blob: 01acccc4d2185806ae6dd37b2f0f091d9a0b92a0 [file] [log] [blame]
Sven Eckelmann9f6446c2015-04-23 13:16:35 +02001/* Copyright (C) 2007-2015 B.A.T.M.A.N. contributors:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +00002 *
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
Antonio Quartulliebf38fb2013-11-03 20:40:48 +010015 * along with this program; if not, see <http://www.gnu.org/licenses/>.
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000016 */
17
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000018#include "hard-interface.h"
Sven Eckelmann1e2c2a42015-04-17 19:40:28 +020019#include "main.h"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000020
Sven Eckelmann1e2c2a42015-04-17 19:40:28 +020021#include <linux/bug.h>
22#include <linux/byteorder/generic.h>
23#include <linux/errno.h>
24#include <linux/fs.h>
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000025#include <linux/if_arp.h>
Antonio Quartulliaf5d4f72012-11-26 00:38:50 +010026#include <linux/if_ether.h>
Sven Eckelmann1e2c2a42015-04-17 19:40:28 +020027#include <linux/if.h>
28#include <linux/kernel.h>
29#include <linux/list.h>
30#include <linux/netdevice.h>
31#include <linux/printk.h>
32#include <linux/rculist.h>
33#include <linux/rtnetlink.h>
34#include <linux/slab.h>
Marek Lindnercef63412015-08-04 21:09:55 +080035#include <linux/spinlock.h>
Sven Eckelmann1e2c2a42015-04-17 19:40:28 +020036#include <linux/workqueue.h>
37#include <net/net_namespace.h>
38
39#include "bridge_loop_avoidance.h"
40#include "debugfs.h"
41#include "distributed-arp-table.h"
42#include "gateway_client.h"
43#include "originator.h"
44#include "packet.h"
45#include "send.h"
46#include "soft-interface.h"
47#include "sysfs.h"
48#include "translation-table.h"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000049
Sven Eckelmann95638772012-05-12 02:09:31 +020050void batadv_hardif_free_rcu(struct rcu_head *rcu)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000051{
Sven Eckelmann56303d32012-06-05 22:31:31 +020052 struct batadv_hard_iface *hard_iface;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000053
Sven Eckelmann56303d32012-06-05 22:31:31 +020054 hard_iface = container_of(rcu, struct batadv_hard_iface, rcu);
Marek Lindnere6c10f42011-02-18 12:33:20 +000055 dev_put(hard_iface->net_dev);
56 kfree(hard_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000057}
58
Sven Eckelmann56303d32012-06-05 22:31:31 +020059struct batadv_hard_iface *
60batadv_hardif_get_by_netdev(const struct net_device *net_dev)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000061{
Sven Eckelmann56303d32012-06-05 22:31:31 +020062 struct batadv_hard_iface *hard_iface;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000063
64 rcu_read_lock();
Sven Eckelmann3193e8f2012-05-12 02:09:42 +020065 list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
Marek Lindnere6c10f42011-02-18 12:33:20 +000066 if (hard_iface->net_dev == net_dev &&
67 atomic_inc_not_zero(&hard_iface->refcount))
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000068 goto out;
69 }
70
Marek Lindnere6c10f42011-02-18 12:33:20 +000071 hard_iface = NULL;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000072
73out:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000074 rcu_read_unlock();
Marek Lindnere6c10f42011-02-18 12:33:20 +000075 return hard_iface;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000076}
77
Antonio Quartullib7eddd02012-09-09 10:46:46 +020078/**
79 * batadv_is_on_batman_iface - check if a device is a batman iface descendant
80 * @net_dev: the device to check
81 *
82 * If the user creates any virtual device on top of a batman-adv interface, it
83 * is important to prevent this new interface to be used to create a new mesh
84 * network (this behaviour would lead to a batman-over-batman configuration).
85 * This function recursively checks all the fathers of the device passed as
86 * argument looking for a batman-adv soft interface.
87 *
88 * Returns true if the device is descendant of a batman-adv mesh interface (or
89 * if it is a batman-adv interface itself), false otherwise
90 */
91static bool batadv_is_on_batman_iface(const struct net_device *net_dev)
92{
93 struct net_device *parent_dev;
94 bool ret;
95
96 /* check if this is a batman-adv mesh interface */
97 if (batadv_softif_is_valid(net_dev))
98 return true;
99
100 /* no more parents..stop recursion */
Nicolas Dichtela54acb32015-04-02 17:07:00 +0200101 if (dev_get_iflink(net_dev) == 0 ||
102 dev_get_iflink(net_dev) == net_dev->ifindex)
Antonio Quartullib7eddd02012-09-09 10:46:46 +0200103 return false;
104
105 /* recurse over the parent device */
Nicolas Dichtela54acb32015-04-02 17:07:00 +0200106 parent_dev = __dev_get_by_index(&init_net, dev_get_iflink(net_dev));
Antonio Quartullib7eddd02012-09-09 10:46:46 +0200107 /* if we got a NULL parent_dev there is something broken.. */
108 if (WARN(!parent_dev, "Cannot find parent device"))
109 return false;
110
111 ret = batadv_is_on_batman_iface(parent_dev);
112
Antonio Quartullib7eddd02012-09-09 10:46:46 +0200113 return ret;
114}
115
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200116static int batadv_is_valid_iface(const struct net_device *net_dev)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000117{
118 if (net_dev->flags & IFF_LOOPBACK)
119 return 0;
120
121 if (net_dev->type != ARPHRD_ETHER)
122 return 0;
123
124 if (net_dev->addr_len != ETH_ALEN)
125 return 0;
126
127 /* no batman over batman */
Antonio Quartullib7eddd02012-09-09 10:46:46 +0200128 if (batadv_is_on_batman_iface(net_dev))
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000129 return 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000130
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000131 return 1;
132}
133
Matthias Schifferde68d102013-03-09 23:14:22 +0100134/**
135 * batadv_is_wifi_netdev - check if the given net_device struct is a wifi
136 * interface
137 * @net_device: the device to check
138 *
139 * Returns true if the net device is a 802.11 wireless device, false otherwise.
