Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1 | /* |
Sven Eckelmann | 567db7b | 2012-01-01 00:41:38 +0100 | [diff] [blame] | 2 | * Copyright (C) 2007-2012 B.A.T.M.A.N. contributors: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 3 | * |
| 4 | * Marek Lindner, Simon Wunderlich |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of version 2 of the GNU General Public |
| 8 | * License as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 18 | * 02110-1301, USA |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | #include "main.h" |
| 23 | #include "hard-interface.h" |
| 24 | #include "soft-interface.h" |
| 25 | #include "send.h" |
| 26 | #include "translation-table.h" |
| 27 | #include "routing.h" |
| 28 | #include "bat_sysfs.h" |
| 29 | #include "originator.h" |
| 30 | #include "hash.h" |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame] | 31 | #include "bridge_loop_avoidance.h" |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 32 | |
| 33 | #include <linux/if_arp.h> |
| 34 | |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 35 | void hardif_free_rcu(struct rcu_head *rcu) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 36 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 37 | struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 38 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 39 | hard_iface = container_of(rcu, struct hard_iface, rcu); |
| 40 | dev_put(hard_iface->net_dev); |
| 41 | kfree(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 42 | } |
| 43 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 44 | struct hard_iface *hardif_get_by_netdev(const struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 45 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 46 | struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 47 | |
| 48 | rcu_read_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 49 | list_for_each_entry_rcu(hard_iface, &hardif_list, list) { |
| 50 | if (hard_iface->net_dev == net_dev && |
| 51 | atomic_inc_not_zero(&hard_iface->refcount)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 52 | goto out; |
| 53 | } |
| 54 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 55 | hard_iface = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 56 | |
| 57 | out: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 58 | rcu_read_unlock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 59 | return hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 60 | } |
| 61 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 62 | static int is_valid_iface(const struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 63 | { |
| 64 | if (net_dev->flags & IFF_LOOPBACK) |
| 65 | return 0; |
| 66 | |
| 67 | if (net_dev->type != ARPHRD_ETHER) |
| 68 | return 0; |
| 69 | |
| 70 | if (net_dev->addr_len != ETH_ALEN) |
| 71 | return 0; |
| 72 | |
| 73 | /* no batman over batman */ |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 74 | if (softif_is_valid(net_dev)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 75 | return 0; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 76 | |
| 77 | /* Device is being bridged */ |
| 78 | /* if (net_dev->priv_flags & IFF_BRIDGE_PORT) |
| 79 | return 0; */ |
| 80 | |
| 81 | return 1; |
| 82 | } |
| 83 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 84 | static struct hard_iface *hardif_get_active(const struct net_device *soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 85 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 86 | struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 87 | |
| 88 | rcu_read_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 89 | list_for_each_entry_rcu(hard_iface, &hardif_list, list) { |
| 90 | if (hard_iface->soft_iface != soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 91 | continue; |
| 92 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 93 | if (hard_iface->if_status == IF_ACTIVE && |
| 94 | atomic_inc_not_zero(&hard_iface->refcount)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 95 | goto out; |
| 96 | } |
| 97 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 98 | hard_iface = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 99 | |
| 100 | out: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 101 | rcu_read_unlock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 102 | return hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 103 | } |
| 104 | |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame] | 105 | static void primary_if_update_addr(struct bat_priv *bat_priv, |
| 106 | struct hard_iface *oldif) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 107 | { |
| 108 | struct vis_packet *vis_packet; |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 109 | struct hard_iface *primary_if; |
| 110 | |
| 111 | primary_if = primary_if_get_selected(bat_priv); |
| 112 | if (!primary_if) |
| 113 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 114 | |
| 115 | vis_packet = (struct vis_packet *) |
| 116 | bat_priv->my_vis_info->skb_packet->data; |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 117 | memcpy(vis_packet->vis_orig, primary_if->net_dev->dev_addr, ETH_ALEN); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 118 | memcpy(vis_packet->sender_orig, |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 119 | primary_if->net_dev->dev_addr, ETH_ALEN); |
