Commit | Line | Data |
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7db7d9f3 | 1 | // SPDX-License-Identifier: GPL-2.0 |
7a79d717 | 2 | /* Copyright (C) 2007-2019 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
3 | * |
4 | * Marek Lindner, Simon Wunderlich | |
c6c8fea2 SE |
5 | */ |
6 | ||
c6c8fea2 | 7 | #include "hard-interface.h" |
1e2c2a4f | 8 | #include "main.h" |
c6c8fea2 | 9 | |
7a659d56 | 10 | #include <linux/atomic.h> |
1e2c2a4f SE |
11 | #include <linux/byteorder/generic.h> |
12 | #include <linux/errno.h> | |
b92b94ac | 13 | #include <linux/gfp.h> |
fcafa5e7 | 14 | #include <linux/if.h> |
c6c8fea2 | 15 | #include <linux/if_arp.h> |
af5d4f77 | 16 | #include <linux/if_ether.h> |
1e2c2a4f | 17 | #include <linux/kernel.h> |
7a659d56 | 18 | #include <linux/kref.h> |
e1928752 | 19 | #include <linux/limits.h> |
1e2c2a4f SE |
20 | #include <linux/list.h> |
21 | #include <linux/netdevice.h> | |
22 | #include <linux/printk.h> | |
23 | #include <linux/rculist.h> | |
24 | #include <linux/rtnetlink.h> | |
25 | #include <linux/slab.h> | |
cef63419 | 26 | #include <linux/spinlock.h> |
275019d2 AL |
27 | #include <net/net_namespace.h> |
28 | #include <net/rtnetlink.h> | |
fec149f5 | 29 | #include <uapi/linux/batadv_packet.h> |
1e2c2a4f | 30 | |
a2d08166 | 31 | #include "bat_v.h" |
1e2c2a4f SE |
32 | #include "bridge_loop_avoidance.h" |
33 | #include "debugfs.h" | |
34 | #include "distributed-arp-table.h" | |
35 | #include "gateway_client.h" | |
ba412080 | 36 | #include "log.h" |
1e2c2a4f | 37 | #include "originator.h" |
1e2c2a4f SE |
38 | #include "send.h" |
39 | #include "soft-interface.h" | |
40 | #include "sysfs.h" | |
41 | #include "translation-table.h" | |
c6c8fea2 | 42 | |
140ed8e8 | 43 | /** |
7e9a8c2c | 44 | * batadv_hardif_release() - release hard interface from lists and queue for |
140ed8e8 | 45 | * free after rcu grace period |
7a659d56 | 46 | * @ref: kref pointer of the hard interface |
140ed8e8 | 47 | */ |
7a659d56 | 48 | void batadv_hardif_release(struct kref *ref) |
c6c8fea2 | 49 | { |
7a659d56 SE |
50 | struct batadv_hard_iface *hard_iface; |
51 | ||
52 | hard_iface = container_of(ref, struct batadv_hard_iface, refcount); | |
e6c10f43 | 53 | dev_put(hard_iface->net_dev); |
140ed8e8 SE |
54 | |
55 | kfree_rcu(hard_iface, rcu); | |
c6c8fea2 SE |
56 | } |
57 | ||
ff15c27c SE |
58 | /** |
59 | * batadv_hardif_get_by_netdev() - Get hard interface object of a net_device | |
60 | * @net_dev: net_device to search for | |
61 | * | |
62 | * Return: batadv_hard_iface of net_dev (with increased refcnt), NULL on errors | |
63 | */ | |
56303d34 SE |
64 | struct batadv_hard_iface * |
65 | batadv_hardif_get_by_netdev(const struct net_device *net_dev) | |
c6c8fea2 | 66 | { |
56303d34 | 67 | struct batadv_hard_iface *hard_iface; |
c6c8fea2 SE |
68 | |
69 | rcu_read_lock(); | |
3193e8fd | 70 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e6c10f43 | 71 | if (hard_iface->net_dev == net_dev && |
7a659d56 | 72 | kref_get_unless_zero(&hard_iface->refcount)) |
c6c8fea2 SE |
73 | goto out; |
74 | } | |
75 | ||
e6c10f43 | 76 | hard_iface = NULL; |
c6c8fea2 SE |
77 | |
78 | out: | |
c6c8fea2 | 79 | rcu_read_unlock(); |
e6c10f43 | 80 | return hard_iface; |
c6c8fea2 SE |
81 | } |
82 | ||
275019d2 | 83 | /** |
7e9a8c2c | 84 | * batadv_getlink_net() - return link net namespace (of use fallback) |
275019d2 AL |
85 | * @netdev: net_device to check |
86 | * @fallback_net: return in case get_link_net is not available for @netdev | |
87 | * | |
88 | * Return: result of rtnl_link_ops->get_link_net or @fallback_net | |
89 | */ | |
88ffc7d0 SE |
90 | static struct net *batadv_getlink_net(const struct net_device *netdev, |
91 | struct net *fallback_net) | |
275019d2 AL |
92 | { |
93 | if (!netdev->rtnl_link_ops) | |
94 | return fallback_net; | |
95 | ||
96 | if (!netdev->rtnl_link_ops->get_link_net) | |
97 | return fallback_net; | |
98 | ||
99 | return netdev->rtnl_link_ops->get_link_net(netdev); | |
100 | } | |
101 | ||
1bc4e2b0 | 102 | /** |
7e9a8c2c | 103 | * batadv_mutual_parents() - check if two devices are each others parent |
275019d2 AL |
104 | * @dev1: 1st net dev |
105 | * @net1: 1st devices netns | |
106 | * @dev2: 2nd net dev | |
107 | * @net2: 2nd devices netns | |
1bc4e2b0 AL |
108 | * |
109 | * veth devices come in pairs and each is the parent of the other! | |
110 | * | |
111 | * Return: true if the devices are each others parent, otherwise false | |
112 | */ | |
113 | static bool batadv_mutual_parents(const struct net_device *dev1, | |
88ffc7d0 | 114 | struct net *net1, |
275019d2 | 115 | const struct net_device *dev2, |
88ffc7d0 | 116 | struct net *net2) |
1bc4e2b0 AL |
117 | { |
118 | int dev1_parent_iflink = dev_get_iflink(dev1); | |
119 | int dev2_parent_iflink = dev_get_iflink(dev2); | |
275019d2 AL |
120 | const struct net *dev1_parent_net; |
121 | const struct net *dev2_parent_net; | |
122 | ||
123 | dev1_parent_net = batadv_getlink_net(dev1, net1); | |
124 | dev2_parent_net = batadv_getlink_net(dev2, net2); | |
1bc4e2b0 AL |
125 | |
126 | if (!dev1_parent_iflink || !dev2_parent_iflink) | |
127 | return false; | |
128 | ||
129 | return (dev1_parent_iflink == dev2->ifindex) && | |
275019d2 AL |
130 | (dev2_parent_iflink == dev1->ifindex) && |
131 | net_eq(dev1_parent_net, net2) && | |
132 | net_eq(dev2_parent_net, net1); | |
1bc4e2b0 AL |
133 | } |
134 | ||
b7eddd0b | 135 | /** |
7e9a8c2c | 136 | * batadv_is_on_batman_iface() - check if a device is a batman iface descendant |
b7eddd0b AQ |
