Sven Eckelmann | 9f6446c | 2015-04-23 13:16:35 +0200 | [diff] [blame] | 1 | /* Copyright (C) 2007-2015 B.A.T.M.A.N. contributors: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 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 |
Antonio Quartulli | ebf38fb | 2013-11-03 20:40:48 +0100 | [diff] [blame] | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 16 | */ |
| 17 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 18 | #include "hard-interface.h" |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 19 | #include "main.h" |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 20 | |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 21 | #include <linux/bug.h> |
| 22 | #include <linux/byteorder/generic.h> |
| 23 | #include <linux/errno.h> |
| 24 | #include <linux/fs.h> |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 25 | #include <linux/if_arp.h> |
Antonio Quartulli | af5d4f7 | 2012-11-26 00:38:50 +0100 | [diff] [blame] | 26 | #include <linux/if_ether.h> |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 27 | #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 Lindner | cef6341 | 2015-08-04 21:09:55 +0800 | [diff] [blame] | 35 | #include <linux/spinlock.h> |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 36 | #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 Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 49 | |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 50 | void batadv_hardif_free_rcu(struct rcu_head *rcu) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 51 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 52 | struct batadv_hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 53 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 54 | hard_iface = container_of(rcu, struct batadv_hard_iface, rcu); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 55 | dev_put(hard_iface->net_dev); |
| 56 | kfree(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 57 | } |
| 58 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 59 | struct batadv_hard_iface * |
| 60 | batadv_hardif_get_by_netdev(const struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 61 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 62 | struct batadv_hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 63 | |
| 64 | rcu_read_lock(); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 65 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 66 | if (hard_iface->net_dev == net_dev && |
| 67 | atomic_inc_not_zero(&hard_iface->refcount)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 68 | goto out; |
| 69 | } |
| 70 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 71 | hard_iface = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 72 | |
| 73 | out: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 74 | rcu_read_unlock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 75 | return hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 76 | } |
| 77 | |
Antonio Quartulli | b7eddd0 | 2012-09-09 10:46:46 +0200 | [diff] [blame] | 78 | /** |
| 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 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame^] | 88 | * Return: true if the device is descendant of a batman-adv mesh interface (or |
Antonio Quartulli | b7eddd0 | 2012-09-09 10:46:46 +0200 | [diff] [blame] | 89 | * if it is a batman-adv interface itself), false otherwise |
| 90 | */ |
| 91 | static 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 Dichtel | a54acb3 | 2015-04-02 17:07:00 +0200 | [diff] [blame] | 101 | if (dev_get_iflink(net_dev) == 0 || |
| 102 | dev_get_iflink(net_dev) == net_dev->ifindex) |
Antonio Quartulli | b7eddd0 | 2012-09-09 10:46:46 +0200 | [diff] [blame] | 103 | return false; |
| 104 | |
| 105 | /* recurse over the parent device */ |
Nicolas Dichtel | a54acb3 | 2015-04-02 17:07:00 +0200 | [diff] [blame] | 106 | parent_dev = __dev_get_by_index(&init_net, dev_get_iflink(net_dev)); |
Antonio Quartulli | b7eddd0 | 2012-09-09 10:46:46 +0200 | [diff] [blame] | 107 | /* 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 Quartulli | b7eddd0 | 2012-09-09 10:46:46 +0200 | [diff] [blame] | 113 | return ret; |
| 114 | } |
| 115 | |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 116 | static int batadv_is_valid_iface(const struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 117 | { |
| 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 Quartulli | b7eddd0 | 2012-09-09 10:46:46 +0200 | [diff] [blame] | 128 | if (batadv_is_on_batman_iface(net_dev)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 129 | return 0; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 130 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 131 | return 1; |
| 132 | } |
| 133 | |
Matthias Schiffer | de68d10 | 2013-03-09 23:14:22 +0100 | [diff] [blame] | 134 | /** |
| 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 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame^] | 139 | * Return: true if the net device is a 802.11 wireless device, false otherwise. |
Matthias Schiffer | de68d10 | 2013-03-09 23:14:22 +0100 | [diff] [blame] | 140 | */ |
Antonio Quartulli | 0c69aec | 2013-10-13 02:50:18 +0200 | [diff] [blame] | 141 | bool batadv_is_wifi_netdev(struct net_device *net_device) |