| 120 | |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame] | 121 | bla_update_orig_address(bat_priv, primary_if, oldif); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 122 | out: |
| 123 | if (primary_if) |
| 124 | hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 125 | } |
| 126 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 127 | static void primary_if_select(struct bat_priv *bat_priv, |
| 128 | struct hard_iface *new_hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 129 | { |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 130 | struct hard_iface *curr_hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 131 | |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 132 | ASSERT_RTNL(); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 133 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 134 | if (new_hard_iface && !atomic_inc_not_zero(&new_hard_iface->refcount)) |
| 135 | new_hard_iface = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 136 | |
Sven Eckelmann | 728cbc6 | 2011-05-15 00:50:21 +0200 | [diff] [blame] | 137 | curr_hard_iface = rcu_dereference_protected(bat_priv->primary_if, 1); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 138 | rcu_assign_pointer(bat_priv->primary_if, new_hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 139 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 140 | if (!new_hard_iface) |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame] | 141 | goto out; |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 142 | |
Marek Lindner | cd8b78e | 2012-02-07 17:20:49 +0800 | [diff] [blame] | 143 | bat_priv->bat_algo_ops->bat_primary_iface_set(new_hard_iface); |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame] | 144 | primary_if_update_addr(bat_priv, curr_hard_iface); |
| 145 | |
| 146 | out: |
| 147 | if (curr_hard_iface) |
| 148 | hardif_free_ref(curr_hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 149 | } |
| 150 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 151 | static bool hardif_is_iface_up(const struct hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 152 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 153 | if (hard_iface->net_dev->flags & IFF_UP) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 154 | return true; |
| 155 | |
| 156 | return false; |
| 157 | } |
| 158 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 159 | static void check_known_mac_addr(const struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 160 | { |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 161 | const struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 162 | |
| 163 | rcu_read_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 164 | list_for_each_entry_rcu(hard_iface, &hardif_list, list) { |
| 165 | if ((hard_iface->if_status != IF_ACTIVE) && |
| 166 | (hard_iface->if_status != IF_TO_BE_ACTIVATED)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 167 | continue; |
| 168 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 169 | if (hard_iface->net_dev == net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 170 | continue; |
| 171 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 172 | if (!compare_eth(hard_iface->net_dev->dev_addr, |
| 173 | net_dev->dev_addr)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 174 | continue; |
| 175 | |
Sven Eckelmann | 6796958 | 2012-03-26 16:22:45 +0200 | [diff] [blame] | 176 | pr_warn("The newly added mac address (%pM) already exists on: %s\n", |
| 177 | net_dev->dev_addr, hard_iface->net_dev->name); |
| 178 | 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] | 179 | } |
| 180 | rcu_read_unlock(); |
| 181 | } |
| 182 | |
| 183 | int hardif_min_mtu(struct net_device *soft_iface) |
| 184 | { |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 185 | const struct bat_priv *bat_priv = netdev_priv(soft_iface); |
| 186 | const struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 187 | /* allow big frames if all devices are capable to do so |
| 188 | * (have MTU > 1500 + BAT_HEADER_LEN) */ |
| 189 | int min_mtu = ETH_DATA_LEN; |
| 190 | |
| 191 | if (atomic_read(&bat_priv->fragmentation)) |
| 192 | goto out; |
| 193 | |
| 194 | rcu_read_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 195 | list_for_each_entry_rcu(hard_iface, &hardif_list, list) { |
| 196 | if ((hard_iface->if_status != IF_ACTIVE) && |
| 197 | (hard_iface->if_status != IF_TO_BE_ACTIVATED)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 198 | continue; |
| 199 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 200 | if (hard_iface->soft_iface != soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 201 | continue; |
| 202 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 203 | min_mtu = min_t(int, hard_iface->net_dev->mtu - BAT_HEADER_LEN, |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 204 | min_mtu); |
| 205 | } |
| 206 | rcu_read_unlock(); |
| 207 | out: |
| 208 | return min_mtu; |
| 209 | } |
| 210 | |
| 211 | /* adjusts the MTU if a new interface with a smaller MTU appeared. */ |
| 212 | void update_min_mtu(struct net_device *soft_iface) |
| 213 | { |
| 214 | int min_mtu; |
| 215 | |
| 216 | min_mtu = hardif_min_mtu(soft_iface); |
| 217 | if (soft_iface->mtu != min_mtu) |
| 218 | soft_iface->mtu = min_mtu; |
| 219 | } |