140 */
Antonio Quartulli0c69aec2013-10-13 02:50:18 +0200141bool batadv_is_wifi_netdev(struct net_device *net_device)
Matthias Schifferde68d102013-03-09 23:14:22 +0100142{
Antonio Quartulli0c69aec2013-10-13 02:50:18 +0200143 if (!net_device)
144 return false;
145
Matthias Schifferde68d102013-03-09 23:14:22 +0100146#ifdef CONFIG_WIRELESS_EXT
147 /* pre-cfg80211 drivers have to implement WEXT, so it is possible to
148 * check for wireless_handlers != NULL
149 */
150 if (net_device->wireless_handlers)
151 return true;
152#endif
153
154 /* cfg80211 drivers have to set ieee80211_ptr */
155 if (net_device->ieee80211_ptr)
156 return true;
157
158 return false;
159}
160
Sven Eckelmann56303d32012-06-05 22:31:31 +0200161static struct batadv_hard_iface *
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200162batadv_hardif_get_active(const struct net_device *soft_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000163{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200164 struct batadv_hard_iface *hard_iface;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000165
166 rcu_read_lock();
Sven Eckelmann3193e8f2012-05-12 02:09:42 +0200167 list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
Marek Lindnere6c10f42011-02-18 12:33:20 +0000168 if (hard_iface->soft_iface != soft_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000169 continue;
170
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200171 if (hard_iface->if_status == BATADV_IF_ACTIVE &&
Marek Lindnere6c10f42011-02-18 12:33:20 +0000172 atomic_inc_not_zero(&hard_iface->refcount))
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000173 goto out;
174 }
175
Marek Lindnere6c10f42011-02-18 12:33:20 +0000176 hard_iface = NULL;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000177
178out:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000179 rcu_read_unlock();
Marek Lindnere6c10f42011-02-18 12:33:20 +0000180 return hard_iface;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000181}
182
Sven Eckelmann56303d32012-06-05 22:31:31 +0200183static void batadv_primary_if_update_addr(struct batadv_priv *bat_priv,
184 struct batadv_hard_iface *oldif)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000185{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200186 struct batadv_hard_iface *primary_if;
Marek Lindner32ae9b22011-04-20 15:40:58 +0200187
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200188 primary_if = batadv_primary_if_get_selected(bat_priv);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200189 if (!primary_if)
190 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000191
Antonio Quartulli785ea112011-11-23 11:35:44 +0100192 batadv_dat_init_own_addr(bat_priv, primary_if);
Sven Eckelmann08adf152012-05-12 13:38:47 +0200193 batadv_bla_update_orig_address(bat_priv, primary_if, oldif);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200194out:
195 if (primary_if)
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200196 batadv_hardif_free_ref(primary_if);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000197}
198
Sven Eckelmann56303d32012-06-05 22:31:31 +0200199static void batadv_primary_if_select(struct batadv_priv *bat_priv,
200 struct batadv_hard_iface *new_hard_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000201{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200202 struct batadv_hard_iface *curr_hard_iface;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000203
Sven Eckelmannc3caf512011-05-03 11:51:38 +0200204 ASSERT_RTNL();
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000205
Marek Lindner32ae9b22011-04-20 15:40:58 +0200206 if (new_hard_iface && !atomic_inc_not_zero(&new_hard_iface->refcount))
207 new_hard_iface = NULL;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000208
Sven Eckelmann728cbc62011-05-15 00:50:21 +0200209 curr_hard_iface = rcu_dereference_protected(bat_priv->primary_if, 1);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200210 rcu_assign_pointer(bat_priv->primary_if, new_hard_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000211
Marek Lindner32ae9b22011-04-20 15:40:58 +0200212 if (!new_hard_iface)
Simon Wunderlich23721382012-01-22 20:00:19 +0100213 goto out;
Marek Lindner32ae9b22011-04-20 15:40:58 +0200214
Marek Lindnercd8b78e2012-02-07 17:20:49 +0800215 bat_priv->bat_algo_ops->bat_primary_iface_set(new_hard_iface);
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200216 batadv_primary_if_update_addr(bat_priv, curr_hard_iface);
Simon Wunderlich23721382012-01-22 20:00:19 +0100217
218out:
219 if (curr_hard_iface)
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200220 batadv_hardif_free_ref(curr_hard_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000221}
222
Sven Eckelmann56303d32012-06-05 22:31:31 +0200223static bool
224batadv_hardif_is_iface_up(const struct batadv_hard_iface *hard_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000225{
Marek Lindnere6c10f42011-02-18 12:33:20 +0000226 if (hard_iface->net_dev->flags & IFF_UP)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000227 return true;