137 | * @net_dev: the device to check |
138 | * | |
139 | * If the user creates any virtual device on top of a batman-adv interface, it | |
140 | * is important to prevent this new interface to be used to create a new mesh | |
141 | * network (this behaviour would lead to a batman-over-batman configuration). | |
142 | * This function recursively checks all the fathers of the device passed as | |
143 | * argument looking for a batman-adv soft interface. | |
144 | * | |
62fe710f | 145 | * Return: true if the device is descendant of a batman-adv mesh interface (or |
b7eddd0b AQ |
146 | * if it is a batman-adv interface itself), false otherwise |
147 | */ | |
148 | static bool batadv_is_on_batman_iface(const struct net_device *net_dev) | |
149 | { | |
2cd45a06 | 150 | struct net *net = dev_net(net_dev); |
275019d2 | 151 | struct net_device *parent_dev; |
88ffc7d0 | 152 | struct net *parent_net; |
b7eddd0b AQ |
153 | bool ret; |
154 | ||
155 | /* check if this is a batman-adv mesh interface */ | |
156 | if (batadv_softif_is_valid(net_dev)) | |
157 | return true; | |
158 | ||
159 | /* no more parents..stop recursion */ | |
a54acb3a ND |
160 | if (dev_get_iflink(net_dev) == 0 || |
161 | dev_get_iflink(net_dev) == net_dev->ifindex) | |
b7eddd0b AQ |
162 | return false; |
163 | ||
275019d2 AL |
164 | parent_net = batadv_getlink_net(net_dev, net); |
165 | ||
b7eddd0b | 166 | /* recurse over the parent device */ |
275019d2 AL |
167 | parent_dev = __dev_get_by_index((struct net *)parent_net, |
168 | dev_get_iflink(net_dev)); | |
b7eddd0b | 169 | /* if we got a NULL parent_dev there is something broken.. */ |
955d3411 SE |
170 | if (!parent_dev) { |
171 | pr_err("Cannot find parent device\n"); | |
b7eddd0b | 172 | return false; |
955d3411 | 173 | } |
b7eddd0b | 174 | |
275019d2 | 175 | if (batadv_mutual_parents(net_dev, net, parent_dev, parent_net)) |
1bc4e2b0 AL |
176 | return false; |
177 | ||
b7eddd0b AQ |
178 | ret = batadv_is_on_batman_iface(parent_dev); |
179 | ||
b7eddd0b AQ |
180 | return ret; |
181 | } | |
182 | ||
4b426b10 | 183 | static bool batadv_is_valid_iface(const struct net_device *net_dev) |
c6c8fea2 SE |
184 | { |
185 | if (net_dev->flags & IFF_LOOPBACK) | |
4b426b10 | 186 | return false; |
c6c8fea2 SE |
187 | |
188 | if (net_dev->type != ARPHRD_ETHER) | |
4b426b10 | 189 | return false; |
c6c8fea2 SE |
190 | |
191 | if (net_dev->addr_len != ETH_ALEN) | |
4b426b10 | 192 | return false; |
c6c8fea2 SE |
193 | |
194 | /* no batman over batman */ | |
b7eddd0b | 195 | if (batadv_is_on_batman_iface(net_dev)) |
4b426b10 | 196 | return false; |
c6c8fea2 | 197 | |
4b426b10 | 198 | return true; |
c6c8fea2 SE |
199 | } |
200 | ||
de68d100 | 201 | /** |
7e9a8c2c | 202 | * batadv_get_real_netdevice() - check if the given netdev struct is a virtual |
5ed4a460 ML |
203 | * interface on top of another 'real' interface |
204 | * @netdev: the device to check | |
205 | * | |
1942de1b ML |
206 | * Callers must hold the rtnl semaphore. You may want batadv_get_real_netdev() |
207 | * instead of this. | |
208 | * | |
5ed4a460 ML |
209 | * Return: the 'real' net device or the original net device and NULL in case |
210 | * of an error. | |
211 | */ | |
212 | static struct net_device *batadv_get_real_netdevice(struct net_device *netdev) | |
213 | { | |
214 | struct batadv_hard_iface *hard_iface = NULL; | |
215 | struct net_device *real_netdev = NULL; | |
216 | struct net *real_net; | |
217 | struct net *net; | |
218 | int ifindex; | |
219 | ||
220 | ASSERT_RTNL(); | |
221 | ||
222 | if (!netdev) | |
223 | return NULL; | |
224 | ||
225 | if (netdev->ifindex == dev_get_iflink(netdev)) { | |
226 | dev_hold(netdev); | |
227 | return netdev; | |
228 | } | |
229 | ||
230 | hard_iface = batadv_hardif_get_by_netdev(netdev); | |
231 | if (!hard_iface || !hard_iface->soft_iface) | |
232 | goto out; | |
233 | ||
234 | net = dev_net(hard_iface->soft_iface); | |
235 | ifindex = dev_get_iflink(netdev); | |
236 | real_net = batadv_getlink_net(netdev, net); | |
237 | real_netdev = dev_get_by_index(real_net, ifindex); | |
238 | ||
239 | out: | |
240 | if (hard_iface) | |
241 | batadv_hardif_put(hard_iface); | |
242 | return real_netdev; | |
243 | } | |
244 | ||
1942de1b | 245 | /** |
7e9a8c2c | 246 | * batadv_get_real_netdev() - check if the given net_device struct is a virtual |
1942de1b | 247 | * interface on top of another 'real' interface |
de68d100 MS |
248 | * @net_device: the device to check |
249 | * | |
1942de1b ML |
250 | * Return: the 'real' net device or the original net device and NULL in case |
251 | * of an error. | |
de68d100 | 252 | */ |
1942de1b ML |
253 | struct net_device *batadv_get_real_netdev(struct net_device *net_device) |
254 | { | |
255 | struct net_device *real_netdev; | |
256 | ||
257 | rtnl_lock(); | |
258 | real_netdev = batadv_get_real_netdevice(net_device); | |
259 | rtnl_unlock(); | |
260 | ||
261 | return real_netdev; | |
262 | } | |
263 | ||
10b1bbb4 | 264 | /** |
7e9a8c2c | 265 | * batadv_is_wext_netdev() - check if the given net_device struct is a |
10b1bbb4 SE |
266 | * wext wifi interface |
267 | * @net_device: the device to check | |
268 | * | |
269 | * Return: true if the net device is a wext wireless device, false | |
270 | * otherwise. | |
271 | */ | |
272 | static bool batadv_is_wext_netdev(struct net_device *net_device) | |
de68d100 | 273 | { |
0c69aecc AQ |
274 | if (!net_device) |
275 | return false; | |
276 | ||
de68d100 MS |
277 | #ifdef CONFIG_WIRELESS_EXT |
278 | /* pre-cfg80211 drivers have to implement WEXT, so it is possible to | |