Matthias Schiffer | de68d10 | 2013-03-09 23:14:22 +0100 | [diff] [blame] | 142 | { |
Antonio Quartulli | 0c69aec | 2013-10-13 02:50:18 +0200 | [diff] [blame] | 143 | if (!net_device) |
| 144 | return false; |
| 145 | |
Matthias Schiffer | de68d10 | 2013-03-09 23:14:22 +0100 | [diff] [blame] | 146 | #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 Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 161 | static struct batadv_hard_iface * |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 162 | batadv_hardif_get_active(const struct net_device *soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 163 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 164 | struct batadv_hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 165 | |
| 166 | rcu_read_lock(); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 167 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 168 | if (hard_iface->soft_iface != soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 169 | continue; |
| 170 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 171 | if (hard_iface->if_status == BATADV_IF_ACTIVE && |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 172 | atomic_inc_not_zero(&hard_iface->refcount)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 173 | goto out; |
| 174 | } |
| 175 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 176 | hard_iface = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 177 | |
| 178 | out: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 179 | rcu_read_unlock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 180 | return hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 181 | } |
| 182 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 183 | static void batadv_primary_if_update_addr(struct batadv_priv *bat_priv, |
| 184 | struct batadv_hard_iface *oldif) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 185 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 186 | struct batadv_hard_iface *primary_if; |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 187 | |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 188 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 189 | if (!primary_if) |
| 190 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 191 | |
Antonio Quartulli | 785ea11 | 2011-11-23 11:35:44 +0100 | [diff] [blame] | 192 | batadv_dat_init_own_addr(bat_priv, primary_if); |
Sven Eckelmann | 08adf15 | 2012-05-12 13:38:47 +0200 | [diff] [blame] | 193 | batadv_bla_update_orig_address(bat_priv, primary_if, oldif); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 194 | out: |
| 195 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 196 | batadv_hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 197 | } |
| 198 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 199 | static void batadv_primary_if_select(struct batadv_priv *bat_priv, |
| 200 | struct batadv_hard_iface *new_hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 201 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 202 | struct batadv_hard_iface *curr_hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 203 | |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 204 | ASSERT_RTNL(); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 205 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 206 | if (new_hard_iface && !atomic_inc_not_zero(&new_hard_iface->refcount)) |
| 207 | new_hard_iface = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 208 | |
Sven Eckelmann | 728cbc6 | 2011-05-15 00:50:21 +0200 | [diff] [blame] | 209 | curr_hard_iface = rcu_dereference_protected(bat_priv->primary_if, 1); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 210 | rcu_assign_pointer(bat_priv->primary_if, new_hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 211 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 212 | if (!new_hard_iface) |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame] | 213 | goto out; |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 214 | |
Marek Lindner | cd8b78e | 2012-02-07 17:20:49 +0800 | [diff] [blame] | 215 | bat_priv->bat_algo_ops->bat_primary_iface_set(new_hard_iface); |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 216 | batadv_primary_if_update_addr(bat_priv, curr_hard_iface); |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame] | 217 | |
| 218 | out: |
| 219 | if (curr_hard_iface) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 220 | batadv_hardif_free_ref(curr_hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 221 | } |
| 222 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 223 | static bool |
| 224 | batadv_hardif_is_iface_up(const struct batadv_hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 225 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 226 | if (hard_iface->net_dev->flags & IFF_UP) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 227 | return true; |
| 228 | |
| 229 | return false; |
| 230 | } |
| 231 | |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 232 | static void batadv_check_known_mac_addr(const struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 233 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 234 | const struct batadv_hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 235 | |
