Commit | Line | Data |
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e19f9759 | 1 | /* Copyright (C) 2007-2014 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 | ||
18 | #include "main.h" | |
785ea114 | 19 | #include "distributed-arp-table.h" |
c6c8fea2 SE |
20 | #include "hard-interface.h" |
21 | #include "soft-interface.h" | |
22 | #include "send.h" | |
23 | #include "translation-table.h" | |
24 | #include "routing.h" | |
b706b13b | 25 | #include "sysfs.h" |
5bc7c1eb | 26 | #include "debugfs.h" |
c6c8fea2 SE |
27 | #include "originator.h" |
28 | #include "hash.h" | |
23721387 | 29 | #include "bridge_loop_avoidance.h" |
8257f55a | 30 | #include "gateway_client.h" |
c6c8fea2 SE |
31 | |
32 | #include <linux/if_arp.h> | |
af5d4f77 | 33 | #include <linux/if_ether.h> |
c6c8fea2 | 34 | |
9563877e | 35 | void batadv_hardif_free_rcu(struct rcu_head *rcu) |
c6c8fea2 | 36 | { |
56303d34 | 37 | struct batadv_hard_iface *hard_iface; |
c6c8fea2 | 38 | |
56303d34 | 39 | hard_iface = container_of(rcu, struct batadv_hard_iface, rcu); |
e6c10f43 ML |
40 | dev_put(hard_iface->net_dev); |
41 | kfree(hard_iface); | |
c6c8fea2 SE |
42 | } |
43 | ||
56303d34 SE |
44 | struct batadv_hard_iface * |
45 | batadv_hardif_get_by_netdev(const struct net_device *net_dev) | |
c6c8fea2 | 46 | { |
56303d34 | 47 | struct batadv_hard_iface *hard_iface; |
c6c8fea2 SE |
48 | |
49 | rcu_read_lock(); | |
3193e8fd | 50 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e6c10f43 ML |
51 | if (hard_iface->net_dev == net_dev && |
52 | atomic_inc_not_zero(&hard_iface->refcount)) | |
c6c8fea2 SE |
53 | goto out; |
54 | } | |
55 | ||
e6c10f43 | 56 | hard_iface = NULL; |
c6c8fea2 SE |
57 | |
58 | out: | |
c6c8fea2 | 59 | rcu_read_unlock(); |
e6c10f43 | 60 | return hard_iface; |
c6c8fea2 SE |
61 | } |
62 | ||
b7eddd0b AQ |
63 | /** |
64 | * batadv_is_on_batman_iface - check if a device is a batman iface descendant | |
65 | * @net_dev: the device to check | |
66 | * | |
67 | * If the user creates any virtual device on top of a batman-adv interface, it | |
68 | * is important to prevent this new interface to be used to create a new mesh | |
69 | * network (this behaviour would lead to a batman-over-batman configuration). | |
70 | * This function recursively checks all the fathers of the device passed as | |
71 | * argument looking for a batman-adv soft interface. | |
72 | * | |
73 | * Returns true if the device is descendant of a batman-adv mesh interface (or | |
74 | * if it is a batman-adv interface itself), false otherwise | |
75 | */ | |
76 | static bool batadv_is_on_batman_iface(const struct net_device *net_dev) | |
77 | { | |
78 | struct net_device *parent_dev; | |
79 | bool ret; | |
80 | ||
81 | /* check if this is a batman-adv mesh interface */ | |
82 | if (batadv_softif_is_valid(net_dev)) | |
83 | return true; | |
84 | ||
85 | /* no more parents..stop recursion */ | |
b6ed5498 | 86 | if (net_dev->iflink == 0 || net_dev->iflink == net_dev->ifindex) |
b7eddd0b AQ |
87 | return false; |
88 | ||
89 | /* recurse over the parent device */ | |
16b77695 | 90 | parent_dev = __dev_get_by_index(&init_net, net_dev->iflink); |
b7eddd0b AQ |
91 | /* if we got a NULL parent_dev there is something broken.. */ |
92 | if (WARN(!parent_dev, "Cannot find parent device")) | |
93 | return false; | |
94 | ||
95 | ret = batadv_is_on_batman_iface(parent_dev); | |
96 | ||
b7eddd0b AQ |
97 | return ret; |
98 | } | |
99 | ||
18a1cb6e | 100 | static int batadv_is_valid_iface(const struct net_device *net_dev) |
c6c8fea2 SE |
101 | { |
