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 | |
Sven Eckelmann | fb86d76 | 2011-01-27 13:16:08 +0100 | [diff] [blame] | 35 | |
| 36 | static int batman_skb_recv(struct sk_buff *skb, |
| 37 | struct net_device *dev, |
| 38 | struct packet_type *ptype, |
| 39 | struct net_device *orig_dev); |
| 40 | |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 41 | void hardif_free_rcu(struct rcu_head *rcu) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 42 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 43 | struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 44 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 45 | hard_iface = container_of(rcu, struct hard_iface, rcu); |
| 46 | dev_put(hard_iface->net_dev); |
| 47 | kfree(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 48 | } |
| 49 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 50 | 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] | 51 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 52 | struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 53 | |
| 54 | rcu_read_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 55 | list_for_each_entry_rcu(hard_iface, &hardif_list, list) { |
| 56 | if (hard_iface->net_dev == net_dev && |
| 57 | atomic_inc_not_zero(&hard_iface->refcount)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 58 | goto out; |
| 59 | } |
| 60 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 61 | hard_iface = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 62 | |
| 63 | out: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 64 | rcu_read_unlock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 65 | return hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 66 | } |
| 67 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 68 | static int is_valid_iface(const struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 69 | { |
| 70 | if (net_dev->flags & IFF_LOOPBACK) |
| 71 | return 0; |
| 72 | |
| 73 | if (net_dev->type != ARPHRD_ETHER) |
| 74 | return 0; |
| 75 | |
| 76 | if (net_dev->addr_len != ETH_ALEN) |
| 77 | return 0; |
| 78 | |
| 79 | /* no batman over batman */ |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 80 | if (softif_is_valid(net_dev)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 81 | return 0; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 82 | |
| 83 | /* Device is being bridged */ |
| 84 | /* if (net_dev->priv_flags & IFF_BRIDGE_PORT) |
| 85 | return 0; */ |
| 86 | |
| 87 | return 1; |
| 88 | } |
| 89 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 90 | 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] | 91 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 92 | struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 93 | |
| 94 | rcu_read_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 95 | list_for_each_entry_rcu(hard_iface, &hardif_list, list) { |
| 96 | if (hard_iface->soft_iface != soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 97 | continue; |
| 98 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 99 | if (hard_iface->if_status == IF_ACTIVE && |
| 100 | atomic_inc_not_zero(&hard_iface->refcount)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 101 | goto out; |
| 102 | } |
| 103 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 104 | hard_iface = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 105 | |
| 106 | out: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 107 | rcu_read_unlock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 108 | return hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 109 | } |
| 110 | |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame^] | 111 | static void primary_if_update_addr(struct bat_priv *bat_priv, |
| 112 | struct hard_iface *oldif) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 113 | { |
| 114 | struct vis_packet *vis_packet; |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 115 | struct hard_iface *primary_if; |
| 116 | |
| 117 | primary_if = primary_if_get_selected(bat_priv); |
| 118 | if (!primary_if) |
| 119 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 120 | |
| 121 | vis_packet = (struct vis_packet *) |
| 122 | bat_priv->my_vis_info->skb_packet->data; |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 123 | 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] | 124 | memcpy(vis_packet->sender_orig, |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 125 | primary_if->net_dev->dev_addr, ETH_ALEN); |
| 126 | |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame^] | 127 | bla_update_orig_address(bat_priv, primary_if, oldif); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 128 | out: |
| 129 | if (primary_if) |
| 130 | hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 131 | } |
| 132 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 133 | static void primary_if_select(struct bat_priv *bat_priv, |
| 134 | struct hard_iface *new_hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 135 | { |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 136 | struct hard_iface *curr_hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 137 | |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 138 | ASSERT_RTNL(); |