279 | * check for wireless_handlers != NULL | |
280 | */ | |
281 | if (net_device->wireless_handlers) | |
282 | return true; | |
283 | #endif | |
284 | ||
10b1bbb4 SE |
285 | return false; |
286 | } | |
287 | ||
f44a3ae9 | 288 | /** |
7e9a8c2c | 289 | * batadv_is_cfg80211_netdev() - check if the given net_device struct is a |
f44a3ae9 ML |
290 | * cfg80211 wifi interface |
291 | * @net_device: the device to check | |
292 | * | |
293 | * Return: true if the net device is a cfg80211 wireless device, false | |
294 | * otherwise. | |
295 | */ | |
10b1bbb4 | 296 | static bool batadv_is_cfg80211_netdev(struct net_device *net_device) |
f44a3ae9 ML |
297 | { |
298 | if (!net_device) | |
299 | return false; | |
300 | ||
de68d100 MS |
301 | /* cfg80211 drivers have to set ieee80211_ptr */ |
302 | if (net_device->ieee80211_ptr) | |
303 | return true; | |
304 | ||
305 | return false; | |
306 | } | |
307 | ||
de68d100 | 308 | /** |
7e9a8c2c | 309 | * batadv_wifi_flags_evaluate() - calculate wifi flags for net_device |
de68d100 MS |
310 | * @net_device: the device to check |
311 | * | |
10b1bbb4 SE |
312 | * Return: batadv_hard_iface_wifi_flags flags of the device |
313 | */ | |
314 | static u32 batadv_wifi_flags_evaluate(struct net_device *net_device) | |
315 | { | |
316 | u32 wifi_flags = 0; | |
5ed4a460 | 317 | struct net_device *real_netdev; |
10b1bbb4 SE |
318 | |
319 | if (batadv_is_wext_netdev(net_device)) | |
320 | wifi_flags |= BATADV_HARDIF_WIFI_WEXT_DIRECT; | |
321 | ||
322 | if (batadv_is_cfg80211_netdev(net_device)) | |
323 | wifi_flags |= BATADV_HARDIF_WIFI_CFG80211_DIRECT; | |
324 | ||
5ed4a460 ML |
325 | real_netdev = batadv_get_real_netdevice(net_device); |
326 | if (!real_netdev) | |
327 | return wifi_flags; | |
328 | ||
329 | if (real_netdev == net_device) | |
330 | goto out; | |
331 | ||
332 | if (batadv_is_wext_netdev(real_netdev)) | |
333 | wifi_flags |= BATADV_HARDIF_WIFI_WEXT_INDIRECT; | |
334 | ||
335 | if (batadv_is_cfg80211_netdev(real_netdev)) | |
336 | wifi_flags |= BATADV_HARDIF_WIFI_CFG80211_INDIRECT; | |
337 | ||
338 | out: | |
339 | dev_put(real_netdev); | |
10b1bbb4 SE |
340 | return wifi_flags; |
341 | } | |
342 | ||
343 | /** | |
7e9a8c2c | 344 | * batadv_is_cfg80211_hardif() - check if the given hardif is a cfg80211 wifi |
10b1bbb4 SE |
345 | * interface |
346 | * @hard_iface: the device to check | |
347 | * | |
348 | * Return: true if the net device is a cfg80211 wireless device, false | |
349 | * otherwise. | |
350 | */ | |
351 | bool batadv_is_cfg80211_hardif(struct batadv_hard_iface *hard_iface) | |
352 | { | |
353 | u32 allowed_flags = 0; | |
354 | ||
355 | allowed_flags |= BATADV_HARDIF_WIFI_CFG80211_DIRECT; | |
5ed4a460 | 356 | allowed_flags |= BATADV_HARDIF_WIFI_CFG80211_INDIRECT; |
10b1bbb4 SE |
357 | |
358 | return !!(hard_iface->wifi_flags & allowed_flags); | |
359 | } | |
360 | ||
361 | /** | |
7e9a8c2c | 362 | * batadv_is_wifi_hardif() - check if the given hardif is a wifi interface |
10b1bbb4 SE |
363 | * @hard_iface: the device to check |
364 | * | |
62fe710f | 365 | * Return: true if the net device is a 802.11 wireless device, false otherwise. |
de68d100 | 366 | */ |
10b1bbb4 | 367 | bool batadv_is_wifi_hardif(struct batadv_hard_iface *hard_iface) |
de68d100 | 368 | { |
10b1bbb4 | 369 | if (!hard_iface) |
0c69aecc AQ |
370 | return false; |
371 | ||
10b1bbb4 | 372 | return hard_iface->wifi_flags != 0; |
de68d100 MS |
373 | } |
374 | ||
3111beed | 375 | /** |
7e9a8c2c | 376 | * batadv_hardif_no_broadcast() - check whether (re)broadcast is necessary |
3111beed LL |
377 | * @if_outgoing: the outgoing interface checked and considered for (re)broadcast |
378 | * @orig_addr: the originator of this packet | |
379 | * @orig_neigh: originator address of the forwarder we just got the packet from | |
380 | * (NULL if we originated) | |
381 | * | |
382 | * Checks whether a packet needs to be (re)broadcasted on the given interface. | |
383 | * | |
384 | * Return: | |
385 | * BATADV_HARDIF_BCAST_NORECIPIENT: No neighbor on interface | |
386 | * BATADV_HARDIF_BCAST_DUPFWD: Just one neighbor, but it is the forwarder | |
387 | * BATADV_HARDIF_BCAST_DUPORIG: Just one neighbor, but it is the originator | |
388 | * BATADV_HARDIF_BCAST_OK: Several neighbors, must broadcast | |
389 | */ | |
390 | int batadv_hardif_no_broadcast(struct batadv_hard_iface *if_outgoing, | |
391 | u8 *orig_addr, u8 *orig_neigh) | |
392 | { | |
393 | struct batadv_hardif_neigh_node *hardif_neigh; | |
394 | struct hlist_node *first; | |
395 | int ret = BATADV_HARDIF_BCAST_OK; | |
396 | ||
397 | rcu_read_lock(); | |
398 | ||
399 | /* 0 neighbors -> no (re)broadcast */ | |
400 | first = rcu_dereference(hlist_first_rcu(&if_outgoing->neigh_list)); | |
401 | if (!first) { | |
402 | ret = BATADV_HARDIF_BCAST_NORECIPIENT; | |
403 | goto out; | |
404 | } | |
405 | ||
406 | /* >1 neighbors -> (re)brodcast */ | |
407 | if (rcu_dereference(hlist_next_rcu(first))) | |
408 | goto out; | |
409 | ||
410 | hardif_neigh = hlist_entry(first, struct batadv_hardif_neigh_node, | |
411 | list); | |
412 | ||
413 | /* 1 neighbor, is the originator -> no rebroadcast */ | |
414 | if (orig_addr && batadv_compare_eth(hardif_neigh->orig, orig_addr)) { | |
415 | ret = BATADV_HARDIF_BCAST_DUPORIG; | |
416 | /* 1 neighbor, is the one we received from -> no rebroadcast */ | |
417 | } else if (orig_neigh && | |
418 | batadv_compare_eth(hardif_neigh->orig, orig_neigh)) { | |
419 | ret = BATADV_HARDIF_BCAST_DUPFWD; | |
420 | } | |
