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ac79cbb9 | 1 | /* Copyright (C) 2007-2017 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 | ||
de68d100 | 204 | /** |
5ed4a460 ML |
205 | * batadv_get_real_netdevice - check if the given netdev struct is a virtual |
206 | * interface on top of another 'real' interface | |
207 | * @netdev: the device to check | |
208 | * | |
1942de1b ML |
209 | * Callers must hold the rtnl semaphore. You may want batadv_get_real_netdev() |
210 | * instead of this. | |
211 | * | |
5ed4a460 ML |
212 | * Return: the 'real' net device or the original net device and NULL in case |
213 | * of an error. | |
214 | */ | |
215 | static struct net_device *batadv_get_real_netdevice(struct net_device *netdev) | |
216 | { | |
217 | struct batadv_hard_iface *hard_iface = NULL; | |
218 | struct net_device *real_netdev = NULL; | |
219 | struct net *real_net; | |
220 | struct net *net; | |
221 | int ifindex; | |
222 | ||
223 | ASSERT_RTNL(); | |
224 | ||
225 | if (!netdev) | |
226 | return NULL; | |
227 | ||
228 | if (netdev->ifindex == dev_get_iflink(netdev)) { | |
229 | dev_hold(netdev); | |
230 | return netdev; | |
231 | } | |
232 | ||
233 | hard_iface = batadv_hardif_get_by_netdev(netdev); | |
234 | if (!hard_iface || !hard_iface->soft_iface) | |
235 | goto out; | |
236 | ||
237 | net = dev_net(hard_iface->soft_iface); | |
238 | ifindex = dev_get_iflink(netdev); | |
239 | real_net = batadv_getlink_net(netdev, net); | |
240 | real_netdev = dev_get_by_index(real_net, ifindex); | |
241 | ||
242 | out: | |
243 | if (hard_iface) | |
244 | batadv_hardif_put(hard_iface); | |
245 | return real_netdev; | |
246 | } | |
247 | ||
1942de1b ML |
248 | /** |
249 | * batadv_get_real_netdev - check if the given net_device struct is a virtual | |
250 | * interface on top of another 'real' interface | |
de68d100 MS |
251 | * @net_device: the device to check |
252 | * | |
1942de1b ML |
253 | * Return: the 'real' net device or the original net device and NULL in case |
254 | * of an error. | |
de68d100 | 255 | */ |
1942de1b ML |
256 | struct net_device *batadv_get_real_netdev(struct net_device *net_device) |
257 | { | |
258 | struct net_device *real_netdev; | |
259 | ||
260 | rtnl_lock(); | |
261 | real_netdev = batadv_get_real_netdevice(net_device); | |
262 | rtnl_unlock(); | |
263 | ||
264 | return real_netdev; | |
265 | } | |
266 | ||
10b1bbb4 SE |
267 | /** |
268 | * batadv_is_wext_netdev - check if the given net_device struct is a | |
269 | * wext wifi interface | |
270 | * @net_device: the device to check | |
271 | * | |
272 | * Return: true if the net device is a wext wireless device, false | |
273 | * otherwise. | |
274 | */ | |
275 | static bool batadv_is_wext_netdev(struct net_device *net_device) | |
de68d100 | 276 | { |
0c69aecc AQ |
277 | if (!net_device) |
278 | return false; | |
279 | ||
de68d100 MS |
280 | #ifdef CONFIG_WIRELESS_EXT |
281 | /* pre-cfg80211 drivers have to implement WEXT, so it is possible to | |
282 | * check for wireless_handlers != NULL | |
283 | */ | |
284 | if (net_device->wireless_handlers) | |
285 | return true; | |
286 | #endif | |
287 | ||
10b1bbb4 SE |
288 | return false; |
289 | } | |
290 | ||
f44a3ae9 ML |
291 | /** |
292 | * batadv_is_cfg80211_netdev - check if the given net_device struct is a | |
293 | * cfg80211 wifi interface | |
294 | * @net_device: the device to check | |
295 | * | |
296 | * Return: true if the net device is a cfg80211 wireless device, false | |
297 | * otherwise. | |
298 | */ | |
10b1bbb4 | 299 | static bool batadv_is_cfg80211_netdev(struct net_device *net_device) |
f44a3ae9 ML |
300 | { |
301 | if (!net_device) | |
302 | return false; | |
303 | ||
de68d100 MS |
304 | /* cfg80211 drivers have to set ieee80211_ptr */ |
305 | if (net_device->ieee80211_ptr) | |
306 | return true; | |
307 | ||
308 | return false; | |
309 | } | |
310 | ||
de68d100 | 311 | /** |
10b1bbb4 | 312 | * batadv_wifi_flags_evaluate - calculate wifi flags for net_device |
de68d100 MS |
313 | * @net_device: the device to check |
314 | * | |
10b1bbb4 SE |
315 | * Return: batadv_hard_iface_wifi_flags flags of the device |
316 | */ | |
317 | static u32 batadv_wifi_flags_evaluate(struct net_device *net_device) | |
