |
442 | rcu_read_unlock(); | |
443 | } | |
444 | ||
7bca68c7 SE |
445 | /** |
446 | * batadv_hardif_recalc_extra_skbroom() - Recalculate skbuff extra head/tailroom | |
447 | * @soft_iface: netdev struct of the mesh interface | |
448 | */ | |
449 | static void batadv_hardif_recalc_extra_skbroom(struct net_device *soft_iface) | |
450 | { | |
451 | const struct batadv_hard_iface *hard_iface; | |
452 | unsigned short lower_header_len = ETH_HLEN; | |
453 | unsigned short lower_headroom = 0; | |
454 | unsigned short lower_tailroom = 0; | |
455 | unsigned short needed_headroom; | |
456 | ||
457 | rcu_read_lock(); | |
458 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
459 | if (hard_iface->if_status == BATADV_IF_NOT_IN_USE) | |
460 | continue; | |
461 | ||
462 | if (hard_iface->soft_iface != soft_iface) | |
463 | continue; | |
464 | ||
465 | lower_header_len = max_t(unsigned short, lower_header_len, | |
466 | hard_iface->net_dev->hard_header_len); | |
467 | ||
468 | lower_headroom = max_t(unsigned short, lower_headroom, | |
469 | hard_iface->net_dev->needed_headroom); | |
470 | ||
471 | lower_tailroom = max_t(unsigned short, lower_tailroom, | |
472 | hard_iface->net_dev->needed_tailroom); | |
473 | } | |
474 | rcu_read_unlock(); | |
475 | ||
476 | needed_headroom = lower_headroom + (lower_header_len - ETH_HLEN); | |
477 | needed_headroom += batadv_max_header_len(); | |
478 | ||
479 | soft_iface->needed_headroom = needed_headroom; | |
480 | soft_iface->needed_tailroom = lower_tailroom; | |
481 | } | |
482 | ||
9563877e | 483 | int batadv_hardif_min_mtu(struct net_device *soft_iface) |
c6c8fea2 | 484 | { |
a19d3d85 | 485 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
56303d34 | 486 | const struct batadv_hard_iface *hard_iface; |
930cd6e4 | 487 | int min_mtu = INT_MAX; |
c6c8fea2 SE |
488 | |
489 | rcu_read_lock(); | |
3193e8fd | 490 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e9a4f295 SE |
491 | if ((hard_iface->if_status != BATADV_IF_ACTIVE) && |
492 | (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED)) | |
c6c8fea2 SE |
493 | continue; |
494 | ||
e6c10f43 | 495 | if (hard_iface->soft_iface != soft_iface) |
c6c8fea2 SE |
496 | continue; |
497 | ||
a19d3d85 | 498 | min_mtu = min_t(int, hard_iface->net_dev->mtu, min_mtu); |
c6c8fea2 SE |
499 | } |
500 | rcu_read_unlock(); | |
a19d3d85 | 501 | |
a19d3d85 ML |
502 | if (atomic_read(&bat_priv->fragmentation) == 0) |
503 | goto out; | |
504 | ||
505 | /* with fragmentation enabled the maximum size of internally generated | |
506 | * packets such as translation table exchanges or tvlv containers, etc | |
507 | * has to be calculated | |
508 | */ | |
509 | min_mtu = min_t(int, min_mtu, BATADV_FRAG_MAX_FRAG_SIZE); | |
510 | min_mtu -= sizeof(struct batadv_frag_packet); | |
511 | min_mtu *= BATADV_FRAG_MAX_FRAGMENTS; | |
a19d3d85 | 512 | |
c6c8fea2 | 513 | out: |
930cd6e4 AQ |
514 | /* report to the other components the maximum amount of bytes that |
515 | * batman-adv can send over the wire (without considering the payload | |