| 220 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 221 | static void hardif_activate_interface(struct hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 222 | { |
| 223 | struct bat_priv *bat_priv; |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 224 | struct hard_iface *primary_if = NULL; |
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->if_status != IF_INACTIVE) |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 227 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 228 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 229 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 230 | |
Marek Lindner | c322939 | 2012-03-11 06:17:50 +0800 | [diff] [blame] | 231 | bat_priv->bat_algo_ops->bat_iface_update_mac(hard_iface); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 232 | hard_iface->if_status = IF_TO_BE_ACTIVATED; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 233 | |
| 234 | /** |
| 235 | * the first active interface becomes our primary interface or |
Antonio Quartulli | 015758d | 2011-07-09 17:52:13 +0200 | [diff] [blame] | 236 | * the next active interface after the old primary interface was removed |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 237 | */ |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 238 | primary_if = primary_if_get_selected(bat_priv); |
| 239 | if (!primary_if) |
| 240 | primary_if_select(bat_priv, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 241 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 242 | bat_info(hard_iface->soft_iface, "Interface activated: %s\n", |
| 243 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 244 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 245 | update_min_mtu(hard_iface->soft_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 246 | |
| 247 | out: |
| 248 | if (primary_if) |
| 249 | hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 250 | } |
| 251 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 252 | static void hardif_deactivate_interface(struct hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 253 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 254 | if ((hard_iface->if_status != IF_ACTIVE) && |
| 255 | (hard_iface->if_status != IF_TO_BE_ACTIVATED)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 256 | return; |
| 257 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 258 | hard_iface->if_status = IF_INACTIVE; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 259 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 260 | bat_info(hard_iface->soft_iface, "Interface deactivated: %s\n", |
| 261 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 262 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 263 | update_min_mtu(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 264 | } |
| 265 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 266 | int hardif_enable_interface(struct hard_iface *hard_iface, |
| 267 | const char *iface_name) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 268 | { |
| 269 | struct bat_priv *bat_priv; |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 270 | struct net_device *soft_iface; |
| 271 | int ret; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 272 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 273 | if (hard_iface->if_status != IF_NOT_IN_USE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 274 | goto out; |
| 275 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 276 | if (!atomic_inc_not_zero(&hard_iface->refcount)) |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 277 | goto out; |
| 278 | |
Marek Lindner | 6e242f9 | 2011-12-07 18:02:50 +0800 | [diff] [blame] | 279 | /* hard-interface is part of a bridge */ |
| 280 | if (hard_iface->net_dev->priv_flags & IFF_BRIDGE_PORT) |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 281 | pr_err("You are about to enable batman-adv on '%s' which already is part of a bridge. Unless you know exactly what you are doing this is probably wrong and won't work the way you think it would.\n", |
Marek Lindner | 6e242f9 | 2011-12-07 18:02:50 +0800 | [diff] [blame] | 282 | hard_iface->net_dev->name); |
| 283 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 284 | soft_iface = dev_get_by_name(&init_net, iface_name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 285 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 286 | if (!soft_iface) { |
| 287 | soft_iface = softif_create(iface_name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 288 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 289 | if (!soft_iface) { |
| 290 | ret = -ENOMEM; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 291 | goto err; |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 292 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 293 | |
| 294 | /* dev_get_by_name() increases the reference counter for us */ |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 295 | dev_hold(soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 296 | } |
| 297 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 298 | if (!softif_is_valid(soft_iface)) { |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 299 | 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] | 300 | soft_iface->name); |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 301 | ret = -EINVAL; |