102 | if (net_dev->flags & IFF_LOOPBACK) | |
103 | return 0; | |
104 | ||
105 | if (net_dev->type != ARPHRD_ETHER) | |
106 | return 0; | |
107 | ||
108 | if (net_dev->addr_len != ETH_ALEN) | |
109 | return 0; | |
110 | ||
111 | /* no batman over batman */ | |
b7eddd0b | 112 | if (batadv_is_on_batman_iface(net_dev)) |
c6c8fea2 | 113 | return 0; |
c6c8fea2 | 114 | |
c6c8fea2 SE |
115 | return 1; |
116 | } | |
117 | ||
de68d100 MS |
118 | /** |
119 | * batadv_is_wifi_netdev - check if the given net_device struct is a wifi | |
120 | * interface | |
121 | * @net_device: the device to check | |
122 | * | |
123 | * Returns true if the net device is a 802.11 wireless device, false otherwise. | |
124 | */ | |
0c69aecc | 125 | bool batadv_is_wifi_netdev(struct net_device *net_device) |
de68d100 | 126 | { |
0c69aecc AQ |
127 | if (!net_device) |
128 | return false; | |
129 | ||
de68d100 MS |
130 | #ifdef CONFIG_WIRELESS_EXT |
131 | /* pre-cfg80211 drivers have to implement WEXT, so it is possible to | |
132 | * check for wireless_handlers != NULL | |
133 | */ | |
134 | if (net_device->wireless_handlers) | |
135 | return true; | |
136 | #endif | |
137 | ||
138 | /* cfg80211 drivers have to set ieee80211_ptr */ | |
139 | if (net_device->ieee80211_ptr) | |
140 | return true; | |
141 | ||
142 | return false; | |
143 | } | |
144 | ||
56303d34 | 145 | static struct batadv_hard_iface * |
18a1cb6e | 146 | batadv_hardif_get_active(const struct net_device *soft_iface) |
c6c8fea2 | 147 | { |
56303d34 | 148 | struct batadv_hard_iface *hard_iface; |
c6c8fea2 SE |
149 | |
150 | rcu_read_lock(); | |
3193e8fd | 151 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e6c10f43 | 152 | if (hard_iface->soft_iface != soft_iface) |
c6c8fea2 SE |
153 | continue; |
154 | ||
e9a4f295 | 155 | if (hard_iface->if_status == BATADV_IF_ACTIVE && |
e6c10f43 | 156 | atomic_inc_not_zero(&hard_iface->refcount)) |
c6c8fea2 SE |
157 | goto out; |
158 | } | |
159 | ||
e6c10f43 | 160 | hard_iface = NULL; |
c6c8fea2 SE |
161 | |
162 | out: | |
c6c8fea2 | 163 | rcu_read_unlock(); |
e6c10f43 | 164 | return hard_iface; |
c6c8fea2 SE |
165 | } |
166 | ||
56303d34 SE |
167 | static void batadv_primary_if_update_addr(struct batadv_priv *bat_priv, |
168 | struct batadv_hard_iface *oldif) | |
c6c8fea2 | 169 | { |
56303d34 | 170 | struct batadv_hard_iface *primary_if; |
32ae9b22 | 171 | |
e5d89254 | 172 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 ML |
173 | if (!primary_if) |
174 | goto out; | |
c6c8fea2 | 175 | |
785ea114 | 176 | batadv_dat_init_own_addr(bat_priv, primary_if); |
08adf151 | 177 | batadv_bla_update_orig_address(bat_priv, primary_if, oldif); |
32ae9b22 ML |
178 | out: |
179 | if (primary_if) | |
e5d89254 | 180 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
181 | } |
182 | ||
56303d34 SE |
183 | static void batadv_primary_if_select(struct batadv_priv *bat_priv, |
184 | struct batadv_hard_iface *new_hard_iface) | |
c6c8fea2 | 185 | { |
56303d34 | 186 | struct batadv_hard_iface *curr_hard_iface; |
c6c8fea2 | 187 | |
c3caf519 | 188 | ASSERT_RTNL(); |
c6c8fea2 | 189 | |
32ae9b22 ML |
190 | if (new_hard_iface && !atomic_inc_not_zero(&new_hard_iface->refcount)) |
191 | new_hard_iface = NULL; | |
c6c8fea2 | 192 | |
728cbc6a | 193 | curr_hard_iface = rcu_dereference_protected(bat_priv->primary_if, 1); |
32ae9b22 | 194 | rcu_assign_pointer(bat_priv->primary_if, new_hard_iface); |
c6c8fea2 | 195 | |
32ae9b22 | 196 | if (!new_hard_iface) |
23721387 | 197 | goto out; |
32ae9b22 | 198 | |
cd8b78e7 | 199 | bat_priv->bat_algo_ops->bat_primary_iface_set(new_hard_iface); |
