Commit | Line | Data |
---|---|---|
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 */ | |
86 | if (net_dev->iflink == net_dev->ifindex) | |
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; |
c6c8fea2 | 244 | int min_mtu = ETH_DATA_LEN; |
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 ML |
258 | |
259 | atomic_set(&bat_priv->packet_size_max, min_mtu); | |
260 | ||
261 | if (atomic_read(&bat_priv->fragmentation) == 0) | |
262 | goto out; | |
263 | ||
264 | /* with fragmentation enabled the maximum size of internally generated | |
265 | * packets such as translation table exchanges or tvlv containers, etc | |
266 | * has to be calculated | |
267 | */ | |
268 | min_mtu = min_t(int, min_mtu, BATADV_FRAG_MAX_FRAG_SIZE); | |
269 | min_mtu -= sizeof(struct batadv_frag_packet); | |
270 | min_mtu *= BATADV_FRAG_MAX_FRAGMENTS; | |
271 | atomic_set(&bat_priv->packet_size_max, min_mtu); | |
272 | ||
273 | /* with fragmentation enabled we can fragment external packets easily */ | |
274 | min_mtu = min_t(int, min_mtu, ETH_DATA_LEN); | |
275 | ||
c6c8fea2 | 276 | out: |
a19d3d85 | 277 | return min_mtu - batadv_max_header_len(); |
c6c8fea2 SE |
278 | } |
279 | ||
280 | /* adjusts the MTU if a new interface with a smaller MTU appeared. */ | |
9563877e | 281 | void batadv_update_min_mtu(struct net_device *soft_iface) |
c6c8fea2 | 282 | { |
a19d3d85 | 283 | soft_iface->mtu = batadv_hardif_min_mtu(soft_iface); |
c6c8fea2 | 284 | |
a19d3d85 ML |
285 | /* Check if the local translate table should be cleaned up to match a |
286 | * new (and smaller) MTU. | |
287 | */ | |
288 | batadv_tt_local_resize_to_mtu(soft_iface); | |
c6c8fea2 SE |
289 | } |
290 | ||
56303d34 SE |
291 | static void |
292 | batadv_hardif_activate_interface(struct batadv_hard_iface *hard_iface) | |
c6c8fea2 | 293 | { |
56303d34 SE |
294 | struct batadv_priv *bat_priv; |
295 | struct batadv_hard_iface *primary_if = NULL; | |
c6c8fea2 | 296 | |
e9a4f295 | 297 | if (hard_iface->if_status != BATADV_IF_INACTIVE) |
32ae9b22 | 298 | goto out; |
c6c8fea2 | 299 | |
e6c10f43 | 300 | bat_priv = netdev_priv(hard_iface->soft_iface); |
c6c8fea2 | 301 | |
c3229398 | 302 | bat_priv->bat_algo_ops->bat_iface_update_mac(hard_iface); |
e9a4f295 | 303 | hard_iface->if_status = BATADV_IF_TO_BE_ACTIVATED; |
c6c8fea2 | 304 | |
9cfc7bd6 | 305 | /* the first active interface becomes our primary interface or |
015758d0 | 306 | * the next active interface after the old primary interface was removed |
c6c8fea2 | 307 | */ |
e5d89254 | 308 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 309 | if (!primary_if) |
18a1cb6e | 310 | batadv_primary_if_select(bat_priv, hard_iface); |
c6c8fea2 | 311 | |
3e34819e SE |
312 | batadv_info(hard_iface->soft_iface, "Interface activated: %s\n", |
313 | hard_iface->net_dev->name); | |
c6c8fea2 | 314 | |
9563877e | 315 | batadv_update_min_mtu(hard_iface->soft_iface); |
32ae9b22 ML |
316 | |
317 | out: | |
318 | if (primary_if) | |
e5d89254 | 319 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
320 | } |
321 | ||
56303d34 SE |
322 | static void |
323 | batadv_hardif_deactivate_interface(struct batadv_hard_iface *hard_iface) | |