421 | ||
422 | out: | |
423 | rcu_read_unlock(); | |
424 | return ret; | |
425 | } | |
426 | ||
56303d34 | 427 | static struct batadv_hard_iface * |
18a1cb6e | 428 | batadv_hardif_get_active(const struct net_device *soft_iface) |
c6c8fea2 | 429 | { |
56303d34 | 430 | struct batadv_hard_iface *hard_iface; |
c6c8fea2 SE |
431 | |
432 | rcu_read_lock(); | |
3193e8fd | 433 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e6c10f43 | 434 | if (hard_iface->soft_iface != soft_iface) |
c6c8fea2 SE |
435 | continue; |
436 | ||
e9a4f295 | 437 | if (hard_iface->if_status == BATADV_IF_ACTIVE && |
7a659d56 | 438 | kref_get_unless_zero(&hard_iface->refcount)) |
c6c8fea2 SE |
439 | goto out; |
440 | } | |
441 | ||
e6c10f43 | 442 | hard_iface = NULL; |
c6c8fea2 SE |
443 | |
444 | out: | |
c6c8fea2 | 445 | rcu_read_unlock(); |
e6c10f43 | 446 | return hard_iface; |
c6c8fea2 SE |
447 | } |
448 | ||
56303d34 SE |
449 | static void batadv_primary_if_update_addr(struct batadv_priv *bat_priv, |
450 | struct batadv_hard_iface *oldif) | |
c6c8fea2 | 451 | { |
56303d34 | 452 | struct batadv_hard_iface *primary_if; |
32ae9b22 | 453 | |
e5d89254 | 454 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 ML |
455 | if (!primary_if) |
456 | goto out; | |
c6c8fea2 | 457 | |
785ea114 | 458 | batadv_dat_init_own_addr(bat_priv, primary_if); |
08adf151 | 459 | batadv_bla_update_orig_address(bat_priv, primary_if, oldif); |
32ae9b22 ML |
460 | out: |
461 | if (primary_if) | |
82047ad7 | 462 | batadv_hardif_put(primary_if); |
c6c8fea2 SE |
463 | } |
464 | ||
56303d34 SE |
465 | static void batadv_primary_if_select(struct batadv_priv *bat_priv, |
466 | struct batadv_hard_iface *new_hard_iface) | |
c6c8fea2 | 467 | { |
56303d34 | 468 | struct batadv_hard_iface *curr_hard_iface; |
c6c8fea2 | 469 | |
c3caf519 | 470 | ASSERT_RTNL(); |
c6c8fea2 | 471 | |
17a86915 SE |
472 | if (new_hard_iface) |
473 | kref_get(&new_hard_iface->refcount); | |
c6c8fea2 | 474 | |
728cbc6a | 475 | curr_hard_iface = rcu_dereference_protected(bat_priv->primary_if, 1); |
32ae9b22 | 476 | rcu_assign_pointer(bat_priv->primary_if, new_hard_iface); |
c6c8fea2 | 477 | |
32ae9b22 | 478 | if (!new_hard_iface) |
23721387 | 479 | goto out; |
32ae9b22 | 480 | |
29824a55 | 481 | bat_priv->algo_ops->iface.primary_set(new_hard_iface); |
18a1cb6e | 482 | batadv_primary_if_update_addr(bat_priv, curr_hard_iface); |
23721387 SW |
483 | |
484 | out: | |
485 | if (curr_hard_iface) | |
82047ad7 | 486 | batadv_hardif_put(curr_hard_iface); |
c6c8fea2 SE |
487 | } |
488 | ||
56303d34 SE |
489 | static bool |
490 | batadv_hardif_is_iface_up(const struct batadv_hard_iface *hard_iface) | |
c6c8fea2 | 491 | { |
e6c10f43 | 492 | if (hard_iface->net_dev->flags & IFF_UP) |
c6c8fea2 SE |
493 | return true; |
494 | ||
495 | return false; | |
496 | } | |
497 | ||
18a1cb6e | 498 | static void batadv_check_known_mac_addr(const struct net_device *net_dev) |
c6c8fea2 | 499 | { |
56303d34 | 500 | const struct batadv_hard_iface *hard_iface; |
c6c8fea2 SE |
501 | |
502 | rcu_read_lock(); | |
3193e8fd | 503 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
825ffe1f SE |
504 | if (hard_iface->if_status != BATADV_IF_ACTIVE && |
505 | hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED) | |
c6c8fea2 SE |
506 | continue; |
507 | ||
e6c10f43 | 508 | if (hard_iface->net_dev == net_dev) |
c6c8fea2 SE |
509 | continue; |
510 | ||
1eda58bf SE |
511 | if (!batadv_compare_eth(hard_iface->net_dev->dev_addr, |
512 | net_dev->dev_addr)) | |
c6c8fea2 SE |
513 | continue; |
514 | ||
67969581 SE |
515 | pr_warn("The newly added mac address (%pM) already exists on: %s\n", |
516 | net_dev->dev_addr, hard_iface->net_dev->name); | |
517 | pr_warn("It is strongly recommended to keep mac addresses unique to avoid problems!\n"); | |
c6c8fea2 SE |
518 | } |
519 | rcu_read_unlock(); | |
520 | } | |
521 | ||
7bca68c7 SE |
522 | /** |
523 | * batadv_hardif_recalc_extra_skbroom() - Recalculate skbuff extra head/tailroom | |
524 | * @soft_iface: netdev struct of the mesh interface | |
525 | */ | |
526 | static void batadv_hardif_recalc_extra_skbroom(struct net_device *soft_iface) | |
527 | { | |
528 | const struct batadv_hard_iface *hard_iface; | |
529 | unsigned short lower_header_len = ETH_HLEN; | |
530 | unsigned short lower_headroom = 0; | |
531 | unsigned short lower_tailroom = 0; | |
532 | unsigned short needed_headroom; | |
533 | ||
534 | rcu_read_lock(); | |
535 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
536 | if (hard_iface->if_status == BATADV_IF_NOT_IN_USE) | |
537 | continue; | |
538 | ||
539 | if (hard_iface->soft_iface != soft_iface) | |
540 | continue; | |
541 | ||
542 | lower_header_len = max_t(unsigned short, lower_header_len, | |
543 | hard_iface->net_dev->hard_header_len); | |
544 | ||
545 | lower_headroom = max_t(unsigned short, lower_headroom, | |
546 | hard_iface->net_dev->needed_headroom); | |
547 | ||
548 | lower_tailroom = max_t(unsigned short, lower_tailroom, | |
549 | hard_iface->net_dev->needed_tailroom); | |
550 | } | |
551 | rcu_read_unlock(); | |
552 | ||
553 | needed_headroom = lower_headroom + (lower_header_len - ETH_HLEN); | |
554 | needed_headroom += batadv_max_header_len(); | |
555 | ||
556 | soft_iface->needed_headroom = needed_headroom; | |
557 | soft_iface->needed_tailroom = lower_tailroom; | |
558 | } | |
559 | ||
ff15c27c SE |
560 | /** |
561 | * batadv_hardif_min_mtu() - Calculate maximum MTU for soft interface | |
562 | * @soft_iface: netdev struct of the soft interface | |
563 | * | |