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 && !atomic_inc_not_zero(&new_hard_iface->refcount)) |
| 141 | new_hard_iface = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 142 | |
Sven Eckelmann | 728cbc6 | 2011-05-15 00:50:21 +0200 | [diff] [blame] | 143 | curr_hard_iface = rcu_dereference_protected(bat_priv->primary_if, 1); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 144 | rcu_assign_pointer(bat_priv->primary_if, new_hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 145 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 146 | if (!new_hard_iface) |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame^] | 147 | goto out; |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 148 | |
Marek Lindner | 01c4224 | 2011-11-28 21:31:55 +0800 | [diff] [blame] | 149 | bat_priv->bat_algo_ops->bat_ogm_init_primary(new_hard_iface); |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame^] | 150 | primary_if_update_addr(bat_priv, curr_hard_iface); |
| 151 | |
| 152 | out: |
| 153 | if (curr_hard_iface) |
| 154 | hardif_free_ref(curr_hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 155 | } |
| 156 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 157 | static bool hardif_is_iface_up(const struct hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 158 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 159 | if (hard_iface->net_dev->flags & IFF_UP) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 160 | return true; |
| 161 | |
| 162 | return false; |
| 163 | } |
| 164 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 165 | static void check_known_mac_addr(const struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 166 | { |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 167 | const struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 168 | |
| 169 | rcu_read_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 170 | list_for_each_entry_rcu(hard_iface, &hardif_list, list) { |
| 171 | if ((hard_iface->if_status != IF_ACTIVE) && |
| 172 | (hard_iface->if_status != IF_TO_BE_ACTIVATED)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 173 | continue; |
| 174 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 175 | if (hard_iface->net_dev == net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 176 | continue; |
| 177 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 178 | if (!compare_eth(hard_iface->net_dev->dev_addr, |
| 179 | net_dev->dev_addr)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 180 | continue; |
| 181 | |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 182 | pr_warning("The newly added mac address (%pM) already exists on: %s\n", |
| 183 | net_dev->dev_addr, hard_iface->net_dev->name); |
| 184 | pr_warning("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] | 185 | } |
| 186 | rcu_read_unlock(); |
| 187 | } |
| 188 | |
| 189 | int hardif_min_mtu(struct net_device *soft_iface) |
| 190 | { |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 191 | const struct bat_priv *bat_priv = netdev_priv(soft_iface); |
| 192 | const struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 193 | /* allow big frames if all devices are capable to do so |
| 194 | * (have MTU > 1500 + BAT_HEADER_LEN) */ |
| 195 | int min_mtu = ETH_DATA_LEN; |
| 196 | |
| 197 | if (atomic_read(&bat_priv->fragmentation)) |
| 198 | goto out; |
| 199 | |
| 200 | rcu_read_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 201 | list_for_each_entry_rcu(hard_iface, &hardif_list, list) { |
| 202 | if ((hard_iface->if_status != IF_ACTIVE) && |
| 203 | (hard_iface->if_status != IF_TO_BE_ACTIVATED)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 204 | continue; |
| 205 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 206 | if (hard_iface->soft_iface != soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 207 | continue; |
| 208 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 209 | 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] | 210 | min_mtu); |
| 211 | } |
| 212 | rcu_read_unlock(); |
| 213 | out: |
| 214 | return min_mtu; |
| 215 | } |
| 216 | |
| 217 | /* adjusts the MTU if a new interface with a smaller MTU appeared. */ |
| 218 | void update_min_mtu(struct net_device *soft_iface) |
| 219 | { |
| 220 | int min_mtu; |
| 221 | |
| 222 | min_mtu = hardif_min_mtu(soft_iface); |
| 223 | if (soft_iface->mtu != min_mtu) |
| 224 | soft_iface->mtu = min_mtu; |
| 225 | } |
| 226 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 227 | static void hardif_activate_interface(struct hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 228 | { |
| 229 | struct bat_priv *bat_priv; |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 230 | struct hard_iface *primary_if = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 231 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 232 | if (hard_iface->if_status != IF_INACTIVE) |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 233 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 234 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 235 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 236 | |