| 236 | rcu_read_lock(); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 237 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 238 | if ((hard_iface->if_status != BATADV_IF_ACTIVE) && |
| 239 | (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 240 | continue; |
| 241 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 242 | if (hard_iface->net_dev == net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 243 | continue; |
| 244 | |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 245 | if (!batadv_compare_eth(hard_iface->net_dev->dev_addr, |
| 246 | net_dev->dev_addr)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 247 | continue; |
| 248 | |
Sven Eckelmann | 6796958 | 2012-03-26 16:22:45 +0200 | [diff] [blame] | 249 | 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 Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 252 | } |
| 253 | rcu_read_unlock(); |
| 254 | } |
| 255 | |
Sven Eckelmann | 7bca68c | 2015-08-07 19:28:42 +0200 | [diff] [blame] | 256 | /** |
| 257 | * batadv_hardif_recalc_extra_skbroom() - Recalculate skbuff extra head/tailroom |
| 258 | * @soft_iface: netdev struct of the mesh interface |
| 259 | */ |
| 260 | static 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 Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 294 | int batadv_hardif_min_mtu(struct net_device *soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 295 | { |
Marek Lindner | a19d3d8 | 2013-05-27 15:33:25 +0800 | [diff] [blame] | 296 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 297 | const struct batadv_hard_iface *hard_iface; |
Antonio Quartulli | 930cd6e | 2014-01-21 11:22:05 +0100 | [diff] [blame] | 298 | int min_mtu = INT_MAX; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 299 | |
| 300 | rcu_read_lock(); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 301 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 302 | if ((hard_iface->if_status != BATADV_IF_ACTIVE) && |
| 303 | (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 304 | continue; |
| 305 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 306 | if (hard_iface->soft_iface != soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 307 | continue; |
| 308 | |
Marek Lindner | a19d3d8 | 2013-05-27 15:33:25 +0800 | [diff] [blame] | 309 | min_mtu = min_t(int, hard_iface->net_dev->mtu, min_mtu); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 310 | } |
| 311 | rcu_read_unlock(); |
Marek Lindner | a19d3d8 | 2013-05-27 15:33:25 +0800 | [diff] [blame] | 312 | |
Marek Lindner | a19d3d8 | 2013-05-27 15:33:25 +0800 | [diff] [blame] | 313 | 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 Lindner | a19d3d8 | 2013-05-27 15:33:25 +0800 | [diff] [blame] | 323 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 324 | out: |
Antonio Quartulli | 930cd6e | 2014-01-21 11:22:05 +0100 | [diff] [blame] | 325 | /* 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 Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 338 | } |
| 339 | |
| 340 | /* adjusts the MTU if a new interface with a smaller MTU appeared. */ |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 341 | void batadv_update_min_mtu(struct net_device *soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 342 | { |
Marek Lindner | a19d3d8 | 2013-05-27 15:33:25 +0800 | [diff] [blame] | 343 | soft_iface->mtu = batadv_hardif_min_mtu(soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 344 | |
Marek Lindner | a19d3d8 | 2013-05-27 15:33:25 +0800 | [diff] [blame] | 345 | /* 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 Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 349 | } |
| 350 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 351 | static void |
| 352 | batadv_hardif_activate_interface(struct batadv_hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 353 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 354 | struct batadv_priv *bat_priv; |
| 355 | struct batadv_hard_iface *primary_if = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 356 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 357 | if (hard_iface->if_status != BATADV_IF_INACTIVE) |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 358 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 359 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 360 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 361 | |
Marek Lindner | c322939 | 2012-03-11 06:17:50 +0800 | [diff] [blame] | 362 | bat_priv->bat_algo_ops->bat_iface_update_mac(hard_iface); |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 363 | hard_iface->if_status = BATADV_IF_TO_BE_ACTIVATED; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 364 | |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 365 | /* the first active interface becomes our primary interface or |
Antonio Quartulli | 015758d | 2011-07-09 17:52:13 +0200 | [diff] [blame] | 366 | * the next active interface after the old primary interface was removed |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 367 | */ |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 368 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 369 | if (!primary_if) |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 370 | batadv_primary_if_select(bat_priv, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 371 | |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 372 | batadv_info(hard_iface->soft_iface, "Interface activated: %s\n", |