c6c8fea2 | 324 | { |
e9a4f295 SE |
325 | if ((hard_iface->if_status != BATADV_IF_ACTIVE) && |
326 | (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED)) | |
c6c8fea2 SE |
327 | return; |
328 | ||
e9a4f295 | 329 | hard_iface->if_status = BATADV_IF_INACTIVE; |
c6c8fea2 | 330 | |
3e34819e SE |
331 | batadv_info(hard_iface->soft_iface, "Interface deactivated: %s\n", |
332 | hard_iface->net_dev->name); | |
c6c8fea2 | 333 | |
9563877e | 334 | batadv_update_min_mtu(hard_iface->soft_iface); |
c6c8fea2 SE |
335 | } |
336 | ||
cb4b0d48 AQ |
337 | /** |
338 | * batadv_master_del_slave - remove hard_iface from the current master interface | |
339 | * @slave: the interface enslaved in another master | |
340 | * @master: the master from which slave has to be removed | |
341 | * | |
342 | * Invoke ndo_del_slave on master passing slave as argument. In this way slave | |
343 | * is free'd and master can correctly change its internal state. | |
344 | * Return 0 on success, a negative value representing the error otherwise | |
345 | */ | |
346 | static int batadv_master_del_slave(struct batadv_hard_iface *slave, | |
347 | struct net_device *master) | |
348 | { | |
349 | int ret; | |
350 | ||
351 | if (!master) | |
352 | return 0; | |
353 | ||
354 | ret = -EBUSY; | |
355 | if (master->netdev_ops->ndo_del_slave) | |
356 | ret = master->netdev_ops->ndo_del_slave(master, slave->net_dev); | |
357 | ||
358 | return ret; | |
359 | } | |
360 | ||
56303d34 | 361 | int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, |
9563877e | 362 | const char *iface_name) |
c6c8fea2 | 363 | { |
56303d34 | 364 | struct batadv_priv *bat_priv; |
cb4b0d48 | 365 | struct net_device *soft_iface, *master; |
293e9338 | 366 | __be16 ethertype = htons(ETH_P_BATMAN); |
411d6ed9 | 367 | int max_header_len = batadv_max_header_len(); |
e44d8fe2 | 368 | int ret; |
c6c8fea2 | 369 | |
e9a4f295 | 370 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
371 | goto out; |
372 | ||
e6c10f43 | 373 | if (!atomic_inc_not_zero(&hard_iface->refcount)) |
ed75ccbe ML |
374 | goto out; |
375 | ||
e44d8fe2 | 376 | soft_iface = dev_get_by_name(&init_net, iface_name); |
c6c8fea2 | 377 | |
e44d8fe2 | 378 | if (!soft_iface) { |
04b482a2 | 379 | soft_iface = batadv_softif_create(iface_name); |
c6c8fea2 | 380 | |
e44d8fe2 SE |
381 | if (!soft_iface) { |
382 | ret = -ENOMEM; | |
c6c8fea2 | 383 | goto err; |
e44d8fe2 | 384 | } |
c6c8fea2 SE |
385 | |
386 | /* dev_get_by_name() increases the reference counter for us */ | |
e44d8fe2 SE |
387 | dev_hold(soft_iface); |
388 | } | |
389 | ||
04b482a2 | 390 | if (!batadv_softif_is_valid(soft_iface)) { |
86ceb360 | 391 | pr_err("Can't create batman mesh interface %s: already exists as regular interface\n", |
e44d8fe2 | 392 | soft_iface->name); |
e44d8fe2 | 393 | ret = -EINVAL; |
77af7575 | 394 | goto err_dev; |
c6c8fea2 SE |
395 | } |
396 | ||
cb4b0d48 AQ |
397 | /* check if the interface is enslaved in another virtual one and |
398 | * in that case unlink it first | |
399 | */ | |
400 | master = netdev_master_upper_dev_get(hard_iface->net_dev); | |