516 | * overhead). For example, this value is used by TT to compute the | |
517 | * maximum local table table size | |
518 | */ | |
519 | atomic_set(&bat_priv->packet_size_max, min_mtu); | |
520 | ||
521 | /* the real soft-interface MTU is computed by removing the payload | |
522 | * overhead from the maximum amount of bytes that was just computed. | |
523 | * | |
524 | * However batman-adv does not support MTUs bigger than ETH_DATA_LEN | |
525 | */ | |
526 | return min_t(int, min_mtu - batadv_max_header_len(), ETH_DATA_LEN); | |
c6c8fea2 SE |
527 | } |
528 | ||
529 | /* adjusts the MTU if a new interface with a smaller MTU appeared. */ | |
9563877e | 530 | void batadv_update_min_mtu(struct net_device *soft_iface) |
c6c8fea2 | 531 | { |
a19d3d85 | 532 | soft_iface->mtu = batadv_hardif_min_mtu(soft_iface); |
c6c8fea2 | 533 | |
a19d3d85 ML |
534 | /* Check if the local translate table should be cleaned up to match a |
535 | * new (and smaller) MTU. | |
536 | */ | |
537 | batadv_tt_local_resize_to_mtu(soft_iface); | |
c6c8fea2 SE |
538 | } |
539 | ||
56303d34 SE |
540 | static void |
541 | batadv_hardif_activate_interface(struct batadv_hard_iface *hard_iface) | |
c6c8fea2 | 542 | { |
56303d34 SE |
543 | struct batadv_priv *bat_priv; |
544 | struct batadv_hard_iface *primary_if = NULL; | |
c6c8fea2 | 545 | |
e9a4f295 | 546 | if (hard_iface->if_status != BATADV_IF_INACTIVE) |
32ae9b22 | 547 | goto out; |
c6c8fea2 | 548 | |
e6c10f43 | 549 | bat_priv = netdev_priv(hard_iface->soft_iface); |
c6c8fea2 | 550 | |
29824a55 | 551 | bat_priv->algo_ops->iface.update_mac(hard_iface); |
e9a4f295 | 552 | hard_iface->if_status = BATADV_IF_TO_BE_ACTIVATED; |
c6c8fea2 | 553 | |
9cfc7bd6 | 554 | /* the first active interface becomes our primary interface or |
015758d0 | 555 | * the next active interface after the old primary interface was removed |
c6c8fea2 | 556 | */ |
e5d89254 | 557 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 558 | if (!primary_if) |
18a1cb6e | 559 | batadv_primary_if_select(bat_priv, hard_iface); |
c6c8fea2 | 560 | |
3e34819e SE |
561 | batadv_info(hard_iface->soft_iface, "Interface activated: %s\n", |
562 | hard_iface->net_dev->name); | |
c6c8fea2 | 563 | |
9563877e | 564 | batadv_update_min_mtu(hard_iface->soft_iface); |
32ae9b22 | 565 | |
29824a55 AQ |
566 | if (bat_priv->algo_ops->iface.activate) |
567 | bat_priv->algo_ops->iface.activate(hard_iface); | |
b6cf5d49 | 568 | |
32ae9b22 ML |
569 | out: |
570 | if (primary_if) | |
82047ad7 | 571 | batadv_hardif_put(primary_if); |
c6c8fea2 SE |
572 | } |
573 | ||
56303d34 SE |
574 | static void |
575 | batadv_hardif_deactivate_interface(struct batadv_hard_iface *hard_iface) | |
c6c8fea2 | 576 | { |
e9a4f295 SE |
577 | if ((hard_iface->if_status != BATADV_IF_ACTIVE) && |
578 | (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED)) | |
c6c8fea2 SE |
579 | return; |
580 | ||
e9a4f295 | 581 | hard_iface->if_status = BATADV_IF_INACTIVE; |
c6c8fea2 | 582 | |
3e34819e SE |