| 373 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 374 | |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 375 | batadv_update_min_mtu(hard_iface->soft_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 376 | |
| 377 | out: |
| 378 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 379 | batadv_hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 380 | } |
| 381 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 382 | static void |
| 383 | batadv_hardif_deactivate_interface(struct batadv_hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 384 | { |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 385 | if ((hard_iface->if_status != BATADV_IF_ACTIVE) && |
| 386 | (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 387 | return; |
| 388 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 389 | hard_iface->if_status = BATADV_IF_INACTIVE; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 390 | |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 391 | batadv_info(hard_iface->soft_iface, "Interface deactivated: %s\n", |
| 392 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 393 | |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 394 | batadv_update_min_mtu(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 395 | } |
| 396 | |
Antonio Quartulli | cb4b0d4 | 2013-02-16 14:42:39 +0100 | [diff] [blame] | 397 | /** |
| 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. |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame^] | 404 | * |
| 405 | * Return: 0 on success, a negative value representing the error otherwise |
Antonio Quartulli | cb4b0d4 | 2013-02-16 14:42:39 +0100 | [diff] [blame] | 406 | */ |
| 407 | static int batadv_master_del_slave(struct batadv_hard_iface *slave, |
| 408 | struct net_device *master) |
| 409 | { |
| 410 | int ret; |
| 411 | |
| 412 | if (!master) |
| 413 | return 0; |
| 414 | |
| 415 | ret = -EBUSY; |
| 416 | if (master->netdev_ops->ndo_del_slave) |
| 417 | ret = master->netdev_ops->ndo_del_slave(master, slave->net_dev); |
| 418 | |
| 419 | return ret; |
| 420 | } |
| 421 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 422 | int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 423 | const char *iface_name) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 424 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 425 | struct batadv_priv *bat_priv; |
Antonio Quartulli | cb4b0d4 | 2013-02-16 14:42:39 +0100 | [diff] [blame] | 426 | struct net_device *soft_iface, *master; |
Antonio Quartulli | 293e933 | 2013-05-19 12:55:16 +0200 | [diff] [blame] | 427 | __be16 ethertype = htons(ETH_P_BATMAN); |
Marek Lindner | 411d6ed | 2013-05-08 13:31:59 +0800 | [diff] [blame] | 428 | int max_header_len = batadv_max_header_len(); |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 429 | int ret; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 430 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 431 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 432 | goto out; |
| 433 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 434 | if (!atomic_inc_not_zero(&hard_iface->refcount)) |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 435 | goto out; |
| 436 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 437 | soft_iface = dev_get_by_name(&init_net, iface_name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 438 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 439 | if (!soft_iface) { |
Sven Eckelmann | 04b482a | 2012-05-12 02:09:38 +0200 | [diff] [blame] | 440 | soft_iface = batadv_softif_create(iface_name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 441 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 442 | if (!soft_iface) { |
| 443 | ret = -ENOMEM; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 444 | goto err; |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 445 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 446 | |
| 447 | /* dev_get_by_name() increases the reference counter for us */ |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 448 | dev_hold(soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 449 | } |
| 450 | |
Sven Eckelmann | 04b482a | 2012-05-12 02:09:38 +0200 | [diff] [blame] | 451 | if (!batadv_softif_is_valid(soft_iface)) { |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 452 | pr_err("Can't create batman mesh interface %s: already exists as regular interface\n", |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 453 | soft_iface->name); |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 454 | ret = -EINVAL; |
Marek Lindner | 77af757 | 2012-02-07 17:20:48 +0800 | [diff] [blame] | 455 | goto err_dev; |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 456 | } |
| 457 | |
Antonio Quartulli | cb4b0d4 | 2013-02-16 14:42:39 +0100 | [diff] [blame] | 458 | /* check if the interface is enslaved in another virtual one and |
| 459 | * in that case unlink it first |
| 460 | */ |
| 461 | master = netdev_master_upper_dev_get(hard_iface->net_dev); |
| 462 | ret = batadv_master_del_slave(hard_iface, master); |
| 463 | if (ret) |
| 464 | goto err_dev; |