228
229 return false;
230}
231
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200232static void batadv_check_known_mac_addr(const struct net_device *net_dev)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000233{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200234 const struct batadv_hard_iface *hard_iface;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000235
236 rcu_read_lock();
Sven Eckelmann3193e8f2012-05-12 02:09:42 +0200237 list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200238 if ((hard_iface->if_status != BATADV_IF_ACTIVE) &&
239 (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED))
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000240 continue;
241
Marek Lindnere6c10f42011-02-18 12:33:20 +0000242 if (hard_iface->net_dev == net_dev)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000243 continue;
244
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200245 if (!batadv_compare_eth(hard_iface->net_dev->dev_addr,
246 net_dev->dev_addr))
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000247 continue;
248
Sven Eckelmann67969582012-03-26 16:22:45 +0200249 pr_warn("The newly added mac address (%pM) already exists on: %s\n",
250 net_dev->dev_addr, hard_iface->net_dev->name);
251 pr_warn("It is strongly recommended to keep mac addresses unique to avoid problems!\n");
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000252 }
253 rcu_read_unlock();
254}
255
Sven Eckelmann7bca68c2015-08-07 19:28:42 +0200256/**
257 * batadv_hardif_recalc_extra_skbroom() - Recalculate skbuff extra head/tailroom
258 * @soft_iface: netdev struct of the mesh interface
259 */
260static void batadv_hardif_recalc_extra_skbroom(struct net_device *soft_iface)
261{
262 const struct batadv_hard_iface *hard_iface;
263 unsigned short lower_header_len = ETH_HLEN;
264 unsigned short lower_headroom = 0;
265 unsigned short lower_tailroom = 0;
266 unsigned short needed_headroom;
267
268 rcu_read_lock();
269 list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
270 if (hard_iface->if_status == BATADV_IF_NOT_IN_USE)
271 continue;
272
273 if (hard_iface->soft_iface != soft_iface)
274 continue;
275
276 lower_header_len = max_t(unsigned short, lower_header_len,
277 hard_iface->net_dev->hard_header_len);
278
279 lower_headroom = max_t(unsigned short, lower_headroom,
280 hard_iface->net_dev->needed_headroom);
281
282 lower_tailroom = max_t(unsigned short, lower_tailroom,
283 hard_iface->net_dev->needed_tailroom);
284 }
285 rcu_read_unlock();
286
287 needed_headroom = lower_headroom + (lower_header_len - ETH_HLEN);
288 needed_headroom += batadv_max_header_len();
289
290 soft_iface->needed_headroom = needed_headroom;
291 soft_iface->needed_tailroom = lower_tailroom;
292}
293
Sven Eckelmann95638772012-05-12 02:09:31 +0200294int batadv_hardif_min_mtu(struct net_device *soft_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000295{
Marek Lindnera19d3d82013-05-27 15:33:25 +0800296 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
Sven Eckelmann56303d32012-06-05 22:31:31 +0200297 const struct batadv_hard_iface *hard_iface;
Antonio Quartulli930cd6e2014-01-21 11:22:05 +0100298 int min_mtu = INT_MAX;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000299
300 rcu_read_lock();
Sven Eckelmann3193e8f2012-05-12 02:09:42 +0200301 list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200302 if ((hard_iface->if_status != BATADV_IF_ACTIVE) &&
303 (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED))
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000304 continue;
305
Marek Lindnere6c10f42011-02-18 12:33:20 +0000306 if (hard_iface->soft_iface != soft_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000307 continue;
308
Marek Lindnera19d3d82013-05-27 15:33:25 +0800309 min_mtu = min_t(int, hard_iface->net_dev->mtu, min_mtu);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000310 }
311 rcu_read_unlock();
Marek Lindnera19d3d82013-05-27 15:33:25 +0800312
Marek Lindnera19d3d82013-05-27 15:33:25 +0800313 if (atomic_read(&bat_priv->fragmentation) == 0)
314 goto out;
315
316 /* with fragmentation enabled the maximum size of internally generated
317 * packets such as translation table exchanges or tvlv containers, etc
318 * has to be calculated
319 */
320 min_mtu = min_t(int, min_mtu, BATADV_FRAG_MAX_FRAG_SIZE);
321 min_mtu -= sizeof(struct batadv_frag_packet);
322 min_mtu *= BATADV_FRAG_MAX_FRAGMENTS;
Marek Lindnera19d3d82013-05-27 15:33:25 +0800323
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000324out:
Antonio Quartulli930cd6e2014-01-21 11:22:05 +0100325 /* report to the other components the maximum amount of bytes that
326 * batman-adv can send over the wire (without considering the payload
327 * overhead). For example, this value is used by TT to compute the
328 * maximum local table table size
329 */
330 atomic_set(&bat_priv->packet_size_max, min_mtu);
331
332 /* the real soft-interface MTU is computed by removing the payload
333 * overhead from the maximum amount of bytes that was just computed.