Marek Lindner | 01c4224 | 2011-11-28 21:31:55 +0800 | [diff] [blame] | 237 | bat_priv->bat_algo_ops->bat_ogm_update_mac(hard_iface); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 238 | hard_iface->if_status = IF_TO_BE_ACTIVATED; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 239 | |
| 240 | /** |
| 241 | * the first active interface becomes our primary interface or |
Antonio Quartulli | 015758d | 2011-07-09 17:52:13 +0200 | [diff] [blame] | 242 | * the next active interface after the old primary interface was removed |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 243 | */ |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 244 | primary_if = primary_if_get_selected(bat_priv); |
| 245 | if (!primary_if) |
| 246 | primary_if_select(bat_priv, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 247 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 248 | bat_info(hard_iface->soft_iface, "Interface activated: %s\n", |
| 249 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 250 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 251 | update_min_mtu(hard_iface->soft_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 252 | |
| 253 | out: |
| 254 | if (primary_if) |
| 255 | hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 256 | } |
| 257 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 258 | static void hardif_deactivate_interface(struct hard_iface *hard_iface) |
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 | if ((hard_iface->if_status != IF_ACTIVE) && |
| 261 | (hard_iface->if_status != IF_TO_BE_ACTIVATED)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 262 | return; |
| 263 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 264 | hard_iface->if_status = IF_INACTIVE; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 265 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 266 | bat_info(hard_iface->soft_iface, "Interface deactivated: %s\n", |
| 267 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 268 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 269 | update_min_mtu(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 270 | } |
| 271 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 272 | int hardif_enable_interface(struct hard_iface *hard_iface, |
| 273 | const char *iface_name) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 274 | { |
| 275 | struct bat_priv *bat_priv; |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 276 | struct net_device *soft_iface; |
| 277 | int ret; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 278 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 279 | if (hard_iface->if_status != IF_NOT_IN_USE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 280 | goto out; |
| 281 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 282 | if (!atomic_inc_not_zero(&hard_iface->refcount)) |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 283 | goto out; |
| 284 | |
Marek Lindner | 6e242f9 | 2011-12-07 18:02:50 +0800 | [diff] [blame] | 285 | /* hard-interface is part of a bridge */ |
| 286 | if (hard_iface->net_dev->priv_flags & IFF_BRIDGE_PORT) |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 287 | 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] | 288 | hard_iface->net_dev->name); |
| 289 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 290 | soft_iface = dev_get_by_name(&init_net, iface_name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 291 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 292 | if (!soft_iface) { |
| 293 | soft_iface = softif_create(iface_name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 294 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 295 | if (!soft_iface) { |
| 296 | ret = -ENOMEM; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 297 | goto err; |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 298 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 299 | |
| 300 | /* dev_get_by_name() increases the reference counter for us */ |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 301 | dev_hold(soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 302 | } |
| 303 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 304 | if (!softif_is_valid(soft_iface)) { |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 305 | 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] | 306 | soft_iface->name); |
| 307 | dev_put(soft_iface); |
| 308 | ret = -EINVAL; |
| 309 | goto err; |
| 310 | } |
| 311 | |
| 312 | hard_iface->soft_iface = soft_iface; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 313 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 314 | |
Marek Lindner | 01c4224 | 2011-11-28 21:31:55 +0800 | [diff] [blame] | 315 | bat_priv->bat_algo_ops->bat_ogm_init(hard_iface); |
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 | if (!hard_iface->packet_buff) { |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 318 | bat_err(hard_iface->soft_iface, |
| 319 | "Can't add interface packet (%s): out of memory\n", |