Marek Lindner | 77af757 | 2012-02-07 17:20:48 +0800 | [diff] [blame] | 302 | goto err_dev; |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 303 | } |
| 304 | |
| 305 | hard_iface->soft_iface = soft_iface; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 306 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 307 | |
Marek Lindner | 77af757 | 2012-02-07 17:20:48 +0800 | [diff] [blame] | 308 | ret = bat_priv->bat_algo_ops->bat_iface_enable(hard_iface); |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame^] | 309 | if (ret < 0) |
Marek Lindner | 77af757 | 2012-02-07 17:20:48 +0800 | [diff] [blame] | 310 | goto err_dev; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 311 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 312 | hard_iface->if_num = bat_priv->num_ifaces; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 313 | bat_priv->num_ifaces++; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 314 | hard_iface->if_status = IF_INACTIVE; |
| 315 | orig_hash_add_if(hard_iface, bat_priv->num_ifaces); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 316 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 317 | hard_iface->batman_adv_ptype.type = __constant_htons(ETH_P_BATMAN); |
| 318 | hard_iface->batman_adv_ptype.func = batman_skb_recv; |
| 319 | hard_iface->batman_adv_ptype.dev = hard_iface->net_dev; |
| 320 | dev_add_pack(&hard_iface->batman_adv_ptype); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 321 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 322 | atomic_set(&hard_iface->frag_seqno, 1); |
| 323 | bat_info(hard_iface->soft_iface, "Adding interface: %s\n", |
| 324 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 325 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 326 | if (atomic_read(&bat_priv->fragmentation) && hard_iface->net_dev->mtu < |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 327 | ETH_DATA_LEN + BAT_HEADER_LEN) |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 328 | bat_info(hard_iface->soft_iface, |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 329 | "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 %zi would solve the problem.\n", |
Sven Eckelmann | 7c64fd9 | 2012-02-28 10:55:36 +0100 | [diff] [blame] | 330 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
| 331 | ETH_DATA_LEN + BAT_HEADER_LEN); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 332 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 333 | if (!atomic_read(&bat_priv->fragmentation) && hard_iface->net_dev->mtu < |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 334 | ETH_DATA_LEN + BAT_HEADER_LEN) |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 335 | bat_info(hard_iface->soft_iface, |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 336 | "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 %zi.\n", |
Sven Eckelmann | 7c64fd9 | 2012-02-28 10:55:36 +0100 | [diff] [blame] | 337 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
| 338 | ETH_DATA_LEN + BAT_HEADER_LEN); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 339 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 340 | if (hardif_is_iface_up(hard_iface)) |
| 341 | hardif_activate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 342 | else |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 343 | bat_err(hard_iface->soft_iface, |
| 344 | "Not using interface %s (retrying later): interface not active\n", |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 345 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 346 | |
| 347 | /* begin scheduling originator messages on that interface */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 348 | schedule_bat_ogm(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 349 | |
| 350 | out: |
| 351 | return 0; |
| 352 | |
Marek Lindner | 77af757 | 2012-02-07 17:20:48 +0800 | [diff] [blame] | 353 | err_dev: |
| 354 | dev_put(soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 355 | err: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 356 | hardif_free_ref(hard_iface); |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 357 | return ret; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 358 | } |
| 359 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 360 | void hardif_disable_interface(struct hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 361 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 362 | struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 363 | struct hard_iface *primary_if = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 364 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 365 | if (hard_iface->if_status == IF_ACTIVE) |
| 366 | hardif_deactivate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 367 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 368 | if (hard_iface->if_status != IF_INACTIVE) |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 369 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 370 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 371 | bat_info(hard_iface->soft_iface, "Removing interface: %s\n", |
| 372 | hard_iface->net_dev->name); |
| 373 | dev_remove_pack(&hard_iface->batman_adv_ptype); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 374 | |