334 *
335 * However batman-adv does not support MTUs bigger than ETH_DATA_LEN
336 */
337 return min_t(int, min_mtu - batadv_max_header_len(), ETH_DATA_LEN);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000338}
339
340/* adjusts the MTU if a new interface with a smaller MTU appeared. */
Sven Eckelmann95638772012-05-12 02:09:31 +0200341void batadv_update_min_mtu(struct net_device *soft_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000342{
Marek Lindnera19d3d82013-05-27 15:33:25 +0800343 soft_iface->mtu = batadv_hardif_min_mtu(soft_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000344
Marek Lindnera19d3d82013-05-27 15:33:25 +0800345 /* Check if the local translate table should be cleaned up to match a
346 * new (and smaller) MTU.
347 */
348 batadv_tt_local_resize_to_mtu(soft_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000349}
350
Sven Eckelmann56303d32012-06-05 22:31:31 +0200351static void
352batadv_hardif_activate_interface(struct batadv_hard_iface *hard_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000353{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200354 struct batadv_priv *bat_priv;
355 struct batadv_hard_iface *primary_if = NULL;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000356
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200357 if (hard_iface->if_status != BATADV_IF_INACTIVE)
Marek Lindner32ae9b22011-04-20 15:40:58 +0200358 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000359
Marek Lindnere6c10f42011-02-18 12:33:20 +0000360 bat_priv = netdev_priv(hard_iface->soft_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000361
Marek Lindnerc3229392012-03-11 06:17:50 +0800362 bat_priv->bat_algo_ops->bat_iface_update_mac(hard_iface);
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200363 hard_iface->if_status = BATADV_IF_TO_BE_ACTIVATED;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000364
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200365 /* the first active interface becomes our primary interface or
Antonio Quartulli015758d2011-07-09 17:52:13 +0200366 * the next active interface after the old primary interface was removed
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000367 */
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200368 primary_if = batadv_primary_if_get_selected(bat_priv);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200369 if (!primary_if)
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200370 batadv_primary_if_select(bat_priv, hard_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000371
Sven Eckelmann3e348192012-05-16 20:23:22 +0200372 batadv_info(hard_iface->soft_iface, "Interface activated: %s\n",
373 hard_iface->net_dev->name);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000374
Sven Eckelmann95638772012-05-12 02:09:31 +0200375 batadv_update_min_mtu(hard_iface->soft_iface);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200376
377out:
378 if (primary_if)
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200379 batadv_hardif_free_ref(primary_if);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000380}
381
Sven Eckelmann56303d32012-06-05 22:31:31 +0200382static void
383batadv_hardif_deactivate_interface(struct batadv_hard_iface *hard_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000384{
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200385 if ((hard_iface->if_status != BATADV_IF_ACTIVE) &&
386 (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED))
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000387 return;
388
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200389 hard_iface->if_status = BATADV_IF_INACTIVE;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000390
Sven Eckelmann3e348192012-05-16 20:23:22 +0200391 batadv_info(hard_iface->soft_iface, "Interface deactivated: %s\n",
392 hard_iface->net_dev->name);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000393
Sven Eckelmann95638772012-05-12 02:09:31 +0200394 batadv_update_min_mtu(hard_iface->soft_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000395}
396
Antonio Quartullicb4b0d42013-02-16 14:42:39 +0100397/**
398 * batadv_master_del_slave - remove hard_iface from the current master interface
399 * @slave: the interface enslaved in another master
400 * @master: the master from which slave has to be removed
401 *
402 * Invoke ndo_del_slave on master passing slave as argument. In this way slave
403 * is free'd and master can correctly change its internal state.