18a1cb6e | 200 | batadv_primary_if_update_addr(bat_priv, curr_hard_iface); |
23721387 SW |
201 | |
202 | out: | |
203 | if (curr_hard_iface) | |
e5d89254 | 204 | batadv_hardif_free_ref(curr_hard_iface); |
c6c8fea2 SE |
205 | } |
206 | ||
56303d34 SE |
207 | static bool |
208 | batadv_hardif_is_iface_up(const struct batadv_hard_iface *hard_iface) | |
c6c8fea2 | 209 | { |
e6c10f43 | 210 | if (hard_iface->net_dev->flags & IFF_UP) |
c6c8fea2 SE |
211 | return true; |
212 | ||
213 | return false; | |
214 | } | |
215 | ||
18a1cb6e | 216 | static void batadv_check_known_mac_addr(const struct net_device *net_dev) |
c6c8fea2 | 217 | { |
56303d34 | 218 | const struct batadv_hard_iface *hard_iface; |
c6c8fea2 SE |
219 | |
220 | rcu_read_lock(); | |
3193e8fd | 221 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e9a4f295 SE |
222 | if ((hard_iface->if_status != BATADV_IF_ACTIVE) && |
223 | (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED)) | |
c6c8fea2 SE |
224 | continue; |
225 | ||
e6c10f43 | 226 | if (hard_iface->net_dev == net_dev) |
c6c8fea2 SE |
227 | continue; |
228 | ||
1eda58bf SE |
229 | if (!batadv_compare_eth(hard_iface->net_dev->dev_addr, |
230 | net_dev->dev_addr)) | |
c6c8fea2 SE |
231 | continue; |
232 | ||
67969581 SE |
233 | pr_warn("The newly added mac address (%pM) already exists on: %s\n", |
234 | net_dev->dev_addr, hard_iface->net_dev->name); | |
235 | pr_warn("It is strongly recommended to keep mac addresses unique to avoid problems!\n"); | |
c6c8fea2 SE |
236 | } |
237 | rcu_read_unlock(); | |
238 | } | |
239 | ||
9563877e | 240 | int batadv_hardif_min_mtu(struct net_device *soft_iface) |
c6c8fea2 | 241 | { |
a19d3d85 | 242 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
56303d34 | 243 | const struct batadv_hard_iface *hard_iface; |
930cd6e4 | 244 | int min_mtu = INT_MAX; |
c6c8fea2 SE |
245 | |
246 | rcu_read_lock(); | |
3193e8fd | 247 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e9a4f295 SE |
248 | if ((hard_iface->if_status != BATADV_IF_ACTIVE) && |
249 | (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED)) | |
c6c8fea2 SE |
250 | continue; |
251 | ||
e6c10f43 | 252 | if (hard_iface->soft_iface != soft_iface) |
c6c8fea2 SE |
253 | continue; |
254 | ||
a19d3d85 | 255 | min_mtu = min_t(int, hard_iface->net_dev->mtu, min_mtu); |
c6c8fea2 SE |
256 | } |
257 | rcu_read_unlock(); | |
a19d3d85 | 258 | |
a19d3d85 ML |
259 | if (atomic_read(&bat_priv->fragmentation) == 0) |
260 | goto out; | |
261 | ||
262 | /* with fragmentation enabled the maximum size of internally generated | |
263 | * packets such as translation table exchanges or tvlv containers, etc | |
264 | * has to be calculated | |
265 | */ | |
266 | min_mtu = min_t(int, min_mtu, BATADV_FRAG_MAX_FRAG_SIZE); | |
267 | min_mtu -= sizeof(struct batadv_frag_packet); | |
268 | min_mtu *= BATADV_FRAG_MAX_FRAGMENTS; | |
a19d3d85 | 269 | |
c6c8fea2 | 270 | out: |
930cd6e4 AQ |
271 | /* report to the other components the maximum amount of bytes that |
272 | * batman-adv can send over the wire (without considering the payload | |
273 | * overhead). For example, this value is used by TT to compute the | |
274 | * maximum local table table size | |
275 | */ | |
276 | atomic_set(&bat_priv->packet_size_max, min_mtu); | |
277 | ||
278 | /* the real soft-interface MTU is computed by removing the payload | |
279 | * overhead from the maximum amount of bytes that was just computed. | |
280 | * | |
281 | * However batman-adv does not support MTUs bigger than ETH_DATA_LEN | |