| 465 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 466 | hard_iface->soft_iface = soft_iface; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 467 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 468 | |
Jiri Pirko | 6dffb04 | 2015-12-03 12:12:10 +0100 | [diff] [blame] | 469 | ret = netdev_master_upper_dev_link(hard_iface->net_dev, |
Jiri Pirko | 29bf24a | 2015-12-03 12:12:11 +0100 | [diff] [blame] | 470 | soft_iface, NULL, NULL); |
Sven Eckelmann | 3dbd550 | 2013-02-11 17:10:27 +0800 | [diff] [blame] | 471 | if (ret) |
| 472 | goto err_dev; |
| 473 | |
Marek Lindner | 77af757 | 2012-02-07 17:20:48 +0800 | [diff] [blame] | 474 | ret = bat_priv->bat_algo_ops->bat_iface_enable(hard_iface); |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 475 | if (ret < 0) |
Sven Eckelmann | 3dbd550 | 2013-02-11 17:10:27 +0800 | [diff] [blame] | 476 | goto err_upper; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 477 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 478 | hard_iface->if_num = bat_priv->num_ifaces; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 479 | bat_priv->num_ifaces++; |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 480 | hard_iface->if_status = BATADV_IF_INACTIVE; |
Simon Wunderlich | 6244630 | 2012-07-01 22:51:55 +0200 | [diff] [blame] | 481 | ret = batadv_orig_hash_add_if(hard_iface, bat_priv->num_ifaces); |
| 482 | if (ret < 0) { |
| 483 | bat_priv->bat_algo_ops->bat_iface_disable(hard_iface); |
| 484 | bat_priv->num_ifaces--; |
| 485 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; |
Sven Eckelmann | 3dbd550 | 2013-02-11 17:10:27 +0800 | [diff] [blame] | 486 | goto err_upper; |
Simon Wunderlich | 6244630 | 2012-07-01 22:51:55 +0200 | [diff] [blame] | 487 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 488 | |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 489 | hard_iface->batman_adv_ptype.type = ethertype; |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 490 | hard_iface->batman_adv_ptype.func = batadv_batman_skb_recv; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 491 | hard_iface->batman_adv_ptype.dev = hard_iface->net_dev; |
| 492 | dev_add_pack(&hard_iface->batman_adv_ptype); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 493 | |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 494 | batadv_info(hard_iface->soft_iface, "Adding interface: %s\n", |
| 495 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 496 | |
Sven Eckelmann | 0aca236 | 2012-06-19 20:26:30 +0200 | [diff] [blame] | 497 | if (atomic_read(&bat_priv->fragmentation) && |
Marek Lindner | 411d6ed | 2013-05-08 13:31:59 +0800 | [diff] [blame] | 498 | hard_iface->net_dev->mtu < ETH_DATA_LEN + max_header_len) |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 499 | batadv_info(hard_iface->soft_iface, |
Marek Lindner | 411d6ed | 2013-05-08 13:31:59 +0800 | [diff] [blame] | 500 | "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 Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 501 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
Marek Lindner | 411d6ed | 2013-05-08 13:31:59 +0800 | [diff] [blame] | 502 | ETH_DATA_LEN + max_header_len); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 503 | |
Sven Eckelmann | 0aca236 | 2012-06-19 20:26:30 +0200 | [diff] [blame] | 504 | if (!atomic_read(&bat_priv->fragmentation) && |
Marek Lindner | 411d6ed | 2013-05-08 13:31:59 +0800 | [diff] [blame] | 505 | hard_iface->net_dev->mtu < ETH_DATA_LEN + max_header_len) |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 506 | batadv_info(hard_iface->soft_iface, |
Marek Lindner | 411d6ed | 2013-05-08 13:31:59 +0800 | [diff] [blame] | 507 | "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 Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 508 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
Marek Lindner | 411d6ed | 2013-05-08 13:31:59 +0800 | [diff] [blame] | 509 | ETH_DATA_LEN + max_header_len); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 510 | |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 511 | if (batadv_hardif_is_iface_up(hard_iface)) |
| 512 | batadv_hardif_activate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 513 | else |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 514 | batadv_err(hard_iface->soft_iface, |
| 515 | "Not using interface %s (retrying later): interface not active\n", |
| 516 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 517 | |
Sven Eckelmann | 7bca68c | 2015-08-07 19:28:42 +0200 | [diff] [blame] | 518 | batadv_hardif_recalc_extra_skbroom(soft_iface); |
| 519 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 520 | /* begin scheduling originator messages on that interface */ |
Sven Eckelmann | 9455e34 | 2012-05-12 02:09:37 +0200 | [diff] [blame] | 521 | batadv_schedule_bat_ogm(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 522 | |
| 523 | out: |
| 524 | return 0; |
| 525 | |
Sven Eckelmann | 3dbd550 | 2013-02-11 17:10:27 +0800 | [diff] [blame] | 526 | err_upper: |
| 527 | netdev_upper_dev_unlink(hard_iface->net_dev, soft_iface); |
Marek Lindner | 77af757 | 2012-02-07 17:20:48 +0800 | [diff] [blame] | 528 | err_dev: |
Sven Eckelmann | 3dbd550 | 2013-02-11 17:10:27 +0800 | [diff] [blame] | 529 | hard_iface->soft_iface = NULL; |