404 * Return 0 on success, a negative value representing the error otherwise
405 */
406static int batadv_master_del_slave(struct batadv_hard_iface *slave,
407 struct net_device *master)
408{
409 int ret;
410
411 if (!master)
412 return 0;
413
414 ret = -EBUSY;
415 if (master->netdev_ops->ndo_del_slave)
416 ret = master->netdev_ops->ndo_del_slave(master, slave->net_dev);
417
418 return ret;
419}
420
Sven Eckelmann56303d32012-06-05 22:31:31 +0200421int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
Sven Eckelmann95638772012-05-12 02:09:31 +0200422 const char *iface_name)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000423{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200424 struct batadv_priv *bat_priv;
Antonio Quartullicb4b0d42013-02-16 14:42:39 +0100425 struct net_device *soft_iface, *master;
Antonio Quartulli293e9332013-05-19 12:55:16 +0200426 __be16 ethertype = htons(ETH_P_BATMAN);
Marek Lindner411d6ed2013-05-08 13:31:59 +0800427 int max_header_len = batadv_max_header_len();
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000428 int ret;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000429
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200430 if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000431 goto out;
432
Marek Lindnere6c10f42011-02-18 12:33:20 +0000433 if (!atomic_inc_not_zero(&hard_iface->refcount))
Marek Lindnered75ccb2011-02-10 14:33:51 +0000434 goto out;
435
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000436 soft_iface = dev_get_by_name(&init_net, iface_name);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000437
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000438 if (!soft_iface) {
Sven Eckelmann04b482a2012-05-12 02:09:38 +0200439 soft_iface = batadv_softif_create(iface_name);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000440
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000441 if (!soft_iface) {
442 ret = -ENOMEM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000443 goto err;
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000444 }
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000445
446 /* dev_get_by_name() increases the reference counter for us */
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000447 dev_hold(soft_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000448 }
449
Sven Eckelmann04b482a2012-05-12 02:09:38 +0200450 if (!batadv_softif_is_valid(soft_iface)) {
Sven Eckelmann86ceb362012-03-07 09:07:45 +0100451 pr_err("Can't create batman mesh interface %s: already exists as regular interface\n",
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000452 soft_iface->name);
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000453 ret = -EINVAL;
Marek Lindner77af7572012-02-07 17:20:48 +0800454 goto err_dev;
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000455 }
456
Antonio Quartullicb4b0d42013-02-16 14:42:39 +0100457 /* check if the interface is enslaved in another virtual one and
458 * in that case unlink it first
459 */
460 master = netdev_master_upper_dev_get(hard_iface->net_dev);
461 ret = batadv_master_del_slave(hard_iface, master);
462 if (ret)
463 goto err_dev;
464
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000465 hard_iface->soft_iface = soft_iface;
Marek Lindnere6c10f42011-02-18 12:33:20 +0000466 bat_priv = netdev_priv(hard_iface->soft_iface);
Marek Lindnerd0b9fd82011-07-30 12:33:33 +0200467
Jiri Pirko6dffb042015-12-03 12:12:10 +0100468 ret = netdev_master_upper_dev_link(hard_iface->net_dev,
Jiri Pirko29bf24a2015-12-03 12:12:11 +0100469 soft_iface, NULL, NULL);
Sven Eckelmann3dbd5502013-02-11 17:10:27 +0800470 if (ret)
471 goto err_dev;
472
Marek Lindner77af7572012-02-07 17:20:48 +0800473 ret = bat_priv->bat_algo_ops->bat_iface_enable(hard_iface);
Sven Eckelmann5346c352012-05-05 13:27:28 +0200474 if (ret < 0)
Sven Eckelmann3dbd5502013-02-11 17:10:27 +0800475 goto err_upper;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000476
Marek Lindnere6c10f42011-02-18 12:33:20 +0000477 hard_iface->if_num = bat_priv->num_ifaces;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000478 bat_priv->num_ifaces++;
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200479 hard_iface->if_status = BATADV_IF_INACTIVE;
Simon Wunderlich62446302012-07-01 22:51:55 +0200480 ret = batadv_orig_hash_add_if(hard_iface, bat_priv->num_ifaces);
481 if (ret < 0) {
482 bat_priv->bat_algo_ops->bat_iface_disable(hard_iface);
483 bat_priv->num_ifaces--;
484 hard_iface->if_status = BATADV_IF_NOT_IN_USE;
Sven Eckelmann3dbd5502013-02-11 17:10:27 +0800485 goto err_upper;
Simon Wunderlich62446302012-07-01 22:51:55 +0200486 }
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000487
Sven Eckelmann7e071c72012-06-03 22:19:13 +0200488 hard_iface->batman_adv_ptype.type = ethertype;
Sven Eckelmann3193e8f2012-05-12 02:09:42 +0200489 hard_iface->batman_adv_ptype.func = batadv_batman_skb_recv;
Marek Lindnere6c10f42011-02-18 12:33:20 +0000490 hard_iface->batman_adv_ptype.dev = hard_iface->net_dev;
491 dev_add_pack(&hard_iface->batman_adv_ptype);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000492
Sven Eckelmann3e348192012-05-16 20:23:22 +0200493 batadv_info(hard_iface->soft_iface, "Adding interface: %s\n",
494 hard_iface->net_dev->name);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000495
Sven Eckelmann0aca2362012-06-19 20:26:30 +0200496 if (atomic_read(&bat_priv->fragmentation) &&
Marek Lindner411d6ed2013-05-08 13:31:59 +0800497 hard_iface->net_dev->mtu < ETH_DATA_LEN + max_header_len)
Sven Eckelmann3e348192012-05-16 20:23:22 +0200498 batadv_info(hard_iface->soft_iface,
Marek Lindner411d6ed2013-05-08 13:31:59 +0800499 "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",
Sven Eckelmann3e348192012-05-16 20:23:22 +0200500 hard_iface->net_dev->name, hard_iface->net_dev->mtu,
Marek Lindner411d6ed2013-05-08 13:31:59 +0800501 ETH_DATA_LEN + max_header_len);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000502
Sven Eckelmann0aca2362012-06-19 20:26:30 +0200503 if (!atomic_read(&bat_priv->fragmentation) &&
Marek Lindner411d6ed2013-05-08 13:31:59 +0800504 hard_iface->net_dev->mtu < ETH_DATA_LEN + max_header_len)