282 | */ | |
283 | return min_t(int, min_mtu - batadv_max_header_len(), ETH_DATA_LEN); | |
c6c8fea2 SE |
284 | } |
285 | ||
286 | /* adjusts the MTU if a new interface with a smaller MTU appeared. */ | |
9563877e | 287 | void batadv_update_min_mtu(struct net_device *soft_iface) |
c6c8fea2 | 288 | { |
a19d3d85 | 289 | soft_iface->mtu = batadv_hardif_min_mtu(soft_iface); |
c6c8fea2 | 290 | |
a19d3d85 ML |
291 | /* Check if the local translate table should be cleaned up to match a |
292 | * new (and smaller) MTU. | |
293 | */ | |
294 | batadv_tt_local_resize_to_mtu(soft_iface); | |
c6c8fea2 SE |
295 | } |
296 | ||
56303d34 SE |
297 | static void |
298 | batadv_hardif_activate_interface(struct batadv_hard_iface *hard_iface) | |
c6c8fea2 | 299 | { |
56303d34 SE |
300 | struct batadv_priv *bat_priv; |
301 | struct batadv_hard_iface *primary_if = NULL; | |
c6c8fea2 | 302 | |
e9a4f295 | 303 | if (hard_iface->if_status != BATADV_IF_INACTIVE) |
32ae9b22 | 304 | goto out; |
c6c8fea2 | 305 | |
e6c10f43 | 306 | bat_priv = netdev_priv(hard_iface->soft_iface); |
c6c8fea2 | 307 | |
c3229398 | 308 | bat_priv->bat_algo_ops->bat_iface_update_mac(hard_iface); |
e9a4f295 | 309 | hard_iface->if_status = BATADV_IF_TO_BE_ACTIVATED; |
c6c8fea2 | 310 | |
9cfc7bd6 | 311 | /* the first active interface becomes our primary interface or |
015758d0 | 312 | * the next active interface after the old primary interface was removed |
c6c8fea2 | 313 | */ |
e5d89254 | 314 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 315 | if (!primary_if) |
18a1cb6e | 316 | batadv_primary_if_select(bat_priv, hard_iface); |
c6c8fea2 | 317 | |
3e34819e SE |
318 | batadv_info(hard_iface->soft_iface, "Interface activated: %s\n", |
319 | hard_iface->net_dev->name); | |
c6c8fea2 | 320 | |
9563877e | 321 | batadv_update_min_mtu(hard_iface->soft_iface); |
32ae9b22 ML |
322 | |
323 | out: | |
324 | if (primary_if) | |
e5d89254 | 325 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
326 | } |
327 | ||
56303d34 SE |
328 | static void |
329 | batadv_hardif_deactivate_interface(struct batadv_hard_iface *hard_iface) | |
c6c8fea2 | 330 | { |
e9a4f295 SE |
331 | if ((hard_iface->if_status != BATADV_IF_ACTIVE) && |
332 | (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED)) | |
c6c8fea2 SE |
333 | return; |
334 | ||
e9a4f295 | 335 | hard_iface->if_status = BATADV_IF_INACTIVE; |
c6c8fea2 | 336 | |
3e34819e SE |
337 | batadv_info(hard_iface->soft_iface, "Interface deactivated: %s\n", |
338 | hard_iface->net_dev->name); | |
c6c8fea2 | 339 | |
9563877e | 340 | batadv_update_min_mtu(hard_iface->soft_iface); |
c6c8fea2 SE |
341 | } |
342 | ||
cb4b0d48 AQ |
343 | /** |
344 | * batadv_master_del_slave - remove hard_iface from the current master interface | |
345 | * @slave: the interface enslaved in another master | |
346 | * @master: the master from which slave has to be removed | |
347 | * | |
348 | * Invoke ndo_del_slave on master passing slave as argument. In this way slave | |
349 | * is free'd and master can correctly change its internal state. | |
350 | * Return 0 on success, a negative value representing the error otherwise | |
351 | */ | |
352 | static int batadv_master_del_slave(struct batadv_hard_iface *slave, | |
353 | struct net_device *master) | |
354 | { | |
355 | int ret; | |
356 | ||
357 | if (!master) | |
358 | return 0; | |
359 | ||
360 | ret = -EBUSY; | |
361 | if (master->netdev_ops->ndo_del_slave) | |
362 | ret = master->netdev_ops->ndo_del_slave(master, slave->net_dev); | |
363 | ||
364 | return ret; | |
365 | } | |