583 | batadv_info(hard_iface->soft_iface, "Interface deactivated: %s\n", |
584 | hard_iface->net_dev->name); | |
c6c8fea2 | 585 | |
9563877e | 586 | batadv_update_min_mtu(hard_iface->soft_iface); |
c6c8fea2 SE |
587 | } |
588 | ||
cb4b0d48 AQ |
589 | /** |
590 | * batadv_master_del_slave - remove hard_iface from the current master interface | |
591 | * @slave: the interface enslaved in another master | |
592 | * @master: the master from which slave has to be removed | |
593 | * | |
594 | * Invoke ndo_del_slave on master passing slave as argument. In this way slave | |
595 | * is free'd and master can correctly change its internal state. | |
62fe710f SE |
596 | * |
597 | * Return: 0 on success, a negative value representing the error otherwise | |
cb4b0d48 AQ |
598 | */ |
599 | static int batadv_master_del_slave(struct batadv_hard_iface *slave, | |
600 | struct net_device *master) | |
601 | { | |
602 | int ret; | |
603 | ||
604 | if (!master) | |
605 | return 0; | |
606 | ||
607 | ret = -EBUSY; | |
608 | if (master->netdev_ops->ndo_del_slave) | |
609 | ret = master->netdev_ops->ndo_del_slave(master, slave->net_dev); | |
610 | ||
611 | return ret; | |
612 | } | |
613 | ||
56303d34 | 614 | int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, |
2cd45a06 | 615 | struct net *net, const char *iface_name) |
c6c8fea2 | 616 | { |
56303d34 | 617 | struct batadv_priv *bat_priv; |
cb4b0d48 | 618 | struct net_device *soft_iface, *master; |
293e9338 | 619 | __be16 ethertype = htons(ETH_P_BATMAN); |
411d6ed9 | 620 | int max_header_len = batadv_max_header_len(); |
e44d8fe2 | 621 | int ret; |
c6c8fea2 | 622 | |
e9a4f295 | 623 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
624 | goto out; |
625 | ||
17a86915 | 626 | kref_get(&hard_iface->refcount); |
ed75ccbe | 627 | |
2cd45a06 | 628 | soft_iface = dev_get_by_name(net, iface_name); |
c6c8fea2 | 629 | |
e44d8fe2 | 630 | if (!soft_iface) { |
2cd45a06 | 631 | soft_iface = batadv_softif_create(net, iface_name); |
c6c8fea2 | 632 | |
e44d8fe2 SE |
633 | if (!soft_iface) { |
634 | ret = -ENOMEM; | |
c6c8fea2 | 635 | goto err; |
e44d8fe2 | 636 | } |
c6c8fea2 SE |
637 | |
638 | /* dev_get_by_name() increases the reference counter for us */ | |
e44d8fe2 SE |
639 | dev_hold(soft_iface); |
640 | } | |
641 | ||
04b482a2 | 642 | if (!batadv_softif_is_valid(soft_iface)) { |
86ceb360 | 643 | pr_err("Can't create batman mesh interface %s: already exists as regular interface\n", |
e44d8fe2 | 644 | soft_iface->name); |
e44d8fe2 | 645 | ret = -EINVAL; |
77af7575 | 646 | goto err_dev; |
c6c8fea2 SE |
647 | } |
648 | ||
cb4b0d48 AQ |
649 | /* check if the interface is enslaved in another virtual one and |
650 | * in that case unlink it first | |
651 | */ | |
652 | master = netdev_master_upper_dev_get(hard_iface->net_dev); | |
653 | ret = batadv_master_del_slave(hard_iface, master); | |
654 | if (ret) | |
655 | goto err_dev; | |
656 | ||
e44d8fe2 | 657 | hard_iface->soft_iface = soft_iface; |
e6c10f43 | 658 | bat_priv = netdev_priv(hard_iface->soft_iface); |