Sven Eckelmann3e348192012-05-16 20:23:22 +0200505 batadv_info(hard_iface->soft_iface,
Marek Lindner411d6ed2013-05-08 13:31:59 +0800506 "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",
Sven Eckelmann3e348192012-05-16 20:23:22 +0200507 hard_iface->net_dev->name, hard_iface->net_dev->mtu,
Marek Lindner411d6ed2013-05-08 13:31:59 +0800508 ETH_DATA_LEN + max_header_len);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000509
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200510 if (batadv_hardif_is_iface_up(hard_iface))
511 batadv_hardif_activate_interface(hard_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000512 else
Sven Eckelmann3e348192012-05-16 20:23:22 +0200513 batadv_err(hard_iface->soft_iface,
514 "Not using interface %s (retrying later): interface not active\n",
515 hard_iface->net_dev->name);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000516
Sven Eckelmann7bca68c2015-08-07 19:28:42 +0200517 batadv_hardif_recalc_extra_skbroom(soft_iface);
518
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000519 /* begin scheduling originator messages on that interface */
Sven Eckelmann9455e342012-05-12 02:09:37 +0200520 batadv_schedule_bat_ogm(hard_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000521
522out:
523 return 0;
524
Sven Eckelmann3dbd5502013-02-11 17:10:27 +0800525err_upper:
526 netdev_upper_dev_unlink(hard_iface->net_dev, soft_iface);
Marek Lindner77af7572012-02-07 17:20:48 +0800527err_dev:
Sven Eckelmann3dbd5502013-02-11 17:10:27 +0800528 hard_iface->soft_iface = NULL;
Marek Lindner77af7572012-02-07 17:20:48 +0800529 dev_put(soft_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000530err:
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200531 batadv_hardif_free_ref(hard_iface);
Sven Eckelmanne44d8fe2011-03-04 21:36:41 +0000532 return ret;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000533}
534
Sven Eckelmanna15fd362013-02-11 17:10:24 +0800535void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
536 enum batadv_hard_if_cleanup autodel)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000537{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200538 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
539 struct batadv_hard_iface *primary_if = NULL;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000540
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200541 if (hard_iface->if_status == BATADV_IF_ACTIVE)
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200542 batadv_hardif_deactivate_interface(hard_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000543
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200544 if (hard_iface->if_status != BATADV_IF_INACTIVE)
Marek Lindner32ae9b22011-04-20 15:40:58 +0200545 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000546
Sven Eckelmann3e348192012-05-16 20:23:22 +0200547 batadv_info(hard_iface->soft_iface, "Removing interface: %s\n",
548 hard_iface->net_dev->name);
Marek Lindnere6c10f42011-02-18 12:33:20 +0000549 dev_remove_pack(&hard_iface->batman_adv_ptype);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000550
551 bat_priv->num_ifaces--;
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200552 batadv_orig_hash_del_if(hard_iface, bat_priv->num_ifaces);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000553
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200554 primary_if = batadv_primary_if_get_selected(bat_priv);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200555 if (hard_iface == primary_if) {
Sven Eckelmann56303d32012-06-05 22:31:31 +0200556 struct batadv_hard_iface *new_if;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000557
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200558 new_if = batadv_hardif_get_active(hard_iface->soft_iface);
559 batadv_primary_if_select(bat_priv, new_if);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000560
561 if (new_if)
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200562 batadv_hardif_free_ref(new_if);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000563 }
564
Marek Lindner00a50072012-02-07 17:20:47 +0800565 bat_priv->bat_algo_ops->bat_iface_disable(hard_iface);
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200566 hard_iface->if_status = BATADV_IF_NOT_IN_USE;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000567
Marek Lindnere6c10f42011-02-18 12:33:20 +0000568 /* delete all references to this hard_iface */
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200569 batadv_purge_orig_ref(bat_priv);
Sven Eckelmann9455e342012-05-12 02:09:37 +0200570 batadv_purge_outstanding_packets(bat_priv, hard_iface);
Marek Lindnere6c10f42011-02-18 12:33:20 +0000571 dev_put(hard_iface->soft_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000572
Antonio Quartullia5256f72015-08-04 22:26:19 +0200573 netdev_upper_dev_unlink(hard_iface->net_dev, hard_iface->soft_iface);
Sven Eckelmann7bca68c2015-08-07 19:28:42 +0200574 batadv_hardif_recalc_extra_skbroom(hard_iface->soft_iface);
Antonio Quartullia5256f72015-08-04 22:26:19 +0200575
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000576 /* nobody uses this interface anymore */
Antonio Quartulli8257f552013-08-19 18:39:59 +0200577 if (!bat_priv->num_ifaces) {
578 batadv_gw_check_client_stop(bat_priv);
579
580 if (autodel == BATADV_IF_CLEANUP_AUTO)
581 batadv_softif_destroy_sysfs(hard_iface->soft_iface);
582 }
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000583
Marek Lindnere6c10f42011-02-18 12:33:20 +0000584 hard_iface->soft_iface = NULL;
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200585 batadv_hardif_free_ref(hard_iface);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200586
587out:
588 if (primary_if)
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200589 batadv_hardif_free_ref(primary_if);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000590}
591
Simon Wunderlich5bc44dc2013-01-11 10:19:51 +0100592/**
593 * batadv_hardif_remove_interface_finish - cleans up the remains of a hardif
594 * @work: work queue item
595 *
596 * Free the parts of the hard interface which can not be removed under
597 * rtnl lock (to prevent deadlock situations).