318 | { | |
319 | u32 wifi_flags = 0; | |
5ed4a460 | 320 | struct net_device *real_netdev; |
10b1bbb4 SE |
321 | |
322 | if (batadv_is_wext_netdev(net_device)) | |
323 | wifi_flags |= BATADV_HARDIF_WIFI_WEXT_DIRECT; | |
324 | ||
325 | if (batadv_is_cfg80211_netdev(net_device)) | |
326 | wifi_flags |= BATADV_HARDIF_WIFI_CFG80211_DIRECT; | |
327 | ||
5ed4a460 ML |
328 | real_netdev = batadv_get_real_netdevice(net_device); |
329 | if (!real_netdev) | |
330 | return wifi_flags; | |
331 | ||
332 | if (real_netdev == net_device) | |
333 | goto out; | |
334 | ||
335 | if (batadv_is_wext_netdev(real_netdev)) | |
336 | wifi_flags |= BATADV_HARDIF_WIFI_WEXT_INDIRECT; | |
337 | ||
338 | if (batadv_is_cfg80211_netdev(real_netdev)) | |
339 | wifi_flags |= BATADV_HARDIF_WIFI_CFG80211_INDIRECT; | |
340 | ||
341 | out: | |
342 | dev_put(real_netdev); | |
10b1bbb4 SE |
343 | return wifi_flags; |
344 | } | |
345 | ||
346 | /** | |
347 | * batadv_is_cfg80211_hardif - check if the given hardif is a cfg80211 wifi | |
348 | * interface | |
349 | * @hard_iface: the device to check | |
350 | * | |
351 | * Return: true if the net device is a cfg80211 wireless device, false | |
352 | * otherwise. | |
353 | */ | |
354 | bool batadv_is_cfg80211_hardif(struct batadv_hard_iface *hard_iface) | |
355 | { | |
356 | u32 allowed_flags = 0; | |
357 | ||
358 | allowed_flags |= BATADV_HARDIF_WIFI_CFG80211_DIRECT; | |
5ed4a460 | 359 | allowed_flags |= BATADV_HARDIF_WIFI_CFG80211_INDIRECT; |
10b1bbb4 SE |
360 | |
361 | return !!(hard_iface->wifi_flags & allowed_flags); | |
362 | } | |
363 | ||
364 | /** | |
365 | * batadv_is_wifi_hardif - check if the given hardif is a wifi interface | |
366 | * @hard_iface: the device to check | |
367 | * | |
62fe710f | 368 | * Return: true if the net device is a 802.11 wireless device, false otherwise. |
de68d100 | 369 | */ |
10b1bbb4 | 370 | bool batadv_is_wifi_hardif(struct batadv_hard_iface *hard_iface) |
de68d100 | 371 | { |
10b1bbb4 | 372 | if (!hard_iface) |
0c69aecc AQ |
373 | return false; |
374 | ||
10b1bbb4 | 375 | return hard_iface->wifi_flags != 0; |
de68d100 MS |
376 | } |
377 | ||
3111beed LL |
378 | /** |
379 | * batadv_hardif_no_broadcast - check whether (re)broadcast is necessary | |
380 | * @if_outgoing: the outgoing interface checked and considered for (re)broadcast | |
381 | * @orig_addr: the originator of this packet | |
382 | * @orig_neigh: originator address of the forwarder we just got the packet from | |
383 | * (NULL if we originated) | |
384 | * | |
385 | * Checks whether a packet needs to be (re)broadcasted on the given interface. | |
386 | * | |
387 | * Return: | |
388 | * BATADV_HARDIF_BCAST_NORECIPIENT: No neighbor on interface | |
389 | * BATADV_HARDIF_BCAST_DUPFWD: Just one neighbor, but it is the forwarder | |
390 | * BATADV_HARDIF_BCAST_DUPORIG: Just one neighbor, but it is the originator | |
391 | * BATADV_HARDIF_BCAST_OK: Several neighbors, must broadcast | |
392 | */ | |
393 | int batadv_hardif_no_broadcast(struct batadv_hard_iface *if_outgoing, | |
394 | u8 *orig_addr, u8 *orig_neigh) | |
395 | { | |
396 | struct batadv_hardif_neigh_node *hardif_neigh; | |
397 | struct hlist_node *first; | |
398 | int ret = BATADV_HARDIF_BCAST_OK; | |
399 | ||
400 | rcu_read_lock(); | |
401 | ||
402 | /* 0 neighbors -> no (re)broadcast */ | |
403 | first = rcu_dereference(hlist_first_rcu(&if_outgoing->neigh_list)); | |
404 | if (!first) { | |
405 | ret = BATADV_HARDIF_BCAST_NORECIPIENT; | |
406 | goto out; | |
407 | } | |
408 | ||
409 | /* >1 neighbors -> (re)brodcast */ | |
410 | if (rcu_dereference(hlist_next_rcu(first))) | |
411 | goto out; | |
412 | ||
413 | hardif_neigh = hlist_entry(first, struct batadv_hardif_neigh_node, | |
414 | list); | |
415 | ||
416 | /* 1 neighbor, is the originator -> no rebroadcast */ | |
417 | if (orig_addr && batadv_compare_eth(hardif_neigh->orig, orig_addr)) { | |
418 | ret = BATADV_HARDIF_BCAST_DUPORIG; | |
419 | /* 1 neighbor, is the one we received from -> no rebroadcast */ | |
420 | } else if (orig_neigh && | |
421 | batadv_compare_eth(hardif_neigh->orig, orig_neigh)) { | |
422 | ret = BATADV_HARDIF_BCAST_DUPFWD; | |
423 | } | |