d0b9fd89 | 659 | |
6dffb044 | 660 | ret = netdev_master_upper_dev_link(hard_iface->net_dev, |
29bf24af | 661 | soft_iface, NULL, NULL); |
3dbd550b SE |
662 | if (ret) |
663 | goto err_dev; | |
664 | ||
29824a55 | 665 | ret = bat_priv->algo_ops->iface.enable(hard_iface); |
5346c35e | 666 | if (ret < 0) |
3dbd550b | 667 | goto err_upper; |
c6c8fea2 | 668 | |
e6c10f43 | 669 | hard_iface->if_num = bat_priv->num_ifaces; |
c6c8fea2 | 670 | bat_priv->num_ifaces++; |
e9a4f295 | 671 | hard_iface->if_status = BATADV_IF_INACTIVE; |
62446307 SW |
672 | ret = batadv_orig_hash_add_if(hard_iface, bat_priv->num_ifaces); |
673 | if (ret < 0) { | |
29824a55 | 674 | bat_priv->algo_ops->iface.disable(hard_iface); |
62446307 SW |
675 | bat_priv->num_ifaces--; |
676 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; | |
3dbd550b | 677 | goto err_upper; |
62446307 | 678 | } |
c6c8fea2 | 679 | |
d7d6de95 | 680 | kref_get(&hard_iface->refcount); |
7e071c79 | 681 | hard_iface->batman_adv_ptype.type = ethertype; |
3193e8fd | 682 | hard_iface->batman_adv_ptype.func = batadv_batman_skb_recv; |
e6c10f43 ML |
683 | hard_iface->batman_adv_ptype.dev = hard_iface->net_dev; |
684 | dev_add_pack(&hard_iface->batman_adv_ptype); | |
c6c8fea2 | 685 | |
3e34819e SE |
686 | batadv_info(hard_iface->soft_iface, "Adding interface: %s\n", |
687 | hard_iface->net_dev->name); | |
c6c8fea2 | 688 | |
0aca2369 | 689 | if (atomic_read(&bat_priv->fragmentation) && |
411d6ed9 | 690 | hard_iface->net_dev->mtu < ETH_DATA_LEN + max_header_len) |
3e34819e | 691 | batadv_info(hard_iface->soft_iface, |
411d6ed9 | 692 | "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 %i would solve the problem.\n", |
3e34819e | 693 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
411d6ed9 | 694 | ETH_DATA_LEN + max_header_len); |
c6c8fea2 | 695 | |
0aca2369 | 696 | if (!atomic_read(&bat_priv->fragmentation) && |
411d6ed9 | 697 | hard_iface->net_dev->mtu < ETH_DATA_LEN + max_header_len) |
3e34819e | 698 | batadv_info(hard_iface->soft_iface, |
411d6ed9 | 699 | "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 %i.\n", |
3e34819e | 700 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
411d6ed9 | 701 | ETH_DATA_LEN + max_header_len); |
c6c8fea2 | 702 | |
18a1cb6e SE |
703 | if (batadv_hardif_is_iface_up(hard_iface)) |
704 | batadv_hardif_activate_interface(hard_iface); | |
c6c8fea2 | 705 | else |
3e34819e SE |
706 | batadv_err(hard_iface->soft_iface, |
707 | "Not using interface %s (retrying later): interface not active\n", | |
708 | hard_iface->net_dev->name); | |
c6c8fea2 | 709 | |
7bca68c7 SE |
710 | batadv_hardif_recalc_extra_skbroom(soft_iface); |
711 | ||
c6c8fea2 SE |
712 | out: |
713 | return 0; | |
714 | ||
3dbd550b SE |
715 | err_upper: |
716 | netdev_upper_dev_unlink(hard_iface->net_dev, soft_iface); | |
77af7575 | 717 | err_dev: |
3dbd550b | 718 | hard_iface->soft_iface = NULL; |
77af7575 | 719 | dev_put(soft_iface); |
c6c8fea2 | 720 | err: |
82047ad7 | 721 | batadv_hardif_put(hard_iface); |