401 | ret = batadv_master_del_slave(hard_iface, master); | |
402 | if (ret) | |
403 | goto err_dev; | |
404 | ||
e44d8fe2 | 405 | hard_iface->soft_iface = soft_iface; |
e6c10f43 | 406 | bat_priv = netdev_priv(hard_iface->soft_iface); |
d0b9fd89 | 407 | |
3dbd550b SE |
408 | ret = netdev_master_upper_dev_link(hard_iface->net_dev, soft_iface); |
409 | if (ret) | |
410 | goto err_dev; | |
411 | ||
77af7575 | 412 | ret = bat_priv->bat_algo_ops->bat_iface_enable(hard_iface); |
5346c35e | 413 | if (ret < 0) |
3dbd550b | 414 | goto err_upper; |
c6c8fea2 | 415 | |
e6c10f43 | 416 | hard_iface->if_num = bat_priv->num_ifaces; |
c6c8fea2 | 417 | bat_priv->num_ifaces++; |
e9a4f295 | 418 | hard_iface->if_status = BATADV_IF_INACTIVE; |
62446307 SW |
419 | ret = batadv_orig_hash_add_if(hard_iface, bat_priv->num_ifaces); |
420 | if (ret < 0) { | |
421 | bat_priv->bat_algo_ops->bat_iface_disable(hard_iface); | |
422 | bat_priv->num_ifaces--; | |
423 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; | |
3dbd550b | 424 | goto err_upper; |
62446307 | 425 | } |
c6c8fea2 | 426 | |
7e071c79 | 427 | hard_iface->batman_adv_ptype.type = ethertype; |
3193e8fd | 428 | hard_iface->batman_adv_ptype.func = batadv_batman_skb_recv; |
e6c10f43 ML |
429 | hard_iface->batman_adv_ptype.dev = hard_iface->net_dev; |
430 | dev_add_pack(&hard_iface->batman_adv_ptype); | |
c6c8fea2 | 431 | |
3e34819e SE |
432 | batadv_info(hard_iface->soft_iface, "Adding interface: %s\n", |
433 | hard_iface->net_dev->name); | |
c6c8fea2 | 434 | |
0aca2369 | 435 | if (atomic_read(&bat_priv->fragmentation) && |
411d6ed9 | 436 | hard_iface->net_dev->mtu < ETH_DATA_LEN + max_header_len) |
3e34819e | 437 | batadv_info(hard_iface->soft_iface, |
411d6ed9 | 438 | "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 | 439 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
411d6ed9 | 440 | ETH_DATA_LEN + max_header_len); |
c6c8fea2 | 441 | |
0aca2369 | 442 | if (!atomic_read(&bat_priv->fragmentation) && |
411d6ed9 | 443 | hard_iface->net_dev->mtu < ETH_DATA_LEN + max_header_len) |
3e34819e | 444 | batadv_info(hard_iface->soft_iface, |
411d6ed9 | 445 | "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 | 446 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
411d6ed9 | 447 | ETH_DATA_LEN + max_header_len); |
c6c8fea2 | 448 | |
18a1cb6e SE |
449 | if (batadv_hardif_is_iface_up(hard_iface)) |
450 | batadv_hardif_activate_interface(hard_iface); | |
c6c8fea2 | 451 | else |
3e34819e SE |
452 | batadv_err(hard_iface->soft_iface, |
453 | "Not using interface %s (retrying later): interface not active\n", | |
454 | hard_iface->net_dev->name); | |
c6c8fea2 SE |
455 | |
456 | /* begin scheduling originator messages on that interface */ | |
9455e34c | 457 | batadv_schedule_bat_ogm(hard_iface); |
c6c8fea2 SE |
458 | |
459 | out: | |
460 | return 0; | |
461 | ||
3dbd550b SE |
462 | err_upper: |
463 | netdev_upper_dev_unlink(hard_iface->net_dev, soft_iface); | |
77af7575 | 464 | err_dev: |
3dbd550b | 465 | hard_iface->soft_iface = NULL; |
77af7575 | 466 | dev_put(soft_iface); |
c6c8fea2 | 467 | err: |
e5d89254 | 468 | batadv_hardif_free_ref(hard_iface); |
e44d8fe2 | 469 | return ret; |