366 | ||
56303d34 | 367 | int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, |
9563877e | 368 | const char *iface_name) |
c6c8fea2 | 369 | { |
56303d34 | 370 | struct batadv_priv *bat_priv; |
cb4b0d48 | 371 | struct net_device *soft_iface, *master; |
293e9338 | 372 | __be16 ethertype = htons(ETH_P_BATMAN); |
411d6ed9 | 373 | int max_header_len = batadv_max_header_len(); |
e44d8fe2 | 374 | int ret; |
c6c8fea2 | 375 | |
e9a4f295 | 376 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
377 | goto out; |
378 | ||
e6c10f43 | 379 | if (!atomic_inc_not_zero(&hard_iface->refcount)) |
ed75ccbe ML |
380 | goto out; |
381 | ||
e44d8fe2 | 382 | soft_iface = dev_get_by_name(&init_net, iface_name); |
c6c8fea2 | 383 | |
e44d8fe2 | 384 | if (!soft_iface) { |
04b482a2 | 385 | soft_iface = batadv_softif_create(iface_name); |
c6c8fea2 | 386 | |
e44d8fe2 SE |
387 | if (!soft_iface) { |
388 | ret = -ENOMEM; | |
c6c8fea2 | 389 | goto err; |
e44d8fe2 | 390 | } |
c6c8fea2 SE |
391 | |
392 | /* dev_get_by_name() increases the reference counter for us */ | |
e44d8fe2 SE |
393 | dev_hold(soft_iface); |
394 | } | |
395 | ||
04b482a2 | 396 | if (!batadv_softif_is_valid(soft_iface)) { |
86ceb360 | 397 | pr_err("Can't create batman mesh interface %s: already exists as regular interface\n", |
e44d8fe2 | 398 | soft_iface->name); |
e44d8fe2 | 399 | ret = -EINVAL; |
77af7575 | 400 | goto err_dev; |
c6c8fea2 SE |
401 | } |
402 | ||
cb4b0d48 AQ |
403 | /* check if the interface is enslaved in another virtual one and |
404 | * in that case unlink it first | |
405 | */ | |
406 | master = netdev_master_upper_dev_get(hard_iface->net_dev); | |
407 | ret = batadv_master_del_slave(hard_iface, master); | |
408 | if (ret) | |
409 | goto err_dev; | |
410 | ||
e44d8fe2 | 411 | hard_iface->soft_iface = soft_iface; |
e6c10f43 | 412 | bat_priv = netdev_priv(hard_iface->soft_iface); |
d0b9fd89 | 413 | |
3dbd550b SE |
414 | ret = netdev_master_upper_dev_link(hard_iface->net_dev, soft_iface); |
415 | if (ret) | |
416 | goto err_dev; | |
417 | ||
77af7575 | 418 | ret = bat_priv->bat_algo_ops->bat_iface_enable(hard_iface); |
5346c35e | 419 | if (ret < 0) |
3dbd550b | 420 | goto err_upper; |
c6c8fea2 | 421 | |
e6c10f43 | 422 | hard_iface->if_num = bat_priv->num_ifaces; |
c6c8fea2 | 423 | bat_priv->num_ifaces++; |
e9a4f295 | 424 | hard_iface->if_status = BATADV_IF_INACTIVE; |
62446307 SW |
425 | ret = batadv_orig_hash_add_if(hard_iface, bat_priv->num_ifaces); |
426 | if (ret < 0) { | |
427 | bat_priv->bat_algo_ops->bat_iface_disable(hard_iface); | |
428 | bat_priv->num_ifaces--; | |
429 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; | |
3dbd550b | 430 | goto err_upper; |
62446307 | 431 | } |
c6c8fea2 | 432 | |
7e071c79 | 433 | hard_iface->batman_adv_ptype.type = ethertype; |
3193e8fd | 434 | hard_iface->batman_adv_ptype.func = batadv_batman_skb_recv; |
e6c10f43 ML |
435 | hard_iface->batman_adv_ptype.dev = hard_iface->net_dev; |
436 | dev_add_pack(&hard_iface->batman_adv_ptype); | |
c6c8fea2 | 437 | |
3e34819e SE |
438 | batadv_info(hard_iface->soft_iface, "Adding interface: %s\n", |
439 | hard_iface->net_dev->name); | |
c6c8fea2 | 440 | |
0aca2369 | 441 | if (atomic_read(&bat_priv->fragmentation) && |
411d6ed9 | 442 | hard_iface->net_dev->mtu < ETH_DATA_LEN + max_header_len) |
3e34819e | 443 | batadv_info(hard_iface->soft_iface, |
411d6ed9 | 444 | "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 | 445 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
411d6ed9 | 446 | ETH_DATA_LEN + max_header_len); |
c6c8fea2 | 447 | |
