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" |
| 31 | |
| 32 | #include <linux/if_arp.h> |
| 33 | |
Sven Eckelmann | fb86d76 | 2011-01-27 13:16:08 +0100 | [diff] [blame] | 34 | |
| 35 | static int batman_skb_recv(struct sk_buff *skb, |
| 36 | struct net_device *dev, |
| 37 | struct packet_type *ptype, |
| 38 | struct net_device *orig_dev); |
| 39 | |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 40 | void hardif_free_rcu(struct rcu_head *rcu) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 41 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 42 | struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 43 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 44 | hard_iface = container_of(rcu, struct hard_iface, rcu); |
| 45 | dev_put(hard_iface->net_dev); |
| 46 | kfree(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 47 | } |
| 48 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 49 | 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] | 50 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 51 | struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 52 | |
| 53 | rcu_read_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 54 | list_for_each_entry_rcu(hard_iface, &hardif_list, list) { |
| 55 | if (hard_iface->net_dev == net_dev && |
| 56 | atomic_inc_not_zero(&hard_iface->refcount)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 57 | goto out; |
| 58 | } |
| 59 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 60 | hard_iface = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 61 | |
| 62 | out: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 63 | rcu_read_unlock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 64 | return hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 65 | } |
| 66 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 67 | static int is_valid_iface(const struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 68 | { |
| 69 | if (net_dev->flags & IFF_LOOPBACK) |
| 70 | return 0; |
| 71 | |
| 72 | if (net_dev->type != ARPHRD_ETHER) |
| 73 | return 0; |
| 74 | |
| 75 | if (net_dev->addr_len != ETH_ALEN) |
| 76 | return 0; |
| 77 | |
| 78 | /* no batman over batman */ |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 79 | if (softif_is_valid(net_dev)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 80 | return 0; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 81 | |
| 82 | /* Device is being bridged */ |
| 83 | /* if (net_dev->priv_flags & IFF_BRIDGE_PORT) |
| 84 | return 0; */ |
| 85 | |
| 86 | return 1; |
| 87 | } |
| 88 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 89 | 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] | 90 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 91 | struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 92 | |
| 93 | rcu_read_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 94 | list_for_each_entry_rcu(hard_iface, &hardif_list, list) { |
| 95 | if (hard_iface->soft_iface != soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 96 | continue; |
| 97 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 98 | if (hard_iface->if_status == IF_ACTIVE && |
| 99 | atomic_inc_not_zero(&hard_iface->refcount)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 100 | goto out; |
| 101 | } |
| 102 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 103 | hard_iface = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 104 | |
| 105 | out: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 106 | rcu_read_unlock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 107 | return hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 108 | } |
| 109 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 110 | static void primary_if_update_addr(struct bat_priv *bat_priv) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 111 | { |
| 112 | struct vis_packet *vis_packet; |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 113 | struct hard_iface *primary_if; |
| 114 | |
| 115 | primary_if = primary_if_get_selected(bat_priv); |
| 116 | if (!primary_if) |
| 117 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 118 | |
| 119 | vis_packet = (struct vis_packet *) |
| 120 | bat_priv->my_vis_info->skb_packet->data; |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 121 | 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] | 122 | memcpy(vis_packet->sender_orig, |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 123 | primary_if->net_dev->dev_addr, ETH_ALEN); |
| 124 | |
| 125 | out: |
| 126 | if (primary_if) |
| 127 | hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 128 | } |
| 129 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 130 | static void primary_if_select(struct bat_priv *bat_priv, |
| 131 | struct hard_iface *new_hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 132 | { |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 133 | struct hard_iface *curr_hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 134 | |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 135 | ASSERT_RTNL(); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 136 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 137 | if (new_hard_iface && !atomic_inc_not_zero(&new_hard_iface->refcount)) |
| 138 | new_hard_iface = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 139 | |
Sven Eckelmann | 728cbc6 | 2011-05-15 00:50:21 +0200 | [diff] [blame] | 140 | curr_hard_iface = rcu_dereference_protected(bat_priv->primary_if, 1); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 141 | rcu_assign_pointer(bat_priv->primary_if, new_hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 142 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 143 | if (curr_hard_iface) |
| 144 | hardif_free_ref(curr_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) |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 147 | return; |