Marek Lindner | 77af757 | 2012-02-07 17:20:48 +0800 | [diff] [blame] | 530 | dev_put(soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 531 | err: |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 532 | batadv_hardif_free_ref(hard_iface); |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 533 | return ret; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 534 | } |
| 535 | |
Sven Eckelmann | a15fd36 | 2013-02-11 17:10:24 +0800 | [diff] [blame] | 536 | void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface, |
| 537 | enum batadv_hard_if_cleanup autodel) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 538 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 539 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
| 540 | struct batadv_hard_iface *primary_if = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 541 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 542 | if (hard_iface->if_status == BATADV_IF_ACTIVE) |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 543 | batadv_hardif_deactivate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 544 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 545 | if (hard_iface->if_status != BATADV_IF_INACTIVE) |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 546 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 547 | |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 548 | batadv_info(hard_iface->soft_iface, "Removing interface: %s\n", |
| 549 | hard_iface->net_dev->name); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 550 | dev_remove_pack(&hard_iface->batman_adv_ptype); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 551 | |
| 552 | bat_priv->num_ifaces--; |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 553 | batadv_orig_hash_del_if(hard_iface, bat_priv->num_ifaces); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 554 | |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 555 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 556 | if (hard_iface == primary_if) { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 557 | struct batadv_hard_iface *new_if; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 558 | |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 559 | new_if = batadv_hardif_get_active(hard_iface->soft_iface); |
| 560 | batadv_primary_if_select(bat_priv, new_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 561 | |
| 562 | if (new_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 563 | batadv_hardif_free_ref(new_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 564 | } |
| 565 | |
Marek Lindner | 00a5007 | 2012-02-07 17:20:47 +0800 | [diff] [blame] | 566 | bat_priv->bat_algo_ops->bat_iface_disable(hard_iface); |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 567 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 568 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 569 | /* delete all references to this hard_iface */ |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 570 | batadv_purge_orig_ref(bat_priv); |
Sven Eckelmann | 9455e34 | 2012-05-12 02:09:37 +0200 | [diff] [blame] | 571 | batadv_purge_outstanding_packets(bat_priv, hard_iface); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 572 | dev_put(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 573 | |
Antonio Quartulli | a5256f7 | 2015-08-04 22:26:19 +0200 | [diff] [blame] | 574 | netdev_upper_dev_unlink(hard_iface->net_dev, hard_iface->soft_iface); |
Sven Eckelmann | 7bca68c | 2015-08-07 19:28:42 +0200 | [diff] [blame] | 575 | batadv_hardif_recalc_extra_skbroom(hard_iface->soft_iface); |
Antonio Quartulli | a5256f7 | 2015-08-04 22:26:19 +0200 | [diff] [blame] | 576 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 577 | /* nobody uses this interface anymore */ |
Antonio Quartulli | 8257f55 | 2013-08-19 18:39:59 +0200 | [diff] [blame] | 578 | if (!bat_priv->num_ifaces) { |
| 579 | batadv_gw_check_client_stop(bat_priv); |
| 580 | |
| 581 | if (autodel == BATADV_IF_CLEANUP_AUTO) |
| 582 | batadv_softif_destroy_sysfs(hard_iface->soft_iface); |
| 583 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 584 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 585 | hard_iface->soft_iface = NULL; |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 586 | batadv_hardif_free_ref(hard_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 587 | |
| 588 | out: |
| 589 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 590 | batadv_hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 591 | } |
| 592 | |
Simon Wunderlich | 5bc44dc | 2013-01-11 10:19:51 +0100 | [diff] [blame] | 593 | /** |
| 594 | * batadv_hardif_remove_interface_finish - cleans up the remains of a hardif |
| 595 | * @work: work queue item |
| 596 | * |
| 597 | * Free the parts of the hard interface which can not be removed under |
| 598 | * rtnl lock (to prevent deadlock situations). |
| 599 | */ |
| 600 | static void batadv_hardif_remove_interface_finish(struct work_struct *work) |
| 601 | { |
| 602 | struct batadv_hard_iface *hard_iface; |
| 603 | |
| 604 | hard_iface = container_of(work, struct batadv_hard_iface, |
| 605 | cleanup_work); |
| 606 | |
Simon Wunderlich | 5bc7c1e | 2013-11-21 14:16:12 +0100 | [diff] [blame] | 607 | batadv_debugfs_del_hardif(hard_iface); |