| 375 | bat_priv->num_ifaces--; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 376 | orig_hash_del_if(hard_iface, bat_priv->num_ifaces); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 377 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 378 | primary_if = primary_if_get_selected(bat_priv); |
| 379 | if (hard_iface == primary_if) { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 380 | struct hard_iface *new_if; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 381 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 382 | new_if = hardif_get_active(hard_iface->soft_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 383 | primary_if_select(bat_priv, new_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 384 | |
| 385 | if (new_if) |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 386 | hardif_free_ref(new_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 387 | } |
| 388 | |
Marek Lindner | 00a5007 | 2012-02-07 17:20:47 +0800 | [diff] [blame] | 389 | bat_priv->bat_algo_ops->bat_iface_disable(hard_iface); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 390 | hard_iface->if_status = IF_NOT_IN_USE; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 391 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 392 | /* delete all references to this hard_iface */ |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 393 | purge_orig_ref(bat_priv); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 394 | purge_outstanding_packets(bat_priv, hard_iface); |
| 395 | dev_put(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 396 | |
| 397 | /* nobody uses this interface anymore */ |
| 398 | if (!bat_priv->num_ifaces) |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 399 | softif_destroy(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 400 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 401 | hard_iface->soft_iface = NULL; |
| 402 | hardif_free_ref(hard_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 403 | |
| 404 | out: |
| 405 | if (primary_if) |
| 406 | hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 407 | } |
| 408 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 409 | static struct hard_iface *hardif_add_interface(struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 410 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 411 | struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 412 | int ret; |
| 413 | |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 414 | ASSERT_RTNL(); |
| 415 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 416 | ret = is_valid_iface(net_dev); |
| 417 | if (ret != 1) |
| 418 | goto out; |
| 419 | |
| 420 | dev_hold(net_dev); |
| 421 | |
Sven Eckelmann | 704509b | 2011-05-14 23:14:54 +0200 | [diff] [blame] | 422 | hard_iface = kmalloc(sizeof(*hard_iface), GFP_ATOMIC); |
Joe Perches | 320f422 | 2011-08-29 14:17:24 -0700 | [diff] [blame] | 423 | if (!hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 424 | goto release_dev; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 425 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 426 | ret = sysfs_add_hardif(&hard_iface->hardif_obj, net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 427 | if (ret) |
| 428 | goto free_if; |
| 429 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 430 | hard_iface->if_num = -1; |
| 431 | hard_iface->net_dev = net_dev; |
| 432 | hard_iface->soft_iface = NULL; |
| 433 | hard_iface->if_status = IF_NOT_IN_USE; |
| 434 | INIT_LIST_HEAD(&hard_iface->list); |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 435 | /* extra reference for return */ |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 436 | atomic_set(&hard_iface->refcount, 2); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 437 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 438 | check_known_mac_addr(hard_iface->net_dev); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 439 | list_add_tail_rcu(&hard_iface->list, &hardif_list); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 440 | |
Marek Lindner | 8140625 | 2012-02-07 17:19:58 +0800 | [diff] [blame] | 441 | /** |
| 442 | * This can't be called via a bat_priv callback because |
| 443 | * we have no bat_priv yet. |
| 444 | */ |
| 445 | atomic_set(&hard_iface->seqno, 1); |
| 446 | hard_iface->packet_buff = NULL; |
| 447 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 448 | return hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 449 | |
| 450 | free_if: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 451 | kfree(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 452 | release_dev: |
| 453 | dev_put(net_dev); |
| 454 | out: |
| 455 | return NULL; |
| 456 | } |
| 457 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 458 | static void hardif_remove_interface(struct hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 459 | { |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 460 | ASSERT_RTNL(); |
| 461 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 462 | /* first deactivate interface */ |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 463 | if (hard_iface->if_status != IF_NOT_IN_USE) |
| 464 | hardif_disable_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 465 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 466 | if (hard_iface->if_status != IF_NOT_IN_USE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 467 | return; |
| 468 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 469 | hard_iface->if_status = IF_TO_BE_REMOVED; |