c6c8fea2 SE |
470 | } |
471 | ||
a15fd361 SE |
472 | void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface, |
473 | enum batadv_hard_if_cleanup autodel) | |
c6c8fea2 | 474 | { |
56303d34 SE |
475 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
476 | struct batadv_hard_iface *primary_if = NULL; | |
c6c8fea2 | 477 | |
e9a4f295 | 478 | if (hard_iface->if_status == BATADV_IF_ACTIVE) |
18a1cb6e | 479 | batadv_hardif_deactivate_interface(hard_iface); |
c6c8fea2 | 480 | |
e9a4f295 | 481 | if (hard_iface->if_status != BATADV_IF_INACTIVE) |
32ae9b22 | 482 | goto out; |
c6c8fea2 | 483 | |
3e34819e SE |
484 | batadv_info(hard_iface->soft_iface, "Removing interface: %s\n", |
485 | hard_iface->net_dev->name); | |
e6c10f43 | 486 | dev_remove_pack(&hard_iface->batman_adv_ptype); |
c6c8fea2 SE |
487 | |
488 | bat_priv->num_ifaces--; | |
7d211efc | 489 | batadv_orig_hash_del_if(hard_iface, bat_priv->num_ifaces); |
c6c8fea2 | 490 | |
e5d89254 | 491 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 492 | if (hard_iface == primary_if) { |
56303d34 | 493 | struct batadv_hard_iface *new_if; |
c6c8fea2 | 494 | |
18a1cb6e SE |
495 | new_if = batadv_hardif_get_active(hard_iface->soft_iface); |
496 | batadv_primary_if_select(bat_priv, new_if); | |
c6c8fea2 SE |
497 | |
498 | if (new_if) | |
e5d89254 | 499 | batadv_hardif_free_ref(new_if); |
c6c8fea2 SE |
500 | } |
501 | ||
00a50076 | 502 | bat_priv->bat_algo_ops->bat_iface_disable(hard_iface); |
e9a4f295 | 503 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; |
c6c8fea2 | 504 | |
e6c10f43 | 505 | /* delete all references to this hard_iface */ |
7d211efc | 506 | batadv_purge_orig_ref(bat_priv); |
9455e34c | 507 | batadv_purge_outstanding_packets(bat_priv, hard_iface); |
e6c10f43 | 508 | dev_put(hard_iface->soft_iface); |
c6c8fea2 SE |
509 | |
510 | /* nobody uses this interface anymore */ | |
8257f55a AQ |
511 | if (!bat_priv->num_ifaces) { |
512 | batadv_gw_check_client_stop(bat_priv); | |
513 | ||
514 | if (autodel == BATADV_IF_CLEANUP_AUTO) | |
515 | batadv_softif_destroy_sysfs(hard_iface->soft_iface); | |
516 | } | |
c6c8fea2 | 517 | |
3dbd550b | 518 | netdev_upper_dev_unlink(hard_iface->net_dev, hard_iface->soft_iface); |
e6c10f43 | 519 | hard_iface->soft_iface = NULL; |
e5d89254 | 520 | batadv_hardif_free_ref(hard_iface); |
32ae9b22 ML |
521 | |
522 | out: | |
523 | if (primary_if) | |
e5d89254 | 524 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
525 | } |
526 | ||
5bc44dc8 SW |
527 | /** |
528 | * batadv_hardif_remove_interface_finish - cleans up the remains of a hardif | |
529 | * @work: work queue item | |
530 | * | |
531 | * Free the parts of the hard interface which can not be removed under | |
532 | * rtnl lock (to prevent deadlock situations). | |
533 | */ | |
534 | static void batadv_hardif_remove_interface_finish(struct work_struct *work) | |
535 | { | |
536 | struct batadv_hard_iface *hard_iface; | |
537 | ||
538 | hard_iface = container_of(work, struct batadv_hard_iface, | |
539 | cleanup_work); | |
540 | ||
5bc7c1eb | 541 | batadv_debugfs_del_hardif(hard_iface); |
5bc44dc8 SW |