564 | * Return: MTU for the soft-interface (limited by the minimal MTU of all active | |
565 | * slave interfaces) | |
566 | */ | |
9563877e | 567 | int batadv_hardif_min_mtu(struct net_device *soft_iface) |
c6c8fea2 | 568 | { |
a19d3d85 | 569 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
56303d34 | 570 | const struct batadv_hard_iface *hard_iface; |
930cd6e4 | 571 | int min_mtu = INT_MAX; |
c6c8fea2 SE |
572 | |
573 | rcu_read_lock(); | |
3193e8fd | 574 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
825ffe1f SE |
575 | if (hard_iface->if_status != BATADV_IF_ACTIVE && |
576 | hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED) | |
c6c8fea2 SE |
577 | continue; |
578 | ||
e6c10f43 | 579 | if (hard_iface->soft_iface != soft_iface) |
c6c8fea2 SE |
580 | continue; |
581 | ||
a19d3d85 | 582 | min_mtu = min_t(int, hard_iface->net_dev->mtu, min_mtu); |
c6c8fea2 SE |
583 | } |
584 | rcu_read_unlock(); | |
a19d3d85 | 585 | |
a19d3d85 ML |
586 | if (atomic_read(&bat_priv->fragmentation) == 0) |
587 | goto out; | |
588 | ||
589 | /* with fragmentation enabled the maximum size of internally generated | |
590 | * packets such as translation table exchanges or tvlv containers, etc | |
591 | * has to be calculated | |
592 | */ | |
593 | min_mtu = min_t(int, min_mtu, BATADV_FRAG_MAX_FRAG_SIZE); | |
594 | min_mtu -= sizeof(struct batadv_frag_packet); | |
595 | min_mtu *= BATADV_FRAG_MAX_FRAGMENTS; | |
a19d3d85 | 596 | |
c6c8fea2 | 597 | out: |
930cd6e4 AQ |
598 | /* report to the other components the maximum amount of bytes that |
599 | * batman-adv can send over the wire (without considering the payload | |
600 | * overhead). For example, this value is used by TT to compute the | |
601 | * maximum local table table size | |
602 | */ | |
603 | atomic_set(&bat_priv->packet_size_max, min_mtu); | |
604 | ||
605 | /* the real soft-interface MTU is computed by removing the payload | |
606 | * overhead from the maximum amount of bytes that was just computed. | |
607 | * | |
608 | * However batman-adv does not support MTUs bigger than ETH_DATA_LEN | |
609 | */ | |
610 | return min_t(int, min_mtu - batadv_max_header_len(), ETH_DATA_LEN); | |
c6c8fea2 SE |
611 | } |
612 | ||
ff15c27c SE |
613 | /** |
614 | * batadv_update_min_mtu() - Adjusts the MTU if a new interface with a smaller | |
615 | * MTU appeared | |
616 | * @soft_iface: netdev struct of the soft interface | |
617 | */ | |
9563877e | 618 | void batadv_update_min_mtu(struct net_device *soft_iface) |
c6c8fea2 | 619 | { |
a19d3d85 | 620 | soft_iface->mtu = batadv_hardif_min_mtu(soft_iface); |
c6c8fea2 | 621 | |
a19d3d85 ML |
622 | /* Check if the local translate table should be cleaned up to match a |
623 | * new (and smaller) MTU. | |
624 | */ | |
625 | batadv_tt_local_resize_to_mtu(soft_iface); | |
c6c8fea2 SE |
626 | } |
627 | ||
56303d34 SE |
628 | static void |
629 | batadv_hardif_activate_interface(struct batadv_hard_iface *hard_iface) | |
c6c8fea2 | 630 | { |
56303d34 SE |
631 | struct batadv_priv *bat_priv; |
632 | struct batadv_hard_iface *primary_if = NULL; | |
c6c8fea2 | 633 | |
e9a4f295 | 634 | if (hard_iface->if_status != BATADV_IF_INACTIVE) |
32ae9b22 | 635 | goto out; |
c6c8fea2 | 636 | |
e6c10f43 | 637 | bat_priv = netdev_priv(hard_iface->soft_iface); |
c6c8fea2 | 638 | |
29824a55 | 639 | bat_priv->algo_ops->iface.update_mac(hard_iface); |
e9a4f295 | 640 | hard_iface->if_status = BATADV_IF_TO_BE_ACTIVATED; |
c6c8fea2 | 641 | |
9cfc7bd6 | 642 | /* the first active interface becomes our primary interface or |
015758d0 | 643 | * the next active interface after the old primary interface was removed |
c6c8fea2 | 644 | */ |
e5d89254 | 645 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 646 | if (!primary_if) |
18a1cb6e | 647 | batadv_primary_if_select(bat_priv, hard_iface); |
c6c8fea2 | 648 | |
3e34819e SE |
649 | batadv_info(hard_iface->soft_iface, "Interface activated: %s\n", |
650 | hard_iface->net_dev->name); | |
c6c8fea2 | 651 | |
9563877e | 652 | batadv_update_min_mtu(hard_iface->soft_iface); |
32ae9b22 | 653 | |
29824a55 AQ |
654 | if (bat_priv->algo_ops->iface.activate) |
655 | bat_priv->algo_ops->iface.activate(hard_iface); | |
b6cf5d49 | 656 | |
32ae9b22 ML |
657 | out: |
658 | if (primary_if) | |
82047ad7 | 659 | batadv_hardif_put(primary_if); |
c6c8fea2 SE |
660 | } |
661 | ||
56303d34 SE |
662 | static void |
663 | batadv_hardif_deactivate_interface(struct batadv_hard_iface *hard_iface) | |
c6c8fea2 | 664 | { |
825ffe1f SE |
665 | if (hard_iface->if_status != BATADV_IF_ACTIVE && |
666 | hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED) | |
c6c8fea2 SE |
667 | return; |
668 | ||
e9a4f295 | 669 | hard_iface->if_status = BATADV_IF_INACTIVE; |
c6c8fea2 | 670 | |
3e34819e SE |
671 | batadv_info(hard_iface->soft_iface, "Interface deactivated: %s\n", |
672 | hard_iface->net_dev->name); | |
c6c8fea2 | 673 | |
9563877e | 674 | batadv_update_min_mtu(hard_iface->soft_iface); |
c6c8fea2 SE |
675 | } |
676 | ||
cb4b0d48 | 677 | /** |
7e9a8c2c | 678 | * batadv_master_del_slave() - remove hard_iface from the current master iface |
cb4b0d48 AQ |
679 | * @slave: the interface enslaved in another master |
680 | * @master: the master from which slave has to be removed | |
681 | * | |
682 | * Invoke ndo_del_slave on master passing slave as argument. In this way slave | |
683 | * is free'd and master can correctly change its internal state. | |
62fe710f SE |
684 | * |
685 | * Return: 0 on success, a negative value representing the error otherwise | |