0aca2369 | 448 | if (!atomic_read(&bat_priv->fragmentation) && |
411d6ed9 | 449 | hard_iface->net_dev->mtu < ETH_DATA_LEN + max_header_len) |
3e34819e | 450 | batadv_info(hard_iface->soft_iface, |
411d6ed9 | 451 | "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 | 452 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
411d6ed9 | 453 | ETH_DATA_LEN + max_header_len); |
c6c8fea2 | 454 | |
18a1cb6e SE |
455 | if (batadv_hardif_is_iface_up(hard_iface)) |
456 | batadv_hardif_activate_interface(hard_iface); | |
c6c8fea2 | 457 | else |
3e34819e SE |
458 | batadv_err(hard_iface->soft_iface, |
459 | "Not using interface %s (retrying later): interface not active\n", | |
460 | hard_iface->net_dev->name); | |
c6c8fea2 SE |
461 | |
462 | /* begin scheduling originator messages on that interface */ | |
9455e34c | 463 | batadv_schedule_bat_ogm(hard_iface); |
c6c8fea2 SE |
464 | |
465 | out: | |
466 | return 0; | |
467 | ||
3dbd550b SE |
468 | err_upper: |
469 | netdev_upper_dev_unlink(hard_iface->net_dev, soft_iface); | |
77af7575 | 470 | err_dev: |
3dbd550b | 471 | hard_iface->soft_iface = NULL; |
77af7575 | 472 | dev_put(soft_iface); |
c6c8fea2 | 473 | err: |
e5d89254 | 474 | batadv_hardif_free_ref(hard_iface); |
e44d8fe2 | 475 | return ret; |
c6c8fea2 SE |
476 | } |
477 | ||
a15fd361 SE |
478 | void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface, |
479 | enum batadv_hard_if_cleanup autodel) | |
c6c8fea2 | 480 | { |
56303d34 SE |
481 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
482 | struct batadv_hard_iface *primary_if = NULL; | |
c6c8fea2 | 483 | |
e9a4f295 | 484 | if (hard_iface->if_status == BATADV_IF_ACTIVE) |
18a1cb6e | 485 | batadv_hardif_deactivate_interface(hard_iface); |
c6c8fea2 | 486 | |
e9a4f295 | 487 | if (hard_iface->if_status != BATADV_IF_INACTIVE) |
32ae9b22 | 488 | goto out; |
c6c8fea2 | 489 | |
3e34819e SE |
490 | batadv_info(hard_iface->soft_iface, "Removing interface: %s\n", |
491 | hard_iface->net_dev->name); | |
e6c10f43 | 492 | dev_remove_pack(&hard_iface->batman_adv_ptype); |
c6c8fea2 SE |
493 | |
494 | bat_priv->num_ifaces--; | |
7d211efc | 495 | batadv_orig_hash_del_if(hard_iface, bat_priv->num_ifaces); |
c6c8fea2 | 496 | |
e5d89254 | 497 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 498 | if (hard_iface == primary_if) { |
56303d34 | 499 | struct batadv_hard_iface *new_if; |
c6c8fea2 | 500 | |
18a1cb6e SE |
501 | new_if = batadv_hardif_get_active(hard_iface->soft_iface); |
502 | batadv_primary_if_select(bat_priv, new_if); | |
c6c8fea2 SE |
503 | |
504 | if (new_if) | |
e5d89254 | 505 | batadv_hardif_free_ref(new_if); |
c6c8fea2 SE |
506 | } |
507 | ||
00a50076 | 508 | bat_priv->bat_algo_ops->bat_iface_disable(hard_iface); |
e9a4f295 | 509 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; |
c6c8fea2 | 510 | |
e6c10f43 | 511 | /* delete all references to this hard_iface */ |
7d211efc | 512 | batadv_purge_orig_ref(bat_priv); |
9455e34c | 513 | batadv_purge_outstanding_packets(bat_priv, hard_iface); |
e6c10f43 | 514 | dev_put(hard_iface->soft_iface); |
c6c8fea2 SE |
515 | |
516 | /* nobody uses this interface anymore */ | |
8257f55a AQ |
517 | if (!bat_priv->num_ifaces) { |
518 | batadv_gw_check_client_stop(bat_priv); | |
519 | ||
520 | if (autodel == BATADV_IF_CLEANUP_AUTO) | |
521 | batadv_softif_destroy_sysfs(hard_iface->soft_iface); | |
522 | } | |
c6c8fea2 | 523 | |
3dbd550b | 524 | netdev_upper_dev_unlink(hard_iface->net_dev, hard_iface->soft_iface); |
e6c10f43 | 525 | hard_iface->soft_iface = NULL; |
e5d89254 | 526 | batadv_hardif_free_ref(hard_iface); |