598 */
599static void batadv_hardif_remove_interface_finish(struct work_struct *work)
600{
601 struct batadv_hard_iface *hard_iface;
602
603 hard_iface = container_of(work, struct batadv_hard_iface,
604 cleanup_work);
605
Simon Wunderlich5bc7c1e2013-11-21 14:16:12 +0100606 batadv_debugfs_del_hardif(hard_iface);
Simon Wunderlich5bc44dc2013-01-11 10:19:51 +0100607 batadv_sysfs_del_hardif(&hard_iface->hardif_obj);
608 batadv_hardif_free_ref(hard_iface);
609}
610
Sven Eckelmann56303d32012-06-05 22:31:31 +0200611static struct batadv_hard_iface *
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200612batadv_hardif_add_interface(struct net_device *net_dev)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000613{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200614 struct batadv_hard_iface *hard_iface;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000615 int ret;
616
Sven Eckelmannc3caf512011-05-03 11:51:38 +0200617 ASSERT_RTNL();
618
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200619 ret = batadv_is_valid_iface(net_dev);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000620 if (ret != 1)
621 goto out;
622
623 dev_hold(net_dev);
624
Antonio Quartulli7db3fc22013-04-02 12:16:53 +0200625 hard_iface = kzalloc(sizeof(*hard_iface), GFP_ATOMIC);
Joe Perches320f4222011-08-29 14:17:24 -0700626 if (!hard_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000627 goto release_dev;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000628
Sven Eckelmann5853e222012-05-12 02:09:24 +0200629 ret = batadv_sysfs_add_hardif(&hard_iface->hardif_obj, net_dev);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000630 if (ret)
631 goto free_if;
632
Marek Lindnere6c10f42011-02-18 12:33:20 +0000633 hard_iface->if_num = -1;
634 hard_iface->net_dev = net_dev;
635 hard_iface->soft_iface = NULL;
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200636 hard_iface->if_status = BATADV_IF_NOT_IN_USE;
Simon Wunderlich5bc7c1e2013-11-21 14:16:12 +0100637
638 ret = batadv_debugfs_add_hardif(hard_iface);
639 if (ret)
640 goto free_sysfs;
641
Marek Lindnere6c10f42011-02-18 12:33:20 +0000642 INIT_LIST_HEAD(&hard_iface->list);
Marek Lindnercef63412015-08-04 21:09:55 +0800643 INIT_HLIST_HEAD(&hard_iface->neigh_list);
Simon Wunderlich5bc44dc2013-01-11 10:19:51 +0100644 INIT_WORK(&hard_iface->cleanup_work,
645 batadv_hardif_remove_interface_finish);
646
Marek Lindnercef63412015-08-04 21:09:55 +0800647 spin_lock_init(&hard_iface->neigh_list_lock);
648
Matthias Schiffercaf65bf2013-03-09 23:14:23 +0100649 hard_iface->num_bcasts = BATADV_NUM_BCASTS_DEFAULT;
650 if (batadv_is_wifi_netdev(net_dev))
651 hard_iface->num_bcasts = BATADV_NUM_BCASTS_WIRELESS;
652
Marek Lindnered75ccb2011-02-10 14:33:51 +0000653 /* extra reference for return */
Marek Lindnere6c10f42011-02-18 12:33:20 +0000654 atomic_set(&hard_iface->refcount, 2);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000655
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200656 batadv_check_known_mac_addr(hard_iface->net_dev);
Sven Eckelmann3193e8f2012-05-12 02:09:42 +0200657 list_add_tail_rcu(&hard_iface->list, &batadv_hardif_list);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000658
Marek Lindnere6c10f42011-02-18 12:33:20 +0000659 return hard_iface;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000660
Simon Wunderlich5bc7c1e2013-11-21 14:16:12 +0100661free_sysfs:
662 batadv_sysfs_del_hardif(&hard_iface->hardif_obj);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000663free_if:
Marek Lindnere6c10f42011-02-18 12:33:20 +0000664 kfree(hard_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000665release_dev:
666 dev_put(net_dev);
667out:
668 return NULL;
669}
670
Sven Eckelmann56303d32012-06-05 22:31:31 +0200671static void batadv_hardif_remove_interface(struct batadv_hard_iface *hard_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000672{
Sven Eckelmannc3caf512011-05-03 11:51:38 +0200673 ASSERT_RTNL();
674
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000675 /* first deactivate interface */
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200676 if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
Sven Eckelmanna15fd362013-02-11 17:10:24 +0800677 batadv_hardif_disable_interface(hard_iface,
678 BATADV_IF_CLEANUP_AUTO);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000679
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200680 if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000681 return;
682
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200683 hard_iface->if_status = BATADV_IF_TO_BE_REMOVED;
Simon Wunderlich5bc44dc2013-01-11 10:19:51 +0100684 queue_work(batadv_event_workqueue, &hard_iface->cleanup_work);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000685}
686
Sven Eckelmann95638772012-05-12 02:09:31 +0200687void batadv_hardif_remove_interfaces(void)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000688{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200689 struct batadv_hard_iface *hard_iface, *hard_iface_tmp;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000690