424 | ||
425 | out: | |
426 | rcu_read_unlock(); | |
427 | return ret; | |
428 | } | |
429 | ||
56303d34 | 430 | static struct batadv_hard_iface * |
18a1cb6e | 431 | batadv_hardif_get_active(const struct net_device *soft_iface) |
c6c8fea2 | 432 | { |
56303d34 | 433 | struct batadv_hard_iface *hard_iface; |
c6c8fea2 SE |
434 | |
435 | rcu_read_lock(); | |
3193e8fd | 436 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e6c10f43 | 437 | if (hard_iface->soft_iface != soft_iface) |
c6c8fea2 SE |
438 | continue; |
439 | ||
e9a4f295 | 440 | if (hard_iface->if_status == BATADV_IF_ACTIVE && |
7a659d56 | 441 | kref_get_unless_zero(&hard_iface->refcount)) |
c6c8fea2 SE |
442 | goto out; |
443 | } | |
444 | ||
e6c10f43 | 445 | hard_iface = NULL; |
c6c8fea2 SE |
446 | |
447 | out: | |
c6c8fea2 | 448 | rcu_read_unlock(); |
e6c10f43 | 449 | return hard_iface; |
c6c8fea2 SE |
450 | } |
451 | ||
56303d34 SE |
452 | static void batadv_primary_if_update_addr(struct batadv_priv *bat_priv, |
453 | struct batadv_hard_iface *oldif) | |
c6c8fea2 | 454 | { |
56303d34 | 455 | struct batadv_hard_iface *primary_if; |
32ae9b22 | 456 | |
e5d89254 | 457 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 ML |
458 | if (!primary_if) |
459 | goto out; | |
c6c8fea2 | 460 | |
785ea114 | 461 | batadv_dat_init_own_addr(bat_priv, primary_if); |
08adf151 | 462 | batadv_bla_update_orig_address(bat_priv, primary_if, oldif); |
32ae9b22 ML |
463 | out: |
464 | if (primary_if) | |
82047ad7 | 465 | batadv_hardif_put(primary_if); |
c6c8fea2 SE |
466 | } |
467 | ||
56303d34 SE |
468 | static void batadv_primary_if_select(struct batadv_priv *bat_priv, |
469 | struct batadv_hard_iface *new_hard_iface) | |
c6c8fea2 | 470 | { |
56303d34 | 471 | struct batadv_hard_iface *curr_hard_iface; |
c6c8fea2 | 472 | |
c3caf519 | 473 | ASSERT_RTNL(); |
c6c8fea2 | 474 | |
17a86915 SE |
475 | if (new_hard_iface) |
476 | kref_get(&new_hard_iface->refcount); | |
c6c8fea2 | 477 | |
728cbc6a | 478 | curr_hard_iface = rcu_dereference_protected(bat_priv->primary_if, 1); |
32ae9b22 | 479 | rcu_assign_pointer(bat_priv->primary_if, new_hard_iface); |
c6c8fea2 | 480 | |
32ae9b22 | 481 | if (!new_hard_iface) |
23721387 | 482 | goto out; |
32ae9b22 | 483 | |
29824a55 | 484 | bat_priv->algo_ops->iface.primary_set(new_hard_iface); |
18a1cb6e | 485 | batadv_primary_if_update_addr(bat_priv, curr_hard_iface); |
23721387 SW |
486 | |
487 | out: | |
488 | if (curr_hard_iface) | |
82047ad7 | 489 | batadv_hardif_put(curr_hard_iface); |
c6c8fea2 SE |
490 | } |
491 | ||
56303d34 SE |
492 | static bool |
493 | batadv_hardif_is_iface_up(const struct batadv_hard_iface *hard_iface) | |
c6c8fea2 | 494 | { |
e6c10f43 | 495 | if (hard_iface->net_dev->flags & IFF_UP) |
c6c8fea2 SE |
496 | return true; |
497 | ||
498 | return false; | |
499 | } | |
500 | ||
18a1cb6e | 501 | static void batadv_check_known_mac_addr(const struct net_device *net_dev) |
c6c8fea2 | 502 | { |
56303d34 | 503 | const struct batadv_hard_iface *hard_iface; |
c6c8fea2 SE |
504 | |
505 | rcu_read_lock(); | |
3193e8fd | 506 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e9a4f295 SE |
507 | if ((hard_iface->if_status != BATADV_IF_ACTIVE) && |
508 | (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED)) | |
c6c8fea2 SE |
509 | continue; |
510 | ||
e6c10f43 | 511 | if (hard_iface->net_dev == net_dev) |
c6c8fea2 SE |
512 | continue; |
513 | ||
1eda58bf SE |
514 | if (!batadv_compare_eth(hard_iface->net_dev->dev_addr, |
515 | net_dev->dev_addr)) | |
c6c8fea2 SE |
516 | continue; |
517 | ||
67969581 SE |
518 | pr_warn("The newly added mac address (%pM) already exists on: %s\n", |
519 | net_dev->dev_addr, hard_iface->net_dev->name); | |
520 | pr_warn("It is strongly recommended to keep mac addresses unique to avoid problems!\n"); | |
c6c8fea2 SE |
521 | } |
522 | rcu_read_unlock(); | |
523 | } | |
524 | ||
7bca68c7 SE |
525 | /** |
526 | * batadv_hardif_recalc_extra_skbroom() - Recalculate skbuff extra head/tailroom | |
527 | * @soft_iface: netdev struct of the mesh interface | |
528 | */ | |
529 | static void batadv_hardif_recalc_extra_skbroom(struct net_device *soft_iface) | |
530 | { | |
531 | const struct batadv_hard_iface *hard_iface; | |