| 320 | hard_iface->net_dev->name); |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 321 | ret = -ENOMEM; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 322 | goto err; |
| 323 | } |
| 324 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 325 | hard_iface->if_num = bat_priv->num_ifaces; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 326 | bat_priv->num_ifaces++; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 327 | hard_iface->if_status = IF_INACTIVE; |
| 328 | orig_hash_add_if(hard_iface, bat_priv->num_ifaces); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 329 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 330 | hard_iface->batman_adv_ptype.type = __constant_htons(ETH_P_BATMAN); |
| 331 | hard_iface->batman_adv_ptype.func = batman_skb_recv; |
| 332 | hard_iface->batman_adv_ptype.dev = hard_iface->net_dev; |
| 333 | dev_add_pack(&hard_iface->batman_adv_ptype); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 334 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 335 | atomic_set(&hard_iface->seqno, 1); |
| 336 | atomic_set(&hard_iface->frag_seqno, 1); |
| 337 | bat_info(hard_iface->soft_iface, "Adding interface: %s\n", |
| 338 | hard_iface->net_dev->name); |
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 (atomic_read(&bat_priv->fragmentation) && hard_iface->net_dev->mtu < |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 341 | ETH_DATA_LEN + BAT_HEADER_LEN) |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 342 | bat_info(hard_iface->soft_iface, |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 343 | "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] | 344 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
| 345 | ETH_DATA_LEN + BAT_HEADER_LEN); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 346 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 347 | if (!atomic_read(&bat_priv->fragmentation) && hard_iface->net_dev->mtu < |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 348 | ETH_DATA_LEN + BAT_HEADER_LEN) |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 349 | bat_info(hard_iface->soft_iface, |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 350 | "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] | 351 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
| 352 | ETH_DATA_LEN + BAT_HEADER_LEN); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 353 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 354 | if (hardif_is_iface_up(hard_iface)) |
| 355 | hardif_activate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 356 | else |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 357 | bat_err(hard_iface->soft_iface, |
| 358 | "Not using interface %s (retrying later): interface not active\n", |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 359 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 360 | |
| 361 | /* begin scheduling originator messages on that interface */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 362 | schedule_bat_ogm(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 363 | |
| 364 | out: |
| 365 | return 0; |
| 366 | |
| 367 | err: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 368 | hardif_free_ref(hard_iface); |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 369 | return ret; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 370 | } |
| 371 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 372 | void hardif_disable_interface(struct hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 373 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 374 | struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 375 | struct hard_iface *primary_if = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 376 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 377 | if (hard_iface->if_status == IF_ACTIVE) |
| 378 | hardif_deactivate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 379 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 380 | if (hard_iface->if_status != IF_INACTIVE) |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 381 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 382 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 383 | bat_info(hard_iface->soft_iface, "Removing interface: %s\n", |
| 384 | hard_iface->net_dev->name); |
| 385 | dev_remove_pack(&hard_iface->batman_adv_ptype); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 386 | |
| 387 | bat_priv->num_ifaces--; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 388 | orig_hash_del_if(hard_iface, bat_priv->num_ifaces); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 389 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 390 | primary_if = primary_if_get_selected(bat_priv); |
| 391 | if (hard_iface == primary_if) { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 392 | struct hard_iface *new_if; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 393 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 394 | new_if = hardif_get_active(hard_iface->soft_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 395 | primary_if_select(bat_priv, new_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 396 | |