Simon Wunderlich | 5bc44dc | 2013-01-11 10:19:51 +0100 | [diff] [blame] | 608 | batadv_sysfs_del_hardif(&hard_iface->hardif_obj); |
| 609 | batadv_hardif_free_ref(hard_iface); |
| 610 | } |
| 611 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 612 | static struct batadv_hard_iface * |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 613 | batadv_hardif_add_interface(struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 614 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 615 | struct batadv_hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 616 | int ret; |
| 617 | |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 618 | ASSERT_RTNL(); |
| 619 | |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 620 | ret = batadv_is_valid_iface(net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 621 | if (ret != 1) |
| 622 | goto out; |
| 623 | |
| 624 | dev_hold(net_dev); |
| 625 | |
Antonio Quartulli | 7db3fc2 | 2013-04-02 12:16:53 +0200 | [diff] [blame] | 626 | hard_iface = kzalloc(sizeof(*hard_iface), GFP_ATOMIC); |
Joe Perches | 320f422 | 2011-08-29 14:17:24 -0700 | [diff] [blame] | 627 | if (!hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 628 | goto release_dev; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 629 | |
Sven Eckelmann | 5853e22 | 2012-05-12 02:09:24 +0200 | [diff] [blame] | 630 | ret = batadv_sysfs_add_hardif(&hard_iface->hardif_obj, net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 631 | if (ret) |
| 632 | goto free_if; |
| 633 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 634 | hard_iface->if_num = -1; |
| 635 | hard_iface->net_dev = net_dev; |
| 636 | hard_iface->soft_iface = NULL; |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 637 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; |
Simon Wunderlich | 5bc7c1e | 2013-11-21 14:16:12 +0100 | [diff] [blame] | 638 | |
| 639 | ret = batadv_debugfs_add_hardif(hard_iface); |
| 640 | if (ret) |
| 641 | goto free_sysfs; |
| 642 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 643 | INIT_LIST_HEAD(&hard_iface->list); |
Marek Lindner | cef6341 | 2015-08-04 21:09:55 +0800 | [diff] [blame] | 644 | INIT_HLIST_HEAD(&hard_iface->neigh_list); |
Simon Wunderlich | 5bc44dc | 2013-01-11 10:19:51 +0100 | [diff] [blame] | 645 | INIT_WORK(&hard_iface->cleanup_work, |
| 646 | batadv_hardif_remove_interface_finish); |
| 647 | |
Marek Lindner | cef6341 | 2015-08-04 21:09:55 +0800 | [diff] [blame] | 648 | spin_lock_init(&hard_iface->neigh_list_lock); |
| 649 | |
Matthias Schiffer | caf65bf | 2013-03-09 23:14:23 +0100 | [diff] [blame] | 650 | hard_iface->num_bcasts = BATADV_NUM_BCASTS_DEFAULT; |
| 651 | if (batadv_is_wifi_netdev(net_dev)) |
| 652 | hard_iface->num_bcasts = BATADV_NUM_BCASTS_WIRELESS; |
| 653 | |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 654 | /* extra reference for return */ |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 655 | atomic_set(&hard_iface->refcount, 2); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 656 | |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 657 | batadv_check_known_mac_addr(hard_iface->net_dev); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 658 | list_add_tail_rcu(&hard_iface->list, &batadv_hardif_list); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 659 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 660 | return hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 661 | |
Simon Wunderlich | 5bc7c1e | 2013-11-21 14:16:12 +0100 | [diff] [blame] | 662 | free_sysfs: |
| 663 | batadv_sysfs_del_hardif(&hard_iface->hardif_obj); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 664 | free_if: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 665 | kfree(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 666 | release_dev: |
| 667 | dev_put(net_dev); |
| 668 | out: |
| 669 | return NULL; |
| 670 | } |
| 671 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 672 | static void batadv_hardif_remove_interface(struct batadv_hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 673 | { |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 674 | ASSERT_RTNL(); |
| 675 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 676 | /* first deactivate interface */ |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 677 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
Sven Eckelmann | a15fd36 | 2013-02-11 17:10:24 +0800 | [diff] [blame] | 678 | batadv_hardif_disable_interface(hard_iface, |
| 679 | BATADV_IF_CLEANUP_AUTO); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 680 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 681 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 682 | return; |
| 683 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 684 | hard_iface->if_status = BATADV_IF_TO_BE_REMOVED; |
Simon Wunderlich | 5bc44dc | 2013-01-11 10:19:51 +0100 | [diff] [blame] | 685 | queue_work(batadv_event_workqueue, &hard_iface->cleanup_work); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 686 | } |