532 | unsigned short lower_header_len = ETH_HLEN; | |
533 | unsigned short lower_headroom = 0; | |
534 | unsigned short lower_tailroom = 0; | |
535 | unsigned short needed_headroom; | |
536 | ||
537 | rcu_read_lock(); | |
538 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
539 | if (hard_iface->if_status == BATADV_IF_NOT_IN_USE) | |
540 | continue; | |
541 | ||
542 | if (hard_iface->soft_iface != soft_iface) | |
543 | continue; | |
544 | ||
545 | lower_header_len = max_t(unsigned short, lower_header_len, | |
546 | hard_iface->net_dev->hard_header_len); | |
547 | ||
548 | lower_headroom = max_t(unsigned short, lower_headroom, | |
549 | hard_iface->net_dev->needed_headroom); | |
550 | ||
551 | lower_tailroom = max_t(unsigned short, lower_tailroom, | |
552 | hard_iface->net_dev->needed_tailroom); | |
553 | } | |
554 | rcu_read_unlock(); | |
555 | ||
556 | needed_headroom = lower_headroom + (lower_header_len - ETH_HLEN); | |
557 | needed_headroom += batadv_max_header_len(); | |
558 | ||
559 | soft_iface->needed_headroom = needed_headroom; | |
560 | soft_iface->needed_tailroom = lower_tailroom; | |
561 | } | |
562 | ||
9563877e | 563 | int batadv_hardif_min_mtu(struct net_device *soft_iface) |
c6c8fea2 | 564 | { |
a19d3d85 | 565 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
56303d34 | 566 | const struct batadv_hard_iface *hard_iface; |
930cd6e4 | 567 | int min_mtu = INT_MAX; |
c6c8fea2 SE |
568 | |
569 | rcu_read_lock(); | |
3193e8fd | 570 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e9a4f295 SE |
571 | if ((hard_iface->if_status != BATADV_IF_ACTIVE) && |
572 | (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED)) | |
c6c8fea2 SE |
573 | continue; |
574 | ||
e6c10f43 | 575 | if (hard_iface->soft_iface != soft_iface) |
c6c8fea2 SE |
576 | continue; |
577 | ||
a19d3d85 | 578 | min_mtu = min_t(int, hard_iface->net_dev->mtu, min_mtu); |
c6c8fea2 SE |
579 | } |
580 | rcu_read_unlock(); | |
a19d3d85 | 581 | |
a19d3d85 ML |
582 | if (atomic_read(&bat_priv->fragmentation) == 0) |
583 | goto out; | |
584 | ||
585 | /* with fragmentation enabled the maximum size of internally generated | |
586 | * packets such as translation table exchanges or tvlv containers, etc | |
587 | * has to be calculated | |
588 | */ | |
589 | min_mtu = min_t(int, min_mtu, BATADV_FRAG_MAX_FRAG_SIZE); | |
590 | min_mtu -= sizeof(struct batadv_frag_packet); | |
591 | min_mtu *= BATADV_FRAG_MAX_FRAGMENTS; | |
a19d3d85 | 592 | |
c6c8fea2 | 593 | out: |
930cd6e4 AQ |
594 | /* report to the other components the maximum amount of bytes that |
595 | * batman-adv can send over the wire (without considering the payload | |
596 | * overhead). For example, this value is used by TT to compute the | |
597 | * maximum local table table size | |
598 | */ | |
599 | atomic_set(&bat_priv->packet_size_max, min_mtu); | |
600 | ||
601 | /* the real soft-interface MTU is computed by removing the payload | |
602 | * overhead from the maximum amount of bytes that was just computed. | |
603 | * | |
604 | * However batman-adv does not support MTUs bigger than ETH_DATA_LEN | |
605 | */ | |
606 | return min_t(int, min_mtu - batadv_max_header_len(), ETH_DATA_LEN); | |
c6c8fea2 SE |
607 | } |
608 | ||
609 | /* adjusts the MTU if a new interface with a smaller MTU appeared. */ | |
9563877e | 610 | void batadv_update_min_mtu(struct net_device *soft_iface) |
c6c8fea2 | 611 | { |
a19d3d85 | 612 | soft_iface->mtu = batadv_hardif_min_mtu(soft_iface); |
c6c8fea2 | 613 | |
a19d3d85 ML |
614 | /* Check if the local translate table should be cleaned up to match a |
615 | * new (and smaller) MTU. | |
616 | */ | |
617 | batadv_tt_local_resize_to_mtu(soft_iface); | |
c6c8fea2 SE |
618 | } |
619 | ||
56303d34 SE |
620 | static void |
621 | batadv_hardif_activate_interface(struct batadv_hard_iface *hard_iface) | |
c6c8fea2 | 622 | { |
56303d34 SE |
623 | struct batadv_priv *bat_priv; |
624 | struct batadv_hard_iface *primary_if = NULL; | |
c6c8fea2 | 625 | |
e9a4f295 | 626 | if (hard_iface->if_status != BATADV_IF_INACTIVE) |
32ae9b22 | 627 | goto out; |
c6c8fea2 | 628 | |
e6c10f43 | 629 | bat_priv = netdev_priv(hard_iface->soft_iface); |
c6c8fea2 | 630 | |