32ae9b22 ML |
527 | |
528 | out: | |
529 | if (primary_if) | |
e5d89254 | 530 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
531 | } |
532 | ||
5bc44dc8 SW |
533 | /** |
534 | * batadv_hardif_remove_interface_finish - cleans up the remains of a hardif | |
535 | * @work: work queue item | |
536 | * | |
537 | * Free the parts of the hard interface which can not be removed under | |
538 | * rtnl lock (to prevent deadlock situations). | |
539 | */ | |
540 | static void batadv_hardif_remove_interface_finish(struct work_struct *work) | |
541 | { | |
542 | struct batadv_hard_iface *hard_iface; | |
543 | ||
544 | hard_iface = container_of(work, struct batadv_hard_iface, | |
545 | cleanup_work); | |
546 | ||
5bc7c1eb | 547 | batadv_debugfs_del_hardif(hard_iface); |
5bc44dc8 SW |
548 | batadv_sysfs_del_hardif(&hard_iface->hardif_obj); |
549 | batadv_hardif_free_ref(hard_iface); | |
550 | } | |
551 | ||
56303d34 | 552 | static struct batadv_hard_iface * |
18a1cb6e | 553 | batadv_hardif_add_interface(struct net_device *net_dev) |
c6c8fea2 | 554 | { |
56303d34 | 555 | struct batadv_hard_iface *hard_iface; |
c6c8fea2 SE |
556 | int ret; |
557 | ||
c3caf519 SE |
558 | ASSERT_RTNL(); |
559 | ||
18a1cb6e | 560 | ret = batadv_is_valid_iface(net_dev); |
c6c8fea2 SE |
561 | if (ret != 1) |
562 | goto out; | |
563 | ||
564 | dev_hold(net_dev); | |
565 | ||
7db3fc29 | 566 | hard_iface = kzalloc(sizeof(*hard_iface), GFP_ATOMIC); |
320f422f | 567 | if (!hard_iface) |
c6c8fea2 | 568 | goto release_dev; |
c6c8fea2 | 569 | |
5853e22c | 570 | ret = batadv_sysfs_add_hardif(&hard_iface->hardif_obj, net_dev); |
c6c8fea2 SE |
571 | if (ret) |
572 | goto free_if; | |
573 | ||
e6c10f43 ML |
574 | hard_iface->if_num = -1; |
575 | hard_iface->net_dev = net_dev; | |
576 | hard_iface->soft_iface = NULL; | |
e9a4f295 | 577 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; |
5bc7c1eb SW |
578 | |
579 | ret = batadv_debugfs_add_hardif(hard_iface); | |
580 | if (ret) | |
581 | goto free_sysfs; | |
582 | ||
e6c10f43 | 583 | INIT_LIST_HEAD(&hard_iface->list); |
5bc44dc8 SW |
584 | INIT_WORK(&hard_iface->cleanup_work, |
585 | batadv_hardif_remove_interface_finish); | |
586 | ||
caf65bfc MS |
587 | hard_iface->num_bcasts = BATADV_NUM_BCASTS_DEFAULT; |
588 | if (batadv_is_wifi_netdev(net_dev)) | |
589 | hard_iface->num_bcasts = BATADV_NUM_BCASTS_WIRELESS; | |
590 | ||
ed75ccbe | 591 | /* extra reference for return */ |
e6c10f43 | 592 | atomic_set(&hard_iface->refcount, 2); |
c6c8fea2 | 593 | |
18a1cb6e | 594 | batadv_check_known_mac_addr(hard_iface->net_dev); |
3193e8fd | 595 | list_add_tail_rcu(&hard_iface->list, &batadv_hardif_list); |
c6c8fea2 | 596 | |
e6c10f43 | 597 | return hard_iface; |
c6c8fea2 | 598 | |
5bc7c1eb SW |
599 | free_sysfs: |
600 | batadv_sysfs_del_hardif(&hard_iface->hardif_obj); | |
c6c8fea2 | 601 | free_if: |
e6c10f43 | 602 | kfree(hard_iface); |
c6c8fea2 SE |
603 | release_dev: |
604 | dev_put(net_dev); | |
605 | out: | |
606 | return NULL; | |
607 | } | |
608 | ||
56303d34 | 609 | static void batadv_hardif_remove_interface(struct batadv_hard_iface *hard_iface) |
c6c8fea2 | 610 | { |
c3caf519 SE |
611 | ASSERT_RTNL(); |
612 | ||
c6c8fea2 | 613 | /* first deactivate interface */ |
e9a4f295 | 614 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
a15fd361 SE |
615 | batadv_hardif_disable_interface(hard_iface, |
616 | BATADV_IF_CLEANUP_AUTO); | |
c6c8fea2 | 617 | |
e9a4f295 | 618 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
619 | return; |
620 | ||