cb4b0d48 AQ |
686 | */ |
687 | static int batadv_master_del_slave(struct batadv_hard_iface *slave, | |
688 | struct net_device *master) | |
689 | { | |
690 | int ret; | |
691 | ||
692 | if (!master) | |
693 | return 0; | |
694 | ||
695 | ret = -EBUSY; | |
696 | if (master->netdev_ops->ndo_del_slave) | |
697 | ret = master->netdev_ops->ndo_del_slave(master, slave->net_dev); | |
698 | ||
699 | return ret; | |
700 | } | |
701 | ||
ff15c27c SE |
702 | /** |
703 | * batadv_hardif_enable_interface() - Enslave hard interface to soft interface | |
704 | * @hard_iface: hard interface to add to soft interface | |
705 | * @net: the applicable net namespace | |
706 | * @iface_name: name of the soft interface | |
707 | * | |
708 | * Return: 0 on success or negative error number in case of failure | |
709 | */ | |
56303d34 | 710 | int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, |
2cd45a06 | 711 | struct net *net, const char *iface_name) |
c6c8fea2 | 712 | { |
56303d34 | 713 | struct batadv_priv *bat_priv; |
cb4b0d48 | 714 | struct net_device *soft_iface, *master; |
293e9338 | 715 | __be16 ethertype = htons(ETH_P_BATMAN); |
411d6ed9 | 716 | int max_header_len = batadv_max_header_len(); |
e44d8fe2 | 717 | int ret; |
c6c8fea2 | 718 | |
e9a4f295 | 719 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
720 | goto out; |
721 | ||
17a86915 | 722 | kref_get(&hard_iface->refcount); |
ed75ccbe | 723 | |
2cd45a06 | 724 | soft_iface = dev_get_by_name(net, iface_name); |
c6c8fea2 | 725 | |
e44d8fe2 | 726 | if (!soft_iface) { |
2cd45a06 | 727 | soft_iface = batadv_softif_create(net, iface_name); |
c6c8fea2 | 728 | |
e44d8fe2 SE |
729 | if (!soft_iface) { |
730 | ret = -ENOMEM; | |
c6c8fea2 | 731 | goto err; |
e44d8fe2 | 732 | } |
c6c8fea2 SE |
733 | |
734 | /* dev_get_by_name() increases the reference counter for us */ | |
e44d8fe2 SE |
735 | dev_hold(soft_iface); |
736 | } | |
737 | ||
04b482a2 | 738 | if (!batadv_softif_is_valid(soft_iface)) { |
86ceb360 | 739 | pr_err("Can't create batman mesh interface %s: already exists as regular interface\n", |
e44d8fe2 | 740 | soft_iface->name); |
e44d8fe2 | 741 | ret = -EINVAL; |
77af7575 | 742 | goto err_dev; |
c6c8fea2 SE |
743 | } |
744 | ||
cb4b0d48 AQ |
745 | /* check if the interface is enslaved in another virtual one and |
746 | * in that case unlink it first | |
747 | */ | |
748 | master = netdev_master_upper_dev_get(hard_iface->net_dev); | |
749 | ret = batadv_master_del_slave(hard_iface, master); | |
750 | if (ret) | |
751 | goto err_dev; | |
752 | ||
e44d8fe2 | 753 | hard_iface->soft_iface = soft_iface; |
e6c10f43 | 754 | bat_priv = netdev_priv(hard_iface->soft_iface); |
d0b9fd89 | 755 | |
6dffb044 | 756 | ret = netdev_master_upper_dev_link(hard_iface->net_dev, |
42ab19ee | 757 | soft_iface, NULL, NULL, NULL); |
3dbd550b SE |
758 | if (ret) |
759 | goto err_dev; | |
760 | ||
29824a55 | 761 | ret = bat_priv->algo_ops->iface.enable(hard_iface); |
5346c35e | 762 | if (ret < 0) |
3dbd550b | 763 | goto err_upper; |
c6c8fea2 | 764 | |
e9a4f295 | 765 | hard_iface->if_status = BATADV_IF_INACTIVE; |
c6c8fea2 | 766 | |
d7d6de95 | 767 | kref_get(&hard_iface->refcount); |
7e071c79 | 768 | hard_iface->batman_adv_ptype.type = ethertype; |
3193e8fd | 769 | hard_iface->batman_adv_ptype.func = batadv_batman_skb_recv; |
e6c10f43 ML |
770 | hard_iface->batman_adv_ptype.dev = hard_iface->net_dev; |
771 | dev_add_pack(&hard_iface->batman_adv_ptype); | |
c6c8fea2 | 772 | |
3e34819e SE |
773 | batadv_info(hard_iface->soft_iface, "Adding interface: %s\n", |
774 | hard_iface->net_dev->name); | |
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. 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 | 780 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
411d6ed9 | 781 | ETH_DATA_LEN + max_header_len); |
c6c8fea2 | 782 | |
0aca2369 | 783 | if (!atomic_read(&bat_priv->fragmentation) && |
411d6ed9 | 784 | hard_iface->net_dev->mtu < ETH_DATA_LEN + max_header_len) |
3e34819e | 785 | batadv_info(hard_iface->soft_iface, |
411d6ed9 | 786 | "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 | 787 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
411d6ed9 | 788 | ETH_DATA_LEN + max_header_len); |
c6c8fea2 | 789 | |
18a1cb6e SE |
790 | if (batadv_hardif_is_iface_up(hard_iface)) |
791 | batadv_hardif_activate_interface(hard_iface); | |
c6c8fea2 | 792 | else |
3e34819e SE |
793 | batadv_err(hard_iface->soft_iface, |
794 | "Not using interface %s (retrying later): interface not active\n", | |
795 | hard_iface->net_dev->name); | |
c6c8fea2 | 796 | |
7bca68c7 SE |
797 | batadv_hardif_recalc_extra_skbroom(soft_iface); |
798 | ||
9e6b5648 SE |
799 | if (bat_priv->algo_ops->iface.enabled) |
800 | bat_priv->algo_ops->iface.enabled(hard_iface); | |
801 | ||
c6c8fea2 SE |
802 | out: |
803 | return 0; | |
804 | ||
3dbd550b SE |
805 | err_upper: |
806 | netdev_upper_dev_unlink(hard_iface->net_dev, soft_iface); | |
77af7575 | 807 | err_dev: |
3dbd550b | 808 | hard_iface->soft_iface = NULL; |
77af7575 | 809 | dev_put(soft_iface); |
c6c8fea2 | 810 | err: |
82047ad7 | 811 | batadv_hardif_put(hard_iface); |
e44d8fe2 | 812 | return ret; |
c6c8fea2 SE |
813 | } |
814 | ||
dee222c7 SE |
815 | /** |
816 | * batadv_hardif_cnt() - get number of interfaces enslaved to soft interface | |
817 | * @soft_iface: soft interface to check | |
818 | * | |
819 | * This function is only using RCU for locking - the result can therefore be | |
820 | * off when another functions is modifying the list at the same time. The | |