29824a55 | 631 | bat_priv->algo_ops->iface.update_mac(hard_iface); |
e9a4f295 | 632 | hard_iface->if_status = BATADV_IF_TO_BE_ACTIVATED; |
c6c8fea2 | 633 | |
9cfc7bd6 | 634 | /* the first active interface becomes our primary interface or |
015758d0 | 635 | * the next active interface after the old primary interface was removed |
c6c8fea2 | 636 | */ |
e5d89254 | 637 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 638 | if (!primary_if) |
18a1cb6e | 639 | batadv_primary_if_select(bat_priv, hard_iface); |
c6c8fea2 | 640 | |
3e34819e SE |
641 | batadv_info(hard_iface->soft_iface, "Interface activated: %s\n", |
642 | hard_iface->net_dev->name); | |
c6c8fea2 | 643 | |
9563877e | 644 | batadv_update_min_mtu(hard_iface->soft_iface); |
32ae9b22 | 645 | |
29824a55 AQ |
646 | if (bat_priv->algo_ops->iface.activate) |
647 | bat_priv->algo_ops->iface.activate(hard_iface); | |
b6cf5d49 | 648 | |
32ae9b22 ML |
649 | out: |
650 | if (primary_if) | |
82047ad7 | 651 | batadv_hardif_put(primary_if); |
c6c8fea2 SE |
652 | } |
653 | ||
56303d34 SE |
654 | static void |
655 | batadv_hardif_deactivate_interface(struct batadv_hard_iface *hard_iface) | |
c6c8fea2 | 656 | { |
e9a4f295 SE |
657 | if ((hard_iface->if_status != BATADV_IF_ACTIVE) && |
658 | (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED)) | |
c6c8fea2 SE |
659 | return; |
660 | ||
e9a4f295 | 661 | hard_iface->if_status = BATADV_IF_INACTIVE; |
c6c8fea2 | 662 | |
3e34819e SE |
663 | batadv_info(hard_iface->soft_iface, "Interface deactivated: %s\n", |
664 | hard_iface->net_dev->name); | |
c6c8fea2 | 665 | |
9563877e | 666 | batadv_update_min_mtu(hard_iface->soft_iface); |
c6c8fea2 SE |
667 | } |
668 | ||
cb4b0d48 AQ |
669 | /** |
670 | * batadv_master_del_slave - remove hard_iface from the current master interface | |
671 | * @slave: the interface enslaved in another master | |
672 | * @master: the master from which slave has to be removed | |
673 | * | |
674 | * Invoke ndo_del_slave on master passing slave as argument. In this way slave | |
675 | * is free'd and master can correctly change its internal state. | |
62fe710f SE |
676 | * |
677 | * Return: 0 on success, a negative value representing the error otherwise | |
cb4b0d48 AQ |
678 | */ |
679 | static int batadv_master_del_slave(struct batadv_hard_iface *slave, | |
680 | struct net_device *master) | |
681 | { | |
682 | int ret; | |
683 | ||
684 | if (!master) | |
685 | return 0; | |
686 | ||
687 | ret = -EBUSY; | |
688 | if (master->netdev_ops->ndo_del_slave) | |
689 | ret = master->netdev_ops->ndo_del_slave(master, slave->net_dev); | |
690 | ||
691 | return ret; | |
692 | } | |
693 | ||
56303d34 | 694 | int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, |
2cd45a06 | 695 | struct net *net, const char *iface_name) |
c6c8fea2 | 696 | { |
56303d34 | 697 | struct batadv_priv *bat_priv; |
cb4b0d48 | 698 | struct net_device *soft_iface, *master; |
293e9338 | 699 | __be16 ethertype = htons(ETH_P_BATMAN); |
411d6ed9 | 700 | int max_header_len = batadv_max_header_len(); |
e44d8fe2 | 701 | int ret; |
c6c8fea2 | 702 | |
e9a4f295 | 703 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
704 | goto out; |
705 | ||
17a86915 | 706 | kref_get(&hard_iface->refcount); |
ed75ccbe | 707 | |
2cd45a06 | 708 | soft_iface = dev_get_by_name(net, iface_name); |
c6c8fea2 | 709 | |
e44d8fe2 | 710 | if (!soft_iface) { |
2cd45a06 | 711 | soft_iface = batadv_softif_create(net, iface_name); |
c6c8fea2 | 712 | |
e44d8fe2 SE |
713 | if (!soft_iface) { |
714 | ret = -ENOMEM; | |
c6c8fea2 | 715 | goto err; |
e44d8fe2 | 716 | } |
c6c8fea2 SE |
717 | |
718 | /* dev_get_by_name() increases the reference counter for us */ | |
e44d8fe2 SE |
719 | dev_hold(soft_iface); |
720 | } | |
721 | ||
04b482a2 | 722 | if (!batadv_softif_is_valid(soft_iface)) { |
86ceb360 | 723 | pr_err("Can't create batman mesh interface %s: already exists as regular interface\n", |
e44d8fe2 | 724 | soft_iface->name); |
e44d8fe2 | 725 | ret = -EINVAL; |
77af7575 | 726 | goto err_dev; |
c6c8fea2 SE |
727 | } |
728 | ||
cb4b0d48 AQ |
729 | /* check if the interface is enslaved in another virtual one and |
730 | * in that case unlink it first | |
731 | */ | |