542 | batadv_sysfs_del_hardif(&hard_iface->hardif_obj); |
543 | batadv_hardif_free_ref(hard_iface); | |
544 | } | |
545 | ||
56303d34 | 546 | static struct batadv_hard_iface * |
18a1cb6e | 547 | batadv_hardif_add_interface(struct net_device *net_dev) |
c6c8fea2 | 548 | { |
56303d34 | 549 | struct batadv_hard_iface *hard_iface; |
c6c8fea2 SE |
550 | int ret; |
551 | ||
c3caf519 SE |
552 | ASSERT_RTNL(); |
553 | ||
18a1cb6e | 554 | ret = batadv_is_valid_iface(net_dev); |
c6c8fea2 SE |
555 | if (ret != 1) |
556 | goto out; | |
557 | ||
558 | dev_hold(net_dev); | |
559 | ||
7db3fc29 | 560 | hard_iface = kzalloc(sizeof(*hard_iface), GFP_ATOMIC); |
320f422f | 561 | if (!hard_iface) |
c6c8fea2 | 562 | goto release_dev; |
c6c8fea2 | 563 | |
5853e22c | 564 | ret = batadv_sysfs_add_hardif(&hard_iface->hardif_obj, net_dev); |
c6c8fea2 SE |
565 | if (ret) |
566 | goto free_if; | |
567 | ||
e6c10f43 ML |
568 | hard_iface->if_num = -1; |
569 | hard_iface->net_dev = net_dev; | |
570 | hard_iface->soft_iface = NULL; | |
e9a4f295 | 571 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; |
5bc7c1eb SW |
572 | |
573 | ret = batadv_debugfs_add_hardif(hard_iface); | |
574 | if (ret) | |
575 | goto free_sysfs; | |
576 | ||
e6c10f43 | 577 | INIT_LIST_HEAD(&hard_iface->list); |
5bc44dc8 SW |
578 | INIT_WORK(&hard_iface->cleanup_work, |
579 | batadv_hardif_remove_interface_finish); | |
580 | ||
caf65bfc MS |
581 | hard_iface->num_bcasts = BATADV_NUM_BCASTS_DEFAULT; |
582 | if (batadv_is_wifi_netdev(net_dev)) | |
583 | hard_iface->num_bcasts = BATADV_NUM_BCASTS_WIRELESS; | |
584 | ||
ed75ccbe | 585 | /* extra reference for return */ |
e6c10f43 | 586 | atomic_set(&hard_iface->refcount, 2); |
c6c8fea2 | 587 | |
18a1cb6e | 588 | batadv_check_known_mac_addr(hard_iface->net_dev); |
3193e8fd | 589 | list_add_tail_rcu(&hard_iface->list, &batadv_hardif_list); |
c6c8fea2 | 590 | |
e6c10f43 | 591 | return hard_iface; |
c6c8fea2 | 592 | |
5bc7c1eb SW |
593 | free_sysfs: |
594 | batadv_sysfs_del_hardif(&hard_iface->hardif_obj); | |
c6c8fea2 | 595 | free_if: |
e6c10f43 | 596 | kfree(hard_iface); |
c6c8fea2 SE |
597 | release_dev: |
598 | dev_put(net_dev); | |
599 | out: | |
600 | return NULL; | |
601 | } | |
602 | ||
56303d34 | 603 | static void batadv_hardif_remove_interface(struct batadv_hard_iface *hard_iface) |
c6c8fea2 | 604 | { |
c3caf519 SE |
605 | ASSERT_RTNL(); |
606 | ||
c6c8fea2 | 607 | /* first deactivate interface */ |
e9a4f295 | 608 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
a15fd361 SE |
609 | batadv_hardif_disable_interface(hard_iface, |
610 | BATADV_IF_CLEANUP_AUTO); | |
c6c8fea2 | 611 | |
e9a4f295 | 612 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
613 | return; |
614 | ||
e9a4f295 | 615 | hard_iface->if_status = BATADV_IF_TO_BE_REMOVED; |
5bc44dc8 | 616 | queue_work(batadv_event_workqueue, &hard_iface->cleanup_work); |
c6c8fea2 SE |
617 | } |
618 | ||
9563877e | 619 | void batadv_hardif_remove_interfaces(void) |
c6c8fea2 | 620 | { |
56303d34 | 621 | struct batadv_hard_iface *hard_iface, *hard_iface_tmp; |
c6c8fea2 | 622 | |
c3caf519 | 623 | rtnl_lock(); |
e6c10f43 | 624 | list_for_each_entry_safe(hard_iface, hard_iface_tmp, |