e44d8fe2 | 722 | return ret; |
c6c8fea2 SE |
723 | } |
724 | ||
a15fd361 SE |
725 | void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface, |
726 | enum batadv_hard_if_cleanup autodel) | |
c6c8fea2 | 727 | { |
56303d34 SE |
728 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
729 | struct batadv_hard_iface *primary_if = NULL; | |
c6c8fea2 | 730 | |
f2d23861 | 731 | batadv_hardif_deactivate_interface(hard_iface); |
c6c8fea2 | 732 | |
e9a4f295 | 733 | if (hard_iface->if_status != BATADV_IF_INACTIVE) |
32ae9b22 | 734 | goto out; |
c6c8fea2 | 735 | |
3e34819e SE |
736 | batadv_info(hard_iface->soft_iface, "Removing interface: %s\n", |
737 | hard_iface->net_dev->name); | |
e6c10f43 | 738 | dev_remove_pack(&hard_iface->batman_adv_ptype); |
d7d6de95 | 739 | batadv_hardif_put(hard_iface); |
c6c8fea2 SE |
740 | |
741 | bat_priv->num_ifaces--; | |
7d211efc | 742 | batadv_orig_hash_del_if(hard_iface, bat_priv->num_ifaces); |
c6c8fea2 | 743 | |
e5d89254 | 744 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 745 | if (hard_iface == primary_if) { |
56303d34 | 746 | struct batadv_hard_iface *new_if; |
c6c8fea2 | 747 | |
18a1cb6e SE |
748 | new_if = batadv_hardif_get_active(hard_iface->soft_iface); |
749 | batadv_primary_if_select(bat_priv, new_if); | |
c6c8fea2 SE |
750 | |
751 | if (new_if) | |
82047ad7 | 752 | batadv_hardif_put(new_if); |
c6c8fea2 SE |
753 | } |
754 | ||
29824a55 | 755 | bat_priv->algo_ops->iface.disable(hard_iface); |
e9a4f295 | 756 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; |
c6c8fea2 | 757 | |
e6c10f43 | 758 | /* delete all references to this hard_iface */ |
7d211efc | 759 | batadv_purge_orig_ref(bat_priv); |
9455e34c | 760 | batadv_purge_outstanding_packets(bat_priv, hard_iface); |
e6c10f43 | 761 | dev_put(hard_iface->soft_iface); |
c6c8fea2 | 762 | |
a5256f7e | 763 | netdev_upper_dev_unlink(hard_iface->net_dev, hard_iface->soft_iface); |
7bca68c7 | 764 | batadv_hardif_recalc_extra_skbroom(hard_iface->soft_iface); |
a5256f7e | 765 | |
c6c8fea2 | 766 | /* nobody uses this interface anymore */ |
8257f55a AQ |
767 | if (!bat_priv->num_ifaces) { |
768 | batadv_gw_check_client_stop(bat_priv); | |
769 | ||
770 | if (autodel == BATADV_IF_CLEANUP_AUTO) | |
771 | batadv_softif_destroy_sysfs(hard_iface->soft_iface); | |
772 | } | |
c6c8fea2 | 773 | |
e6c10f43 | 774 | hard_iface->soft_iface = NULL; |
82047ad7 | 775 | batadv_hardif_put(hard_iface); |
32ae9b22 ML |
776 | |
777 | out: | |
778 | if (primary_if) | |
82047ad7 | 779 | batadv_hardif_put(primary_if); |
c6c8fea2 SE |
780 | } |
781 | ||
56303d34 | 782 | static struct batadv_hard_iface * |
18a1cb6e | 783 | batadv_hardif_add_interface(struct net_device *net_dev) |
c6c8fea2 | 784 | { |
56303d34 | 785 | struct batadv_hard_iface *hard_iface; |
c6c8fea2 SE |
786 | int ret; |
787 | ||
c3caf519 SE |
788 | ASSERT_RTNL(); |
789 | ||
4b426b10 | 790 | if (!batadv_is_valid_iface(net_dev)) |
c6c8fea2 SE |
791 | goto out; |
792 | ||
793 | dev_hold(net_dev); | |
794 | ||