732 | master = netdev_master_upper_dev_get(hard_iface->net_dev); | |
733 | ret = batadv_master_del_slave(hard_iface, master); | |
734 | if (ret) | |
735 | goto err_dev; | |
736 | ||
e44d8fe2 | 737 | hard_iface->soft_iface = soft_iface; |
e6c10f43 | 738 | bat_priv = netdev_priv(hard_iface->soft_iface); |
d0b9fd89 | 739 | |
6dffb044 | 740 | ret = netdev_master_upper_dev_link(hard_iface->net_dev, |
42ab19ee | 741 | soft_iface, NULL, NULL, NULL); |
3dbd550b SE |
742 | if (ret) |
743 | goto err_dev; | |
744 | ||
29824a55 | 745 | ret = bat_priv->algo_ops->iface.enable(hard_iface); |
5346c35e | 746 | if (ret < 0) |
3dbd550b | 747 | goto err_upper; |
c6c8fea2 | 748 | |
e6c10f43 | 749 | hard_iface->if_num = bat_priv->num_ifaces; |
c6c8fea2 | 750 | bat_priv->num_ifaces++; |
e9a4f295 | 751 | hard_iface->if_status = BATADV_IF_INACTIVE; |
62446307 SW |
752 | ret = batadv_orig_hash_add_if(hard_iface, bat_priv->num_ifaces); |
753 | if (ret < 0) { | |
29824a55 | 754 | bat_priv->algo_ops->iface.disable(hard_iface); |
62446307 SW |
755 | bat_priv->num_ifaces--; |
756 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; | |
3dbd550b | 757 | goto err_upper; |
62446307 | 758 | } |
c6c8fea2 | 759 | |
d7d6de95 | 760 | kref_get(&hard_iface->refcount); |
7e071c79 | 761 | hard_iface->batman_adv_ptype.type = ethertype; |
3193e8fd | 762 | hard_iface->batman_adv_ptype.func = batadv_batman_skb_recv; |
e6c10f43 ML |
763 | hard_iface->batman_adv_ptype.dev = hard_iface->net_dev; |
764 | dev_add_pack(&hard_iface->batman_adv_ptype); | |
c6c8fea2 | 765 | |
3e34819e SE |
766 | batadv_info(hard_iface->soft_iface, "Adding interface: %s\n", |
767 | hard_iface->net_dev->name); | |
c6c8fea2 | 768 | |
0aca2369 | 769 | if (atomic_read(&bat_priv->fragmentation) && |
411d6ed9 | 770 | hard_iface->net_dev->mtu < ETH_DATA_LEN + max_header_len) |
3e34819e | 771 | batadv_info(hard_iface->soft_iface, |
411d6ed9 | 772 | "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 | 773 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
411d6ed9 | 774 | ETH_DATA_LEN + max_header_len); |
c6c8fea2 | 775 | |
0aca2369 | 776 | if (!atomic_read(&bat_priv->fragmentation) && |
411d6ed9 | 777 | hard_iface->net_dev->mtu < ETH_DATA_LEN + max_header_len) |
3e34819e | 778 | batadv_info(hard_iface->soft_iface, |
411d6ed9 | 779 | "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 | 780 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
411d6ed9 | 781 | ETH_DATA_LEN + max_header_len); |
c6c8fea2 | 782 | |
18a1cb6e SE |
783 | if (batadv_hardif_is_iface_up(hard_iface)) |
784 | batadv_hardif_activate_interface(hard_iface); | |
c6c8fea2 | 785 | else |
3e34819e SE |
786 | batadv_err(hard_iface->soft_iface, |
787 | "Not using interface %s (retrying later): interface not active\n", | |
788 | hard_iface->net_dev->name); | |
c6c8fea2 | 789 | |
7bca68c7 SE |
790 | batadv_hardif_recalc_extra_skbroom(soft_iface); |
791 | ||
c6c8fea2 SE |
792 | out: |
793 | return 0; | |
794 | ||
3dbd550b SE |
795 | err_upper: |
796 | netdev_upper_dev_unlink(hard_iface->net_dev, soft_iface); | |
77af7575 | 797 | err_dev: |
3dbd550b | 798 | hard_iface->soft_iface = NULL; |
77af7575 | 799 | dev_put(soft_iface); |
c6c8fea2 | 800 | err: |
82047ad7 | 801 | batadv_hardif_put(hard_iface); |
e44d8fe2 | 802 | return ret; |
c6c8fea2 SE |
803 | } |
804 | ||
a15fd361 SE |
805 | void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface, |
806 | enum batadv_hard_if_cleanup autodel) | |
c6c8fea2 | 807 | { |
56303d34 SE |
808 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
809 | struct batadv_hard_iface *primary_if = NULL; | |
c6c8fea2 | 810 | |
f2d23861 | 811 | batadv_hardif_deactivate_interface(hard_iface); |
c6c8fea2 | 812 | |
e9a4f295 | 813 | if (hard_iface->if_status != BATADV_IF_INACTIVE) |
32ae9b22 | 814 | goto out; |
c6c8fea2 | 815 | |
3e34819e SE |
816 | batadv_info(hard_iface->soft_iface, "Removing interface: %s\n", |
817 | hard_iface->net_dev->name); | |
e6c10f43 | 818 | dev_remove_pack(&hard_iface->batman_adv_ptype); |
d7d6de95 | 819 | batadv_hardif_put(hard_iface); |
c6c8fea2 SE |
820 | |
821 | bat_priv->num_ifaces--; | |
7d211efc | 822 | batadv_orig_hash_del_if(hard_iface, bat_priv->num_ifaces); |
c6c8fea2 | 823 | |