3193e8fd | 625 | &batadv_hardif_list, list) { |
e6c10f43 | 626 | list_del_rcu(&hard_iface->list); |
18a1cb6e | 627 | batadv_hardif_remove_interface(hard_iface); |
c6c8fea2 SE |
628 | } |
629 | rtnl_unlock(); | |
630 | } | |
631 | ||
18a1cb6e SE |
632 | static int batadv_hard_if_event(struct notifier_block *this, |
633 | unsigned long event, void *ptr) | |
c6c8fea2 | 634 | { |
351638e7 | 635 | struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); |
56303d34 SE |
636 | struct batadv_hard_iface *hard_iface; |
637 | struct batadv_hard_iface *primary_if = NULL; | |
638 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 639 | |
37130293 SE |
640 | if (batadv_softif_is_valid(net_dev) && event == NETDEV_REGISTER) { |
641 | batadv_sysfs_add_meshif(net_dev); | |
5d2c05b2 AQ |
642 | bat_priv = netdev_priv(net_dev); |
643 | batadv_softif_create_vlan(bat_priv, BATADV_NO_FLAGS); | |
37130293 SE |
644 | return NOTIFY_DONE; |
645 | } | |
646 | ||
56303d34 | 647 | hard_iface = batadv_hardif_get_by_netdev(net_dev); |
e6c10f43 | 648 | if (!hard_iface && event == NETDEV_REGISTER) |
18a1cb6e | 649 | hard_iface = batadv_hardif_add_interface(net_dev); |
c6c8fea2 | 650 | |
e6c10f43 | 651 | if (!hard_iface) |
c6c8fea2 SE |
652 | goto out; |
653 | ||
654 | switch (event) { | |
655 | case NETDEV_UP: | |
18a1cb6e | 656 | batadv_hardif_activate_interface(hard_iface); |
c6c8fea2 SE |
657 | break; |
658 | case NETDEV_GOING_DOWN: | |
659 | case NETDEV_DOWN: | |
18a1cb6e | 660 | batadv_hardif_deactivate_interface(hard_iface); |
c6c8fea2 SE |
661 | break; |
662 | case NETDEV_UNREGISTER: | |
e6c10f43 | 663 | list_del_rcu(&hard_iface->list); |
c6c8fea2 | 664 | |
18a1cb6e | 665 | batadv_hardif_remove_interface(hard_iface); |
c6c8fea2 SE |
666 | break; |
667 | case NETDEV_CHANGEMTU: | |
e6c10f43 | 668 | if (hard_iface->soft_iface) |
9563877e | 669 | batadv_update_min_mtu(hard_iface->soft_iface); |
c6c8fea2 SE |
670 | break; |
671 | case NETDEV_CHANGEADDR: | |
e9a4f295 | 672 | if (hard_iface->if_status == BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
673 | goto hardif_put; |
674 | ||
18a1cb6e | 675 | batadv_check_known_mac_addr(hard_iface->net_dev); |
c6c8fea2 | 676 | |
e6c10f43 | 677 | bat_priv = netdev_priv(hard_iface->soft_iface); |
c3229398 | 678 | bat_priv->bat_algo_ops->bat_iface_update_mac(hard_iface); |
01c4224b | 679 | |
e5d89254 | 680 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 ML |
681 | if (!primary_if) |
682 | goto hardif_put; | |
683 | ||
684 | if (hard_iface == primary_if) | |
18a1cb6e | 685 | batadv_primary_if_update_addr(bat_priv, NULL); |
c6c8fea2 SE |
686 | break; |
687 | default: | |
688 | break; | |
f81c6224 | 689 | } |
c6c8fea2 SE |
690 | |
691 | hardif_put: | |
e5d89254 | 692 | batadv_hardif_free_ref(hard_iface); |
c6c8fea2 | 693 | out: |
32ae9b22 | 694 | if (primary_if) |
e5d89254 | 695 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
696 | return NOTIFY_DONE; |
697 | } | |
698 | ||
9563877e | 699 | struct notifier_block batadv_hard_if_notifier = { |
18a1cb6e | 700 | .notifier_call = batadv_hard_if_event, |
c6c8fea2 | 701 | }; |