e9a4f295 | 621 | hard_iface->if_status = BATADV_IF_TO_BE_REMOVED; |
5bc44dc8 | 622 | queue_work(batadv_event_workqueue, &hard_iface->cleanup_work); |
c6c8fea2 SE |
623 | } |
624 | ||
9563877e | 625 | void batadv_hardif_remove_interfaces(void) |
c6c8fea2 | 626 | { |
56303d34 | 627 | struct batadv_hard_iface *hard_iface, *hard_iface_tmp; |
c6c8fea2 | 628 | |
c3caf519 | 629 | rtnl_lock(); |
e6c10f43 | 630 | list_for_each_entry_safe(hard_iface, hard_iface_tmp, |
3193e8fd | 631 | &batadv_hardif_list, list) { |
e6c10f43 | 632 | list_del_rcu(&hard_iface->list); |
18a1cb6e | 633 | batadv_hardif_remove_interface(hard_iface); |
c6c8fea2 SE |
634 | } |
635 | rtnl_unlock(); | |
636 | } | |
637 | ||
18a1cb6e SE |
638 | static int batadv_hard_if_event(struct notifier_block *this, |
639 | unsigned long event, void *ptr) | |
c6c8fea2 | 640 | { |
351638e7 | 641 | struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); |
56303d34 SE |
642 | struct batadv_hard_iface *hard_iface; |
643 | struct batadv_hard_iface *primary_if = NULL; | |
644 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 645 | |
37130293 SE |
646 | if (batadv_softif_is_valid(net_dev) && event == NETDEV_REGISTER) { |
647 | batadv_sysfs_add_meshif(net_dev); | |
5d2c05b2 AQ |
648 | bat_priv = netdev_priv(net_dev); |
649 | batadv_softif_create_vlan(bat_priv, BATADV_NO_FLAGS); | |
37130293 SE |
650 | return NOTIFY_DONE; |
651 | } | |
652 | ||
56303d34 | 653 | hard_iface = batadv_hardif_get_by_netdev(net_dev); |
e6c10f43 | 654 | if (!hard_iface && event == NETDEV_REGISTER) |
18a1cb6e | 655 | hard_iface = batadv_hardif_add_interface(net_dev); |
c6c8fea2 | 656 | |
e6c10f43 | 657 | if (!hard_iface) |
c6c8fea2 SE |
658 | goto out; |
659 | ||
660 | switch (event) { | |
661 | case NETDEV_UP: | |
18a1cb6e | 662 | batadv_hardif_activate_interface(hard_iface); |
c6c8fea2 SE |
663 | break; |
664 | case NETDEV_GOING_DOWN: | |
665 | case NETDEV_DOWN: | |
18a1cb6e | 666 | batadv_hardif_deactivate_interface(hard_iface); |
c6c8fea2 SE |
667 | break; |
668 | case NETDEV_UNREGISTER: | |
e6c10f43 | 669 | list_del_rcu(&hard_iface->list); |
c6c8fea2 | 670 | |
18a1cb6e | 671 | batadv_hardif_remove_interface(hard_iface); |
c6c8fea2 SE |
672 | break; |
673 | case NETDEV_CHANGEMTU: | |
e6c10f43 | 674 | if (hard_iface->soft_iface) |
9563877e | 675 | batadv_update_min_mtu(hard_iface->soft_iface); |
c6c8fea2 SE |
676 | break; |
677 | case NETDEV_CHANGEADDR: | |
e9a4f295 | 678 | if (hard_iface->if_status == BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
679 | goto hardif_put; |
680 | ||
18a1cb6e | 681 | batadv_check_known_mac_addr(hard_iface->net_dev); |
c6c8fea2 | 682 | |
e6c10f43 | 683 | bat_priv = netdev_priv(hard_iface->soft_iface); |
c3229398 | 684 | bat_priv->bat_algo_ops->bat_iface_update_mac(hard_iface); |
01c4224b | 685 | |
e5d89254 | 686 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 ML |
687 | if (!primary_if) |
688 | goto hardif_put; | |
689 | ||
690 | if (hard_iface == primary_if) | |
18a1cb6e | 691 | batadv_primary_if_update_addr(bat_priv, NULL); |
c6c8fea2 SE |
692 | break; |
693 | default: | |
694 | break; | |
f81c6224 | 695 | } |
c6c8fea2 SE |
696 | |
697 | hardif_put: | |
e5d89254 | 698 | batadv_hardif_free_ref(hard_iface); |
c6c8fea2 | 699 | out: |
32ae9b22 | 700 | if (primary_if) |
e5d89254 | 701 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
702 | return NOTIFY_DONE; |
703 | } | |
704 | ||
9563877e | 705 | struct notifier_block batadv_hard_if_notifier = { |
18a1cb6e | 706 | .notifier_call = batadv_hard_if_event, |
c6c8fea2 | 707 | }; |