| 397 | if (new_if) |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 398 | hardif_free_ref(new_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 399 | } |
| 400 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 401 | kfree(hard_iface->packet_buff); |
| 402 | hard_iface->packet_buff = NULL; |
| 403 | hard_iface->if_status = IF_NOT_IN_USE; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 404 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 405 | /* delete all references to this hard_iface */ |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 406 | purge_orig_ref(bat_priv); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 407 | purge_outstanding_packets(bat_priv, hard_iface); |
| 408 | dev_put(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 409 | |
| 410 | /* nobody uses this interface anymore */ |
| 411 | if (!bat_priv->num_ifaces) |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 412 | softif_destroy(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 413 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 414 | hard_iface->soft_iface = NULL; |
| 415 | hardif_free_ref(hard_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 416 | |
| 417 | out: |
| 418 | if (primary_if) |
| 419 | hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 420 | } |
| 421 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 422 | static struct hard_iface *hardif_add_interface(struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 423 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 424 | struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 425 | int ret; |
| 426 | |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 427 | ASSERT_RTNL(); |
| 428 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 429 | ret = is_valid_iface(net_dev); |
| 430 | if (ret != 1) |
| 431 | goto out; |
| 432 | |
| 433 | dev_hold(net_dev); |
| 434 | |
Sven Eckelmann | 704509b | 2011-05-14 23:14:54 +0200 | [diff] [blame] | 435 | hard_iface = kmalloc(sizeof(*hard_iface), GFP_ATOMIC); |
Joe Perches | 320f422 | 2011-08-29 14:17:24 -0700 | [diff] [blame] | 436 | if (!hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 437 | goto release_dev; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 438 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 439 | ret = sysfs_add_hardif(&hard_iface->hardif_obj, net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 440 | if (ret) |
| 441 | goto free_if; |
| 442 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 443 | hard_iface->if_num = -1; |
| 444 | hard_iface->net_dev = net_dev; |
| 445 | hard_iface->soft_iface = NULL; |
| 446 | hard_iface->if_status = IF_NOT_IN_USE; |
| 447 | INIT_LIST_HEAD(&hard_iface->list); |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 448 | /* extra reference for return */ |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 449 | atomic_set(&hard_iface->refcount, 2); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 450 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 451 | check_known_mac_addr(hard_iface->net_dev); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 452 | list_add_tail_rcu(&hard_iface->list, &hardif_list); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 453 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 454 | return hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 455 | |
| 456 | free_if: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 457 | kfree(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 458 | release_dev: |
| 459 | dev_put(net_dev); |
| 460 | out: |
| 461 | return NULL; |
| 462 | } |
| 463 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 464 | static void hardif_remove_interface(struct hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 465 | { |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 466 | ASSERT_RTNL(); |
| 467 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 468 | /* first deactivate interface */ |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 469 | if (hard_iface->if_status != IF_NOT_IN_USE) |
| 470 | hardif_disable_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 471 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 472 | if (hard_iface->if_status != IF_NOT_IN_USE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 473 | return; |
| 474 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 475 | hard_iface->if_status = IF_TO_BE_REMOVED; |
| 476 | sysfs_del_hardif(&hard_iface->hardif_obj); |
| 477 | hardif_free_ref(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 478 | } |
| 479 | |
| 480 | void hardif_remove_interfaces(void) |
| 481 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 482 | struct hard_iface *hard_iface, *hard_iface_tmp; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 483 | |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 484 | rtnl_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 485 | list_for_each_entry_safe(hard_iface, hard_iface_tmp, |
| 486 | &hardif_list, list) { |