821 | * caller can use the rtnl_lock to make sure that the count is accurate. | |
822 | * | |
823 | * Return: number of connected/enslaved hard interfaces | |
824 | */ | |
825 | static size_t batadv_hardif_cnt(const struct net_device *soft_iface) | |
826 | { | |
827 | struct batadv_hard_iface *hard_iface; | |
828 | size_t count = 0; | |
829 | ||
830 | rcu_read_lock(); | |
831 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
832 | if (hard_iface->soft_iface != soft_iface) | |
833 | continue; | |
834 | ||
835 | count++; | |
836 | } | |
837 | rcu_read_unlock(); | |
838 | ||
839 | return count; | |
840 | } | |
841 | ||
ff15c27c SE |
842 | /** |
843 | * batadv_hardif_disable_interface() - Remove hard interface from soft interface | |
844 | * @hard_iface: hard interface to be removed | |
845 | * @autodel: whether to delete soft interface when it doesn't contain any other | |
846 | * slave interfaces | |
847 | */ | |
a15fd361 SE |
848 | void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface, |
849 | enum batadv_hard_if_cleanup autodel) | |
c6c8fea2 | 850 | { |
56303d34 SE |
851 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
852 | struct batadv_hard_iface *primary_if = NULL; | |
c6c8fea2 | 853 | |
f2d23861 | 854 | batadv_hardif_deactivate_interface(hard_iface); |
c6c8fea2 | 855 | |
e9a4f295 | 856 | if (hard_iface->if_status != BATADV_IF_INACTIVE) |
32ae9b22 | 857 | goto out; |
c6c8fea2 | 858 | |
3e34819e SE |
859 | batadv_info(hard_iface->soft_iface, "Removing interface: %s\n", |
860 | hard_iface->net_dev->name); | |
e6c10f43 | 861 | dev_remove_pack(&hard_iface->batman_adv_ptype); |
d7d6de95 | 862 | batadv_hardif_put(hard_iface); |
c6c8fea2 | 863 | |
e5d89254 | 864 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 865 | if (hard_iface == primary_if) { |
56303d34 | 866 | struct batadv_hard_iface *new_if; |
c6c8fea2 | 867 | |
18a1cb6e SE |
868 | new_if = batadv_hardif_get_active(hard_iface->soft_iface); |
869 | batadv_primary_if_select(bat_priv, new_if); | |
c6c8fea2 SE |
870 | |
871 | if (new_if) | |
82047ad7 | 872 | batadv_hardif_put(new_if); |
c6c8fea2 SE |
873 | } |
874 | ||
29824a55 | 875 | bat_priv->algo_ops->iface.disable(hard_iface); |
e9a4f295 | 876 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; |
c6c8fea2 | 877 | |
e6c10f43 | 878 | /* delete all references to this hard_iface */ |
7d211efc | 879 | batadv_purge_orig_ref(bat_priv); |
9455e34c | 880 | batadv_purge_outstanding_packets(bat_priv, hard_iface); |
e6c10f43 | 881 | dev_put(hard_iface->soft_iface); |
c6c8fea2 | 882 | |
a5256f7e | 883 | netdev_upper_dev_unlink(hard_iface->net_dev, hard_iface->soft_iface); |
7bca68c7 | 884 | batadv_hardif_recalc_extra_skbroom(hard_iface->soft_iface); |
a5256f7e | 885 | |
c6c8fea2 | 886 | /* nobody uses this interface anymore */ |
dee222c7 | 887 | if (batadv_hardif_cnt(hard_iface->soft_iface) <= 1) { |
8257f55a AQ |
888 | batadv_gw_check_client_stop(bat_priv); |
889 | ||
890 | if (autodel == BATADV_IF_CLEANUP_AUTO) | |
891 | batadv_softif_destroy_sysfs(hard_iface->soft_iface); | |
892 | } | |
c6c8fea2 | 893 | |
27915aa6 | 894 | hard_iface->soft_iface = NULL; |
82047ad7 | 895 | batadv_hardif_put(hard_iface); |
32ae9b22 ML |
896 | |
897 | out: | |
898 | if (primary_if) | |
82047ad7 | 899 | batadv_hardif_put(primary_if); |
c6c8fea2 SE |
900 | } |
901 | ||
56303d34 | 902 | static struct batadv_hard_iface * |
18a1cb6e | 903 | batadv_hardif_add_interface(struct net_device *net_dev) |
c6c8fea2 | 904 | { |
56303d34 | 905 | struct batadv_hard_iface *hard_iface; |
c6c8fea2 SE |
906 | int ret; |
907 | ||
c3caf519 SE |
908 | ASSERT_RTNL(); |
909 | ||
4b426b10 | 910 | if (!batadv_is_valid_iface(net_dev)) |
c6c8fea2 SE |
911 | goto out; |
912 | ||
913 | dev_hold(net_dev); | |
914 | ||
7db3fc29 | 915 | hard_iface = kzalloc(sizeof(*hard_iface), GFP_ATOMIC); |
320f422f | 916 | if (!hard_iface) |
c6c8fea2 | 917 | goto release_dev; |
c6c8fea2 | 918 | |
5853e22c | 919 | ret = batadv_sysfs_add_hardif(&hard_iface->hardif_obj, net_dev); |
c6c8fea2 SE |
920 | if (ret) |
921 | goto free_if; | |
922 | ||
e6c10f43 ML |
923 | hard_iface->net_dev = net_dev; |
924 | hard_iface->soft_iface = NULL; | |
e9a4f295 | 925 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; |
5bc7c1eb | 926 | |
3bcacd1e | 927 | batadv_debugfs_add_hardif(hard_iface); |
5bc7c1eb | 928 | |
e6c10f43 | 929 | INIT_LIST_HEAD(&hard_iface->list); |
cef63419 | 930 | INIT_HLIST_HEAD(&hard_iface->neigh_list); |
5bc44dc8 | 931 | |
cef63419 | 932 | spin_lock_init(&hard_iface->neigh_list_lock); |
b2367e46 | 933 | kref_init(&hard_iface->refcount); |
cef63419 | 934 | |
caf65bfc | 935 | hard_iface->num_bcasts = BATADV_NUM_BCASTS_DEFAULT; |
10b1bbb4 SE |
936 | hard_iface->wifi_flags = batadv_wifi_flags_evaluate(net_dev); |
937 | if (batadv_is_wifi_hardif(hard_iface)) | |
caf65bfc MS |
938 | hard_iface->num_bcasts = BATADV_NUM_BCASTS_WIRELESS; |
939 | ||
7db682d1 ML |
940 | batadv_v_hardif_init(hard_iface); |
941 | ||
18a1cb6e | 942 | batadv_check_known_mac_addr(hard_iface->net_dev); |
b2367e46 | 943 | kref_get(&hard_iface->refcount); |
3193e8fd | 944 | list_add_tail_rcu(&hard_iface->list, &batadv_hardif_list); |
fb69be69 | 945 | batadv_hardif_generation++; |
c6c8fea2 | 946 | |
e6c10f43 | 947 | return hard_iface; |
c6c8fea2 SE |
948 | |
949 | free_if: | |
e6c10f43 | 950 | kfree(hard_iface); |
c6c8fea2 SE |
951 | release_dev: |
952 | dev_put(net_dev); | |
953 | out: | |
954 | return NULL; | |
955 | } | |
956 | ||
56303d34 | 957 | static void batadv_hardif_remove_interface(struct batadv_hard_iface *hard_iface) |