7db3fc29 | 795 | hard_iface = kzalloc(sizeof(*hard_iface), GFP_ATOMIC); |
320f422f | 796 | if (!hard_iface) |
c6c8fea2 | 797 | goto release_dev; |
c6c8fea2 | 798 | |
5853e22c | 799 | ret = batadv_sysfs_add_hardif(&hard_iface->hardif_obj, net_dev); |
c6c8fea2 SE |
800 | if (ret) |
801 | goto free_if; | |
802 | ||
e6c10f43 ML |
803 | hard_iface->if_num = -1; |
804 | hard_iface->net_dev = net_dev; | |
805 | hard_iface->soft_iface = NULL; | |
e9a4f295 | 806 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; |
5bc7c1eb SW |
807 | |
808 | ret = batadv_debugfs_add_hardif(hard_iface); | |
809 | if (ret) | |
810 | goto free_sysfs; | |
811 | ||
e6c10f43 | 812 | INIT_LIST_HEAD(&hard_iface->list); |
cef63419 | 813 | INIT_HLIST_HEAD(&hard_iface->neigh_list); |
5bc44dc8 | 814 | |
cef63419 | 815 | spin_lock_init(&hard_iface->neigh_list_lock); |
b2367e46 | 816 | kref_init(&hard_iface->refcount); |
cef63419 | 817 | |
caf65bfc | 818 | hard_iface->num_bcasts = BATADV_NUM_BCASTS_DEFAULT; |
10b1bbb4 SE |
819 | hard_iface->wifi_flags = batadv_wifi_flags_evaluate(net_dev); |
820 | if (batadv_is_wifi_hardif(hard_iface)) | |
caf65bfc MS |
821 | hard_iface->num_bcasts = BATADV_NUM_BCASTS_WIRELESS; |
822 | ||
7db682d1 ML |
823 | batadv_v_hardif_init(hard_iface); |
824 | ||
18a1cb6e | 825 | batadv_check_known_mac_addr(hard_iface->net_dev); |
b2367e46 | 826 | kref_get(&hard_iface->refcount); |
3193e8fd | 827 | list_add_tail_rcu(&hard_iface->list, &batadv_hardif_list); |
c6c8fea2 | 828 | |
e6c10f43 | 829 | return hard_iface; |
c6c8fea2 | 830 | |
5bc7c1eb SW |
831 | free_sysfs: |
832 | batadv_sysfs_del_hardif(&hard_iface->hardif_obj); | |
c6c8fea2 | 833 | free_if: |
e6c10f43 | 834 | kfree(hard_iface); |
c6c8fea2 SE |
835 | release_dev: |
836 | dev_put(net_dev); | |
837 | out: | |
838 | return NULL; | |
839 | } | |
840 | ||
56303d34 | 841 | static void batadv_hardif_remove_interface(struct batadv_hard_iface *hard_iface) |
c6c8fea2 | 842 | { |
c3caf519 SE |
843 | ASSERT_RTNL(); |
844 | ||
c6c8fea2 | 845 | /* first deactivate interface */ |
e9a4f295 | 846 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
a15fd361 | 847 | batadv_hardif_disable_interface(hard_iface, |
06d640c9 | 848 | BATADV_IF_CLEANUP_KEEP); |
c6c8fea2 | 849 | |
e9a4f295 | 850 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
851 | return; |
852 | ||
e9a4f295 | 853 | hard_iface->if_status = BATADV_IF_TO_BE_REMOVED; |
569c9850 SE |
854 | batadv_debugfs_del_hardif(hard_iface); |
855 | batadv_sysfs_del_hardif(&hard_iface->hardif_obj); | |
856 | batadv_hardif_put(hard_iface); | |
c6c8fea2 SE |
857 | } |
858 | ||
9563877e | 859 | void batadv_hardif_remove_interfaces(void) |
c6c8fea2 | 860 | { |
56303d34 | 861 | struct batadv_hard_iface *hard_iface, *hard_iface_tmp; |
c6c8fea2 | 862 | |
c3caf519 | 863 | rtnl_lock(); |
e6c10f43 | 864 | list_for_each_entry_safe(hard_iface, hard_iface_tmp, |
3193e8fd | 865 | &batadv_hardif_list, list) { |
e6c10f43 | 866 | list_del_rcu(&hard_iface->list); |
18a1cb6e | 867 | batadv_hardif_remove_interface(hard_iface); |