e5d89254 | 824 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 825 | if (hard_iface == primary_if) { |
56303d34 | 826 | struct batadv_hard_iface *new_if; |
c6c8fea2 | 827 | |
18a1cb6e SE |
828 | new_if = batadv_hardif_get_active(hard_iface->soft_iface); |
829 | batadv_primary_if_select(bat_priv, new_if); | |
c6c8fea2 SE |
830 | |
831 | if (new_if) | |
82047ad7 | 832 | batadv_hardif_put(new_if); |
c6c8fea2 SE |
833 | } |
834 | ||
29824a55 | 835 | bat_priv->algo_ops->iface.disable(hard_iface); |
e9a4f295 | 836 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; |
c6c8fea2 | 837 | |
e6c10f43 | 838 | /* delete all references to this hard_iface */ |
7d211efc | 839 | batadv_purge_orig_ref(bat_priv); |
9455e34c | 840 | batadv_purge_outstanding_packets(bat_priv, hard_iface); |
e6c10f43 | 841 | dev_put(hard_iface->soft_iface); |
c6c8fea2 | 842 | |
a5256f7e | 843 | netdev_upper_dev_unlink(hard_iface->net_dev, hard_iface->soft_iface); |
7bca68c7 | 844 | batadv_hardif_recalc_extra_skbroom(hard_iface->soft_iface); |
a5256f7e | 845 | |
c6c8fea2 | 846 | /* nobody uses this interface anymore */ |
8257f55a AQ |
847 | if (!bat_priv->num_ifaces) { |
848 | batadv_gw_check_client_stop(bat_priv); | |
849 | ||
850 | if (autodel == BATADV_IF_CLEANUP_AUTO) | |
851 | batadv_softif_destroy_sysfs(hard_iface->soft_iface); | |
852 | } | |
c6c8fea2 | 853 | |
27915aa6 | 854 | hard_iface->soft_iface = NULL; |
82047ad7 | 855 | batadv_hardif_put(hard_iface); |
32ae9b22 ML |
856 | |
857 | out: | |
858 | if (primary_if) | |
82047ad7 | 859 | batadv_hardif_put(primary_if); |
c6c8fea2 SE |
860 | } |
861 | ||
56303d34 | 862 | static struct batadv_hard_iface * |
18a1cb6e | 863 | batadv_hardif_add_interface(struct net_device *net_dev) |
c6c8fea2 | 864 | { |
56303d34 | 865 | struct batadv_hard_iface *hard_iface; |
c6c8fea2 SE |
866 | int ret; |
867 | ||
c3caf519 SE |
868 | ASSERT_RTNL(); |
869 | ||
4b426b10 | 870 | if (!batadv_is_valid_iface(net_dev)) |
c6c8fea2 SE |
871 | goto out; |
872 | ||
873 | dev_hold(net_dev); | |
874 | ||
7db3fc29 | 875 | hard_iface = kzalloc(sizeof(*hard_iface), GFP_ATOMIC); |
320f422f | 876 | if (!hard_iface) |
c6c8fea2 | 877 | goto release_dev; |
c6c8fea2 | 878 | |
5853e22c | 879 | ret = batadv_sysfs_add_hardif(&hard_iface->hardif_obj, net_dev); |
c6c8fea2 SE |
880 | if (ret) |
881 | goto free_if; | |
882 | ||
e6c10f43 ML |
883 | hard_iface->if_num = -1; |
884 | hard_iface->net_dev = net_dev; | |
885 | hard_iface->soft_iface = NULL; | |
e9a4f295 | 886 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; |
5bc7c1eb SW |
887 | |
888 | ret = batadv_debugfs_add_hardif(hard_iface); | |
889 | if (ret) | |
890 | goto free_sysfs; | |
891 | ||
e6c10f43 | 892 | INIT_LIST_HEAD(&hard_iface->list); |
cef63419 | 893 | INIT_HLIST_HEAD(&hard_iface->neigh_list); |
5bc44dc8 | 894 | |
cef63419 | 895 | spin_lock_init(&hard_iface->neigh_list_lock); |
b2367e46 | 896 | kref_init(&hard_iface->refcount); |
cef63419 | 897 | |
caf65bfc | 898 | hard_iface->num_bcasts = BATADV_NUM_BCASTS_DEFAULT; |
10b1bbb4 SE |
899 | hard_iface->wifi_flags = batadv_wifi_flags_evaluate(net_dev); |
900 | if (batadv_is_wifi_hardif(hard_iface)) | |
caf65bfc MS |
901 | hard_iface->num_bcasts = BATADV_NUM_BCASTS_WIRELESS; |
902 | ||
7db682d1 ML |
903 | batadv_v_hardif_init(hard_iface); |
904 | ||
18a1cb6e | 905 | batadv_check_known_mac_addr(hard_iface->net_dev); |
b2367e46 | 906 | kref_get(&hard_iface->refcount); |
3193e8fd | 907 | list_add_tail_rcu(&hard_iface->list, &batadv_hardif_list); |
c6c8fea2 | 908 | |
e6c10f43 | 909 | return hard_iface; |
c6c8fea2 | 910 | |
5bc7c1eb SW |
911 | free_sysfs: |
912 | batadv_sysfs_del_hardif(&hard_iface->hardif_obj); | |
c6c8fea2 | 913 | free_if: |
e6c10f43 | 914 | kfree(hard_iface); |
c6c8fea2 SE |
915 | release_dev: |
916 | dev_put(net_dev); | |
917 | out: | |
918 | return NULL; | |
919 | } | |
920 | ||
56303d34 | 921 | static void batadv_hardif_remove_interface(struct batadv_hard_iface *hard_iface) |
c6c8fea2 | 922 | { |
c3caf519 SE |
923 | ASSERT_RTNL(); |
924 | ||
c6c8fea2 | 925 | /* first deactivate interface */ |
e9a4f295 | 926 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
a15fd361 | 927 | batadv_hardif_disable_interface(hard_iface, |