Sven Eckelmannc3caf512011-05-03 11:51:38 +0200691 rtnl_lock();
Marek Lindnere6c10f42011-02-18 12:33:20 +0000692 list_for_each_entry_safe(hard_iface, hard_iface_tmp,
Sven Eckelmann3193e8f2012-05-12 02:09:42 +0200693 &batadv_hardif_list, list) {
Marek Lindnere6c10f42011-02-18 12:33:20 +0000694 list_del_rcu(&hard_iface->list);
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200695 batadv_hardif_remove_interface(hard_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000696 }
697 rtnl_unlock();
698}
699
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200700static int batadv_hard_if_event(struct notifier_block *this,
701 unsigned long event, void *ptr)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000702{
Jiri Pirko351638e2013-05-28 01:30:21 +0000703 struct net_device *net_dev = netdev_notifier_info_to_dev(ptr);
Sven Eckelmann56303d32012-06-05 22:31:31 +0200704 struct batadv_hard_iface *hard_iface;
705 struct batadv_hard_iface *primary_if = NULL;
706 struct batadv_priv *bat_priv;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000707
Sven Eckelmann37130292013-02-11 17:10:22 +0800708 if (batadv_softif_is_valid(net_dev) && event == NETDEV_REGISTER) {
709 batadv_sysfs_add_meshif(net_dev);
Antonio Quartulli5d2c05b2013-07-02 11:04:34 +0200710 bat_priv = netdev_priv(net_dev);
711 batadv_softif_create_vlan(bat_priv, BATADV_NO_FLAGS);
Sven Eckelmann37130292013-02-11 17:10:22 +0800712 return NOTIFY_DONE;
713 }
714
Sven Eckelmann56303d32012-06-05 22:31:31 +0200715 hard_iface = batadv_hardif_get_by_netdev(net_dev);
Andrew Lunna1a66b12015-12-03 21:12:33 +0100716 if (!hard_iface && (event == NETDEV_REGISTER ||
717 event == NETDEV_POST_TYPE_CHANGE))
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200718 hard_iface = batadv_hardif_add_interface(net_dev);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000719
Marek Lindnere6c10f42011-02-18 12:33:20 +0000720 if (!hard_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000721 goto out;
722
723 switch (event) {
724 case NETDEV_UP:
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200725 batadv_hardif_activate_interface(hard_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000726 break;
727 case NETDEV_GOING_DOWN:
728 case NETDEV_DOWN:
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200729 batadv_hardif_deactivate_interface(hard_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000730 break;
731 case NETDEV_UNREGISTER:
Andrew Lunna1a66b12015-12-03 21:12:33 +0100732 case NETDEV_PRE_TYPE_CHANGE:
Marek Lindnere6c10f42011-02-18 12:33:20 +0000733 list_del_rcu(&hard_iface->list);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000734
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200735 batadv_hardif_remove_interface(hard_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000736 break;
737 case NETDEV_CHANGEMTU:
Marek Lindnere6c10f42011-02-18 12:33:20 +0000738 if (hard_iface->soft_iface)
Sven Eckelmann95638772012-05-12 02:09:31 +0200739 batadv_update_min_mtu(hard_iface->soft_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000740 break;
741 case NETDEV_CHANGEADDR:
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200742 if (hard_iface->if_status == BATADV_IF_NOT_IN_USE)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000743 goto hardif_put;
744
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200745 batadv_check_known_mac_addr(hard_iface->net_dev);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000746
Marek Lindnere6c10f42011-02-18 12:33:20 +0000747 bat_priv = netdev_priv(hard_iface->soft_iface);
Marek Lindnerc3229392012-03-11 06:17:50 +0800748 bat_priv->bat_algo_ops->bat_iface_update_mac(hard_iface);
Marek Lindner01c42242011-11-28 21:31:55 +0800749
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200750 primary_if = batadv_primary_if_get_selected(bat_priv);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200751 if (!primary_if)
752 goto hardif_put;
753
754 if (hard_iface == primary_if)
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200755 batadv_primary_if_update_addr(bat_priv, NULL);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000756 break;
757 default:
758 break;
Joe Perchesf81c6222011-06-03 11:51:19 +0000759 }
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000760
761hardif_put:
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200762 batadv_hardif_free_ref(hard_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000763out:
Marek Lindner32ae9b22011-04-20 15:40:58 +0200764 if (primary_if)
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200765 batadv_hardif_free_ref(primary_if);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000766 return NOTIFY_DONE;
767}
768
Sven Eckelmann95638772012-05-12 02:09:31 +0200769struct notifier_block batadv_hard_if_notifier = {
Sven Eckelmann18a1cb62012-05-12 18:33:57 +0200770 .notifier_call = batadv_hard_if_event,
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000771};