c6c8fea2 | 958 | { |
c3caf519 SE |
959 | ASSERT_RTNL(); |
960 | ||
c6c8fea2 | 961 | /* first deactivate interface */ |
e9a4f295 | 962 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
a15fd361 | 963 | batadv_hardif_disable_interface(hard_iface, |
06d640c9 | 964 | BATADV_IF_CLEANUP_KEEP); |
c6c8fea2 | 965 | |
e9a4f295 | 966 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
967 | return; |
968 | ||
e9a4f295 | 969 | hard_iface->if_status = BATADV_IF_TO_BE_REMOVED; |
569c9850 SE |
970 | batadv_debugfs_del_hardif(hard_iface); |
971 | batadv_sysfs_del_hardif(&hard_iface->hardif_obj); | |
972 | batadv_hardif_put(hard_iface); | |
c6c8fea2 SE |
973 | } |
974 | ||
ff15c27c SE |
975 | /** |
976 | * batadv_hardif_remove_interfaces() - Remove all hard interfaces | |
977 | */ | |
9563877e | 978 | void batadv_hardif_remove_interfaces(void) |
c6c8fea2 | 979 | { |
56303d34 | 980 | struct batadv_hard_iface *hard_iface, *hard_iface_tmp; |
c6c8fea2 | 981 | |
c3caf519 | 982 | rtnl_lock(); |
e6c10f43 | 983 | list_for_each_entry_safe(hard_iface, hard_iface_tmp, |
3193e8fd | 984 | &batadv_hardif_list, list) { |
e6c10f43 | 985 | list_del_rcu(&hard_iface->list); |
fb69be69 | 986 | batadv_hardif_generation++; |
18a1cb6e | 987 | batadv_hardif_remove_interface(hard_iface); |
c6c8fea2 SE |
988 | } |
989 | rtnl_unlock(); | |
990 | } | |
991 | ||
6da7be7d SE |
992 | /** |
993 | * batadv_hard_if_event_softif() - Handle events for soft interfaces | |
994 | * @event: NETDEV_* event to handle | |
995 | * @net_dev: net_device which generated an event | |
996 | * | |
997 | * Return: NOTIFY_* result | |
998 | */ | |
999 | static int batadv_hard_if_event_softif(unsigned long event, | |
1000 | struct net_device *net_dev) | |
1001 | { | |
1002 | struct batadv_priv *bat_priv; | |
1003 | ||
1004 | switch (event) { | |
1005 | case NETDEV_REGISTER: | |
1006 | batadv_sysfs_add_meshif(net_dev); | |
1007 | bat_priv = netdev_priv(net_dev); | |
1008 | batadv_softif_create_vlan(bat_priv, BATADV_NO_FLAGS); | |
1009 | break; | |
1010 | case NETDEV_CHANGENAME: | |
1011 | batadv_debugfs_rename_meshif(net_dev); | |
1012 | break; | |
1013 | } | |
1014 | ||
1015 | return NOTIFY_DONE; | |
1016 | } | |
1017 | ||
18a1cb6e SE |
1018 | static int batadv_hard_if_event(struct notifier_block *this, |
1019 | unsigned long event, void *ptr) | |
c6c8fea2 | 1020 | { |
351638e7 | 1021 | struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); |
56303d34 SE |
1022 | struct batadv_hard_iface *hard_iface; |
1023 | struct batadv_hard_iface *primary_if = NULL; | |
1024 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 1025 | |
6da7be7d SE |
1026 | if (batadv_softif_is_valid(net_dev)) |
1027 | return batadv_hard_if_event_softif(event, net_dev); | |
37130293 | 1028 | |
56303d34 | 1029 | hard_iface = batadv_hardif_get_by_netdev(net_dev); |
a1a66b11 AL |
1030 | if (!hard_iface && (event == NETDEV_REGISTER || |
1031 | event == NETDEV_POST_TYPE_CHANGE)) | |
18a1cb6e | 1032 | hard_iface = batadv_hardif_add_interface(net_dev); |
c6c8fea2 | 1033 | |
e6c10f43 | 1034 | if (!hard_iface) |
c6c8fea2 SE |
1035 | goto out; |
1036 | ||
1037 | switch (event) { | |
1038 | case NETDEV_UP: | |
18a1cb6e | 1039 | batadv_hardif_activate_interface(hard_iface); |
c6c8fea2 SE |
1040 | break; |
1041 | case NETDEV_GOING_DOWN: | |
1042 | case NETDEV_DOWN: | |
18a1cb6e | 1043 | batadv_hardif_deactivate_interface(hard_iface); |
c6c8fea2 SE |
1044 | break; |
1045 | case NETDEV_UNREGISTER: | |
a1a66b11 | 1046 | case NETDEV_PRE_TYPE_CHANGE: |
e6c10f43 | 1047 | list_del_rcu(&hard_iface->list); |
fb69be69 | 1048 | batadv_hardif_generation++; |
c6c8fea2 | 1049 | |
18a1cb6e | 1050 | batadv_hardif_remove_interface(hard_iface); |
c6c8fea2 SE |
1051 | break; |
1052 | case NETDEV_CHANGEMTU: | |
e6c10f43 | 1053 | if (hard_iface->soft_iface) |
9563877e | 1054 | batadv_update_min_mtu(hard_iface->soft_iface); |
c6c8fea2 SE |
1055 | break; |
1056 | case NETDEV_CHANGEADDR: | |
e9a4f295 | 1057 | if (hard_iface->if_status == BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
1058 | goto hardif_put; |
1059 | ||
18a1cb6e | 1060 | batadv_check_known_mac_addr(hard_iface->net_dev); |
c6c8fea2 | 1061 | |
e6c10f43 | 1062 | bat_priv = netdev_priv(hard_iface->soft_iface); |
29824a55 | 1063 | bat_priv->algo_ops->iface.update_mac(hard_iface); |
01c4224b | 1064 | |
e5d89254 | 1065 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 ML |
1066 | if (!primary_if) |
1067 | goto hardif_put; | |
1068 | ||
1069 | if (hard_iface == primary_if) | |
18a1cb6e | 1070 | batadv_primary_if_update_addr(bat_priv, NULL); |
c6c8fea2 | 1071 | break; |
ee3b5e9f SE |
1072 | case NETDEV_CHANGEUPPER: |
1073 | hard_iface->wifi_flags = batadv_wifi_flags_evaluate(net_dev); | |
1074 | if (batadv_is_wifi_hardif(hard_iface)) | |
1075 | hard_iface->num_bcasts = BATADV_NUM_BCASTS_WIRELESS; | |
1076 | break; | |
36dc621c SE |
1077 | case NETDEV_CHANGENAME: |
1078 | batadv_debugfs_rename_hardif(hard_iface); | |
1079 | break; | |
c6c8fea2 SE |
1080 | default: |
1081 | break; | |
f81c6224 | 1082 | } |
c6c8fea2 SE |
1083 | |
1084 | hardif_put: | |
82047ad7 | 1085 | batadv_hardif_put(hard_iface); |
c6c8fea2 | 1086 | out: |
32ae9b22 | 1087 | if (primary_if) |
82047ad7 | 1088 | batadv_hardif_put(primary_if); |
c6c8fea2 SE |
1089 | return NOTIFY_DONE; |
1090 | } | |
1091 | ||
9563877e | 1092 | struct notifier_block batadv_hard_if_notifier = { |
18a1cb6e | 1093 | .notifier_call = batadv_hard_if_event, |
c6c8fea2 | 1094 | }; |