| 487 | list_del_rcu(&hard_iface->list); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 488 | hardif_remove_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 489 | } |
| 490 | rtnl_unlock(); |
| 491 | } |
| 492 | |
| 493 | static int hard_if_event(struct notifier_block *this, |
| 494 | unsigned long event, void *ptr) |
| 495 | { |
Sven Eckelmann | 5f718c2 | 2011-05-14 23:14:52 +0200 | [diff] [blame] | 496 | struct net_device *net_dev = ptr; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 497 | struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 498 | struct hard_iface *primary_if = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 499 | struct bat_priv *bat_priv; |
| 500 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 501 | if (!hard_iface && event == NETDEV_REGISTER) |
| 502 | hard_iface = hardif_add_interface(net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 503 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 504 | if (!hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 505 | goto out; |
| 506 | |
| 507 | switch (event) { |
| 508 | case NETDEV_UP: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 509 | hardif_activate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 510 | break; |
| 511 | case NETDEV_GOING_DOWN: |
| 512 | case NETDEV_DOWN: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 513 | hardif_deactivate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 514 | break; |
| 515 | case NETDEV_UNREGISTER: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 516 | list_del_rcu(&hard_iface->list); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 517 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 518 | hardif_remove_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 519 | break; |
| 520 | case NETDEV_CHANGEMTU: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 521 | if (hard_iface->soft_iface) |
| 522 | update_min_mtu(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 523 | break; |
| 524 | case NETDEV_CHANGEADDR: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 525 | if (hard_iface->if_status == IF_NOT_IN_USE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 526 | goto hardif_put; |
| 527 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 528 | check_known_mac_addr(hard_iface->net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 529 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 530 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | 01c4224 | 2011-11-28 21:31:55 +0800 | [diff] [blame] | 531 | bat_priv->bat_algo_ops->bat_ogm_update_mac(hard_iface); |
| 532 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 533 | primary_if = primary_if_get_selected(bat_priv); |
| 534 | if (!primary_if) |
| 535 | goto hardif_put; |
| 536 | |
| 537 | if (hard_iface == primary_if) |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame^] | 538 | primary_if_update_addr(bat_priv, NULL); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 539 | break; |
| 540 | default: |
| 541 | break; |
Joe Perches | f81c622 | 2011-06-03 11:51:19 +0000 | [diff] [blame] | 542 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 543 | |
| 544 | hardif_put: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 545 | hardif_free_ref(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 546 | out: |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 547 | if (primary_if) |
| 548 | hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 549 | return NOTIFY_DONE; |
| 550 | } |
| 551 | |
Antonio Quartulli | 015758d | 2011-07-09 17:52:13 +0200 | [diff] [blame] | 552 | /* incoming packets with the batman ethertype received on any active hard |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 553 | * interface */ |
Sven Eckelmann | fb86d76 | 2011-01-27 13:16:08 +0100 | [diff] [blame] | 554 | static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev, |
| 555 | struct packet_type *ptype, |
| 556 | struct net_device *orig_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 557 | { |
| 558 | struct bat_priv *bat_priv; |
Marek Lindner | b6da4bf | 2011-07-29 17:31:50 +0200 | [diff] [blame] | 559 | struct batman_ogm_packet *batman_ogm_packet; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 560 | struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 561 | int ret; |
| 562 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 563 | hard_iface = container_of(ptype, struct hard_iface, batman_adv_ptype); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 564 | skb = skb_share_check(skb, GFP_ATOMIC); |
| 565 | |
| 566 | /* skb was released by skb_share_check() */ |
| 567 | if (!skb) |
| 568 | goto err_out; |
| 569 | |
| 570 | /* packet should hold at least type and version */ |
| 571 | if (unlikely(!pskb_may_pull(skb, 2))) |
| 572 | goto err_free; |
| 573 | |
| 574 | /* expect a valid ethernet header here. */ |
Sven Eckelmann | 7c64fd9 | 2012-02-28 10:55:36 +0100 | [diff] [blame] | 575 | if (unlikely(skb->mac_len != sizeof(struct ethhdr) || |
| 576 | !skb_mac_header(skb))) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 577 | goto err_free; |