| 687 | |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 688 | void batadv_hardif_remove_interfaces(void) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 689 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 690 | struct batadv_hard_iface *hard_iface, *hard_iface_tmp; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 691 | |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 692 | rtnl_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 693 | list_for_each_entry_safe(hard_iface, hard_iface_tmp, |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 694 | &batadv_hardif_list, list) { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 695 | list_del_rcu(&hard_iface->list); |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 696 | batadv_hardif_remove_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 697 | } |
| 698 | rtnl_unlock(); |
| 699 | } |
| 700 | |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 701 | static int batadv_hard_if_event(struct notifier_block *this, |
| 702 | unsigned long event, void *ptr) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 703 | { |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 704 | struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 705 | struct batadv_hard_iface *hard_iface; |
| 706 | struct batadv_hard_iface *primary_if = NULL; |
| 707 | struct batadv_priv *bat_priv; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 708 | |
Sven Eckelmann | 3713029 | 2013-02-11 17:10:22 +0800 | [diff] [blame] | 709 | if (batadv_softif_is_valid(net_dev) && event == NETDEV_REGISTER) { |
| 710 | batadv_sysfs_add_meshif(net_dev); |
Antonio Quartulli | 5d2c05b | 2013-07-02 11:04:34 +0200 | [diff] [blame] | 711 | bat_priv = netdev_priv(net_dev); |
| 712 | batadv_softif_create_vlan(bat_priv, BATADV_NO_FLAGS); |
Sven Eckelmann | 3713029 | 2013-02-11 17:10:22 +0800 | [diff] [blame] | 713 | return NOTIFY_DONE; |
| 714 | } |
| 715 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 716 | hard_iface = batadv_hardif_get_by_netdev(net_dev); |
Andrew Lunn | a1a66b1 | 2015-12-03 21:12:33 +0100 | [diff] [blame] | 717 | if (!hard_iface && (event == NETDEV_REGISTER || |
| 718 | event == NETDEV_POST_TYPE_CHANGE)) |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 719 | hard_iface = batadv_hardif_add_interface(net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 720 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 721 | if (!hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 722 | goto out; |
| 723 | |
| 724 | switch (event) { |
| 725 | case NETDEV_UP: |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 726 | batadv_hardif_activate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 727 | break; |
| 728 | case NETDEV_GOING_DOWN: |
| 729 | case NETDEV_DOWN: |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 730 | batadv_hardif_deactivate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 731 | break; |
| 732 | case NETDEV_UNREGISTER: |
Andrew Lunn | a1a66b1 | 2015-12-03 21:12:33 +0100 | [diff] [blame] | 733 | case NETDEV_PRE_TYPE_CHANGE: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 734 | list_del_rcu(&hard_iface->list); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 735 | |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 736 | batadv_hardif_remove_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 737 | break; |
| 738 | case NETDEV_CHANGEMTU: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 739 | if (hard_iface->soft_iface) |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 740 | batadv_update_min_mtu(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 741 | break; |
| 742 | case NETDEV_CHANGEADDR: |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 743 | if (hard_iface->if_status == BATADV_IF_NOT_IN_USE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 744 | goto hardif_put; |
| 745 | |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 746 | batadv_check_known_mac_addr(hard_iface->net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 747 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 748 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | c322939 | 2012-03-11 06:17:50 +0800 | [diff] [blame] | 749 | bat_priv->bat_algo_ops->bat_iface_update_mac(hard_iface); |
Marek Lindner | 01c4224 | 2011-11-28 21:31:55 +0800 | [diff] [blame] | 750 | |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 751 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 752 | if (!primary_if) |
| 753 | goto hardif_put; |
| 754 | |
| 755 | if (hard_iface == primary_if) |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 756 | batadv_primary_if_update_addr(bat_priv, NULL); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 757 | break; |
| 758 | default: |
| 759 | break; |
Joe Perches | f81c622 | 2011-06-03 11:51:19 +0000 | [diff] [blame] | 760 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 761 | |
| 762 | hardif_put: |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 763 | batadv_hardif_free_ref(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 764 | out: |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 765 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 766 | batadv_hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 767 | return NOTIFY_DONE; |
| 768 | } |
| 769 | |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 770 | struct notifier_block batadv_hard_if_notifier = { |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 771 | .notifier_call = batadv_hard_if_event, |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 772 | }; |