06d640c9 | 928 | BATADV_IF_CLEANUP_KEEP); |
c6c8fea2 | 929 | |
e9a4f295 | 930 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
931 | return; |
932 | ||
e9a4f295 | 933 | hard_iface->if_status = BATADV_IF_TO_BE_REMOVED; |
569c9850 SE |
934 | batadv_debugfs_del_hardif(hard_iface); |
935 | batadv_sysfs_del_hardif(&hard_iface->hardif_obj); | |
936 | batadv_hardif_put(hard_iface); | |
c6c8fea2 SE |
937 | } |
938 | ||
9563877e | 939 | void batadv_hardif_remove_interfaces(void) |
c6c8fea2 | 940 | { |
56303d34 | 941 | struct batadv_hard_iface *hard_iface, *hard_iface_tmp; |
c6c8fea2 | 942 | |
c3caf519 | 943 | rtnl_lock(); |
e6c10f43 | 944 | list_for_each_entry_safe(hard_iface, hard_iface_tmp, |
3193e8fd | 945 | &batadv_hardif_list, list) { |
e6c10f43 | 946 | list_del_rcu(&hard_iface->list); |
18a1cb6e | 947 | batadv_hardif_remove_interface(hard_iface); |
c6c8fea2 SE |
948 | } |
949 | rtnl_unlock(); | |
950 | } | |
951 | ||
18a1cb6e SE |
952 | static int batadv_hard_if_event(struct notifier_block *this, |
953 | unsigned long event, void *ptr) | |
c6c8fea2 | 954 | { |
351638e7 | 955 | struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); |
56303d34 SE |
956 | struct batadv_hard_iface *hard_iface; |
957 | struct batadv_hard_iface *primary_if = NULL; | |
958 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 959 | |
37130293 SE |
960 | if (batadv_softif_is_valid(net_dev) && event == NETDEV_REGISTER) { |
961 | batadv_sysfs_add_meshif(net_dev); | |
5d2c05b2 AQ |
962 | bat_priv = netdev_priv(net_dev); |
963 | batadv_softif_create_vlan(bat_priv, BATADV_NO_FLAGS); | |
37130293 SE |
964 | return NOTIFY_DONE; |
965 | } | |
966 | ||
56303d34 | 967 | hard_iface = batadv_hardif_get_by_netdev(net_dev); |
a1a66b11 AL |
968 | if (!hard_iface && (event == NETDEV_REGISTER || |
969 | event == NETDEV_POST_TYPE_CHANGE)) | |
18a1cb6e | 970 | hard_iface = batadv_hardif_add_interface(net_dev); |
c6c8fea2 | 971 | |
e6c10f43 | 972 | if (!hard_iface) |
c6c8fea2 SE |
973 | goto out; |
974 | ||
975 | switch (event) { | |
976 | case NETDEV_UP: | |
18a1cb6e | 977 | batadv_hardif_activate_interface(hard_iface); |
c6c8fea2 SE |
978 | break; |
979 | case NETDEV_GOING_DOWN: | |
980 | case NETDEV_DOWN: | |
18a1cb6e | 981 | batadv_hardif_deactivate_interface(hard_iface); |
c6c8fea2 SE |
982 | break; |
983 | case NETDEV_UNREGISTER: | |
a1a66b11 | 984 | case NETDEV_PRE_TYPE_CHANGE: |
e6c10f43 | 985 | list_del_rcu(&hard_iface->list); |
c6c8fea2 | 986 | |
18a1cb6e | 987 | batadv_hardif_remove_interface(hard_iface); |
c6c8fea2 SE |
988 | break; |
989 | case NETDEV_CHANGEMTU: | |
e6c10f43 | 990 | if (hard_iface->soft_iface) |
9563877e | 991 | batadv_update_min_mtu(hard_iface->soft_iface); |
c6c8fea2 SE |
992 | break; |
993 | case NETDEV_CHANGEADDR: | |
e9a4f295 | 994 | if (hard_iface->if_status == BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
995 | goto hardif_put; |
996 | ||
18a1cb6e | 997 | batadv_check_known_mac_addr(hard_iface->net_dev); |
c6c8fea2 | 998 | |
e6c10f43 | 999 | bat_priv = netdev_priv(hard_iface->soft_iface); |
29824a55 | 1000 | bat_priv->algo_ops->iface.update_mac(hard_iface); |
01c4224b | 1001 | |
e5d89254 | 1002 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 ML |
1003 | if (!primary_if) |
1004 | goto hardif_put; | |
1005 | ||
1006 | if (hard_iface == primary_if) | |
18a1cb6e | 1007 | batadv_primary_if_update_addr(bat_priv, NULL); |
c6c8fea2 | 1008 | break; |
ee3b5e9f SE |
1009 | case NETDEV_CHANGEUPPER: |
1010 | hard_iface->wifi_flags = batadv_wifi_flags_evaluate(net_dev); | |
1011 | if (batadv_is_wifi_hardif(hard_iface)) | |
1012 | hard_iface->num_bcasts = BATADV_NUM_BCASTS_WIRELESS; | |
1013 | break; | |
c6c8fea2 SE |
1014 | default: |
1015 | break; | |
f81c6224 | 1016 | } |
c6c8fea2 SE |
1017 | |
1018 | hardif_put: | |
82047ad7 | 1019 | batadv_hardif_put(hard_iface); |
c6c8fea2 | 1020 | out: |
32ae9b22 | 1021 | if (primary_if) |
82047ad7 | 1022 | batadv_hardif_put(primary_if); |
c6c8fea2 SE |
1023 | return NOTIFY_DONE; |
1024 | } | |
1025 | ||
9563877e | 1026 | struct notifier_block batadv_hard_if_notifier = { |
18a1cb6e | 1027 | .notifier_call = batadv_hard_if_event, |
c6c8fea2 | 1028 | }; |