| 578 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 579 | if (!hard_iface->soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 580 | goto err_free; |
| 581 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 582 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 583 | |
| 584 | if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE) |
| 585 | goto err_free; |
| 586 | |
| 587 | /* discard frames on not active interfaces */ |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 588 | if (hard_iface->if_status != IF_ACTIVE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 589 | goto err_free; |
| 590 | |
Marek Lindner | b6da4bf | 2011-07-29 17:31:50 +0200 | [diff] [blame] | 591 | batman_ogm_packet = (struct batman_ogm_packet *)skb->data; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 592 | |
Sven Eckelmann | 76543d1 | 2011-11-20 15:47:38 +0100 | [diff] [blame] | 593 | if (batman_ogm_packet->header.version != COMPAT_VERSION) { |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 594 | bat_dbg(DBG_BATMAN, bat_priv, |
| 595 | "Drop packet: incompatible batman version (%i)\n", |
Sven Eckelmann | 76543d1 | 2011-11-20 15:47:38 +0100 | [diff] [blame] | 596 | batman_ogm_packet->header.version); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 597 | goto err_free; |
| 598 | } |
| 599 | |
| 600 | /* all receive handlers return whether they received or reused |
| 601 | * the supplied skb. if not, we have to free the skb. */ |
| 602 | |
Sven Eckelmann | 76543d1 | 2011-11-20 15:47:38 +0100 | [diff] [blame] | 603 | switch (batman_ogm_packet->header.packet_type) { |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 604 | /* batman originator packet */ |
Marek Lindner | b6da4bf | 2011-07-29 17:31:50 +0200 | [diff] [blame] | 605 | case BAT_OGM: |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 606 | ret = recv_bat_ogm_packet(skb, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 607 | break; |
| 608 | |
| 609 | /* batman icmp packet */ |
| 610 | case BAT_ICMP: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 611 | ret = recv_icmp_packet(skb, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 612 | break; |
| 613 | |
| 614 | /* unicast packet */ |
| 615 | case BAT_UNICAST: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 616 | ret = recv_unicast_packet(skb, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 617 | break; |
| 618 | |
| 619 | /* fragmented unicast packet */ |
| 620 | case BAT_UNICAST_FRAG: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 621 | ret = recv_ucast_frag_packet(skb, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 622 | break; |
| 623 | |
| 624 | /* broadcast packet */ |
| 625 | case BAT_BCAST: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 626 | ret = recv_bcast_packet(skb, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 627 | break; |
| 628 | |
| 629 | /* vis packet */ |
| 630 | case BAT_VIS: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 631 | ret = recv_vis_packet(skb, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 632 | break; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 633 | /* Translation table query (request or response) */ |
| 634 | case BAT_TT_QUERY: |
| 635 | ret = recv_tt_query(skb, hard_iface); |
| 636 | break; |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 637 | /* Roaming advertisement */ |
| 638 | case BAT_ROAM_ADV: |
| 639 | ret = recv_roam_adv(skb, hard_iface); |
| 640 | break; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 641 | default: |
| 642 | ret = NET_RX_DROP; |
| 643 | } |
| 644 | |
| 645 | if (ret == NET_RX_DROP) |
| 646 | kfree_skb(skb); |
| 647 | |
| 648 | /* return NET_RX_SUCCESS in any case as we |
| 649 | * most probably dropped the packet for |
| 650 | * routing-logical reasons. */ |
| 651 | |
| 652 | return NET_RX_SUCCESS; |
| 653 | |
| 654 | err_free: |
| 655 | kfree_skb(skb); |
| 656 | err_out: |
| 657 | return NET_RX_DROP; |
| 658 | } |
| 659 | |
Antonio Quartulli | bc27908 | 2011-07-07 15:35:35 +0200 | [diff] [blame] | 660 | /* This function returns true if the interface represented by ifindex is a |
| 661 | * 802.11 wireless device */ |
| 662 | bool is_wifi_iface(int ifindex) |
| 663 | { |
| 664 | struct net_device *net_device = NULL; |
| 665 | bool ret = false; |
| 666 | |
| 667 | if (ifindex == NULL_IFINDEX) |
| 668 | goto out; |
| 669 | |
| 670 | net_device = dev_get_by_index(&init_net, ifindex); |
| 671 | if (!net_device) |
| 672 | goto out; |
| 673 | |
| 674 | #ifdef CONFIG_WIRELESS_EXT |
| 675 | /* pre-cfg80211 drivers have to implement WEXT, so it is possible to |
| 676 | * check for wireless_handlers != NULL */ |
| 677 | if (net_device->wireless_handlers) |
| 678 | ret = true; |
| 679 | else |
| 680 | #endif |
| 681 | /* cfg80211 drivers have to set ieee80211_ptr */ |
| 682 | if (net_device->ieee80211_ptr) |
| 683 | ret = true; |
| 684 | out: |
| 685 | if (net_device) |
| 686 | dev_put(net_device); |
| 687 | return ret; |
| 688 | } |
| 689 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 690 | struct notifier_block hard_if_notifier = { |
| 691 | .notifier_call = hard_if_event, |
| 692 | }; |