| 470 | sysfs_del_hardif(&hard_iface->hardif_obj); |
| 471 | hardif_free_ref(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 472 | } |
| 473 | |
| 474 | void hardif_remove_interfaces(void) |
| 475 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 476 | struct hard_iface *hard_iface, *hard_iface_tmp; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 477 | |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 478 | rtnl_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 479 | list_for_each_entry_safe(hard_iface, hard_iface_tmp, |
| 480 | &hardif_list, list) { |
| 481 | list_del_rcu(&hard_iface->list); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 482 | hardif_remove_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 483 | } |
| 484 | rtnl_unlock(); |
| 485 | } |
| 486 | |
| 487 | static int hard_if_event(struct notifier_block *this, |
| 488 | unsigned long event, void *ptr) |
| 489 | { |
Sven Eckelmann | 5f718c2 | 2011-05-14 23:14:52 +0200 | [diff] [blame] | 490 | struct net_device *net_dev = ptr; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 491 | struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 492 | struct hard_iface *primary_if = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 493 | struct bat_priv *bat_priv; |
| 494 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 495 | if (!hard_iface && event == NETDEV_REGISTER) |
| 496 | hard_iface = hardif_add_interface(net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 497 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 498 | if (!hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 499 | goto out; |
| 500 | |
| 501 | switch (event) { |
| 502 | case NETDEV_UP: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 503 | hardif_activate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 504 | break; |
| 505 | case NETDEV_GOING_DOWN: |
| 506 | case NETDEV_DOWN: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 507 | hardif_deactivate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 508 | break; |
| 509 | case NETDEV_UNREGISTER: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 510 | list_del_rcu(&hard_iface->list); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 511 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 512 | hardif_remove_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 513 | break; |
| 514 | case NETDEV_CHANGEMTU: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 515 | if (hard_iface->soft_iface) |
| 516 | update_min_mtu(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 517 | break; |
| 518 | case NETDEV_CHANGEADDR: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 519 | if (hard_iface->if_status == IF_NOT_IN_USE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 520 | goto hardif_put; |
| 521 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 522 | check_known_mac_addr(hard_iface->net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 523 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 524 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | c322939 | 2012-03-11 06:17:50 +0800 | [diff] [blame] | 525 | bat_priv->bat_algo_ops->bat_iface_update_mac(hard_iface); |
Marek Lindner | 01c4224 | 2011-11-28 21:31:55 +0800 | [diff] [blame] | 526 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 527 | primary_if = primary_if_get_selected(bat_priv); |
| 528 | if (!primary_if) |
| 529 | goto hardif_put; |
| 530 | |
| 531 | if (hard_iface == primary_if) |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame] | 532 | primary_if_update_addr(bat_priv, NULL); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 533 | break; |
| 534 | default: |
| 535 | break; |
Joe Perches | f81c622 | 2011-06-03 11:51:19 +0000 | [diff] [blame] | 536 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 537 | |
| 538 | hardif_put: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 539 | hardif_free_ref(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 540 | out: |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 541 | if (primary_if) |
| 542 | hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 543 | return NOTIFY_DONE; |
| 544 | } |
| 545 | |
Antonio Quartulli | bc27908 | 2011-07-07 15:35:35 +0200 | [diff] [blame] | 546 | /* This function returns true if the interface represented by ifindex is a |
| 547 | * 802.11 wireless device */ |
| 548 | bool is_wifi_iface(int ifindex) |
| 549 | { |
| 550 | struct net_device *net_device = NULL; |
| 551 | bool ret = false; |
| 552 | |
| 553 | if (ifindex == NULL_IFINDEX) |
| 554 | goto out; |
| 555 | |
| 556 | net_device = dev_get_by_index(&init_net, ifindex); |
| 557 | if (!net_device) |
| 558 | goto out; |
| 559 | |
| 560 | #ifdef CONFIG_WIRELESS_EXT |
| 561 | /* pre-cfg80211 drivers have to implement WEXT, so it is possible to |
| 562 | * check for wireless_handlers != NULL */ |
| 563 | if (net_device->wireless_handlers) |
| 564 | ret = true; |
| 565 | else |
| 566 | #endif |
| 567 | /* cfg80211 drivers have to set ieee80211_ptr */ |
| 568 | if (net_device->ieee80211_ptr) |
| 569 | ret = true; |
| 570 | out: |
| 571 | if (net_device) |
| 572 | dev_put(net_device); |
| 573 | return ret; |
| 574 | } |
| 575 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 576 | struct notifier_block hard_if_notifier = { |
| 577 | .notifier_call = hard_if_event, |
| 578 | }; |