c6c8fea2 SE |
868 | } |
869 | rtnl_unlock(); | |
870 | } | |
871 | ||
18a1cb6e SE |
872 | static int batadv_hard_if_event(struct notifier_block *this, |
873 | unsigned long event, void *ptr) | |
c6c8fea2 | 874 | { |
351638e7 | 875 | struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); |
56303d34 SE |
876 | struct batadv_hard_iface *hard_iface; |
877 | struct batadv_hard_iface *primary_if = NULL; | |
878 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 879 | |
37130293 SE |
880 | if (batadv_softif_is_valid(net_dev) && event == NETDEV_REGISTER) { |
881 | batadv_sysfs_add_meshif(net_dev); | |
5d2c05b2 AQ |
882 | bat_priv = netdev_priv(net_dev); |
883 | batadv_softif_create_vlan(bat_priv, BATADV_NO_FLAGS); | |
37130293 SE |
884 | return NOTIFY_DONE; |
885 | } | |
886 | ||
56303d34 | 887 | hard_iface = batadv_hardif_get_by_netdev(net_dev); |
a1a66b11 AL |
888 | if (!hard_iface && (event == NETDEV_REGISTER || |
889 | event == NETDEV_POST_TYPE_CHANGE)) | |
18a1cb6e | 890 | hard_iface = batadv_hardif_add_interface(net_dev); |
c6c8fea2 | 891 | |
e6c10f43 | 892 | if (!hard_iface) |
c6c8fea2 SE |
893 | goto out; |
894 | ||
895 | switch (event) { | |
896 | case NETDEV_UP: | |
18a1cb6e | 897 | batadv_hardif_activate_interface(hard_iface); |
c6c8fea2 SE |
898 | break; |
899 | case NETDEV_GOING_DOWN: | |
900 | case NETDEV_DOWN: | |
18a1cb6e | 901 | batadv_hardif_deactivate_interface(hard_iface); |
c6c8fea2 SE |
902 | break; |
903 | case NETDEV_UNREGISTER: | |
a1a66b11 | 904 | case NETDEV_PRE_TYPE_CHANGE: |
e6c10f43 | 905 | list_del_rcu(&hard_iface->list); |
c6c8fea2 | 906 | |
18a1cb6e | 907 | batadv_hardif_remove_interface(hard_iface); |
c6c8fea2 SE |
908 | break; |
909 | case NETDEV_CHANGEMTU: | |
e6c10f43 | 910 | if (hard_iface->soft_iface) |
9563877e | 911 | batadv_update_min_mtu(hard_iface->soft_iface); |
c6c8fea2 SE |
912 | break; |
913 | case NETDEV_CHANGEADDR: | |
e9a4f295 | 914 | if (hard_iface->if_status == BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
915 | goto hardif_put; |
916 | ||
18a1cb6e | 917 | batadv_check_known_mac_addr(hard_iface->net_dev); |
c6c8fea2 | 918 | |
e6c10f43 | 919 | bat_priv = netdev_priv(hard_iface->soft_iface); |
29824a55 | 920 | bat_priv->algo_ops->iface.update_mac(hard_iface); |
01c4224b | 921 | |
e5d89254 | 922 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 ML |
923 | if (!primary_if) |
924 | goto hardif_put; | |
925 | ||
926 | if (hard_iface == primary_if) | |
18a1cb6e | 927 | batadv_primary_if_update_addr(bat_priv, NULL); |
c6c8fea2 SE |
928 | break; |
929 | default: | |
930 | break; | |
f81c6224 | 931 | } |
c6c8fea2 SE |
932 | |
933 | hardif_put: | |
82047ad7 | 934 | batadv_hardif_put(hard_iface); |
c6c8fea2 | 935 | out: |
32ae9b22 | 936 | if (primary_if) |
82047ad7 | 937 | batadv_hardif_put(primary_if); |
c6c8fea2 SE |
938 | return NOTIFY_DONE; |
939 | } | |
940 | ||
9563877e | 941 | struct notifier_block batadv_hard_if_notifier = { |
18a1cb6e | 942 | .notifier_call = batadv_hard_if_event, |
c6c8fea2 | 943 | }; |