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); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 150 | primary_if_update_addr(bat_priv); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 151 | } |
| 152 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 153 | static bool hardif_is_iface_up(const struct hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 154 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 155 | if (hard_iface->net_dev->flags & IFF_UP) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 156 | return true; |
| 157 | |
| 158 | return false; |
| 159 | } |
| 160 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 161 | static void check_known_mac_addr(const struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 162 | { |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 163 | const struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 164 | |
| 165 | rcu_read_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 166 | list_for_each_entry_rcu(hard_iface, &hardif_list, list) { |
| 167 | if ((hard_iface->if_status != IF_ACTIVE) && |
| 168 | (hard_iface->if_status != IF_TO_BE_ACTIVATED)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 169 | continue; |
| 170 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 171 | if (hard_iface->net_dev == net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 172 | continue; |
| 173 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 174 | if (!compare_eth(hard_iface->net_dev->dev_addr, |
| 175 | net_dev->dev_addr)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 176 | continue; |
| 177 | |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 178 | pr_warning("The newly added mac address (%pM) already exists on: %s\n", |
| 179 | net_dev->dev_addr, hard_iface->net_dev->name); |
| 180 | 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] | 181 | } |
| 182 | rcu_read_unlock(); |
| 183 | } |
| 184 | |
| 185 | int hardif_min_mtu(struct net_device *soft_iface) |
| 186 | { |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 187 | const struct bat_priv *bat_priv = netdev_priv(soft_iface); |
| 188 | const struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 189 | /* allow big frames if all devices are capable to do so |
| 190 | * (have MTU > 1500 + BAT_HEADER_LEN) */ |
| 191 | int min_mtu = ETH_DATA_LEN; |
| 192 | |
| 193 | if (atomic_read(&bat_priv->fragmentation)) |
| 194 | goto out; |
| 195 | |
| 196 | rcu_read_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 197 | list_for_each_entry_rcu(hard_iface, &hardif_list, list) { |
| 198 | if ((hard_iface->if_status != IF_ACTIVE) && |
| 199 | (hard_iface->if_status != IF_TO_BE_ACTIVATED)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 200 | continue; |
| 201 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 202 | if (hard_iface->soft_iface != soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 203 | continue; |
| 204 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 205 | 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] | 206 | min_mtu); |
| 207 | } |
| 208 | rcu_read_unlock(); |
| 209 | out: |
| 210 | return min_mtu; |
| 211 | } |
| 212 | |
| 213 | /* adjusts the MTU if a new interface with a smaller MTU appeared. */ |
| 214 | void update_min_mtu(struct net_device *soft_iface) |
| 215 | { |
| 216 | int min_mtu; |
| 217 | |
| 218 | min_mtu = hardif_min_mtu(soft_iface); |
| 219 | if (soft_iface->mtu != min_mtu) |
| 220 | soft_iface->mtu = min_mtu; |
| 221 | } |
| 222 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 223 | static void hardif_activate_interface(struct hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 224 | { |
| 225 | struct bat_priv *bat_priv; |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 226 | struct hard_iface *primary_if = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 227 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 228 | if (hard_iface->if_status != IF_INACTIVE) |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 229 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 230 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 231 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 232 | |
Marek Lindner | 01c4224 | 2011-11-28 21:31:55 +0800 | [diff] [blame] | 233 | bat_priv->bat_algo_ops->bat_ogm_update_mac(hard_iface); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 234 | hard_iface->if_status = IF_TO_BE_ACTIVATED; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 235 | |
| 236 | /** |
| 237 | * the first active interface becomes our primary interface or |
Antonio Quartulli | 015758d | 2011-07-09 17:52:13 +0200 | [diff] [blame] | 238 | * the next active interface after the old primary interface was removed |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 239 | */ |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 240 | primary_if = primary_if_get_selected(bat_priv); |
| 241 | if (!primary_if) |
| 242 | primary_if_select(bat_priv, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 243 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 244 | bat_info(hard_iface->soft_iface, "Interface activated: %s\n", |
| 245 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 246 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 247 | update_min_mtu(hard_iface->soft_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 248 | |
| 249 | out: |
| 250 | if (primary_if) |
| 251 | hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 252 | } |
| 253 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 254 | static void hardif_deactivate_interface(struct hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 255 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 256 | if ((hard_iface->if_status != IF_ACTIVE) && |
| 257 | (hard_iface->if_status != IF_TO_BE_ACTIVATED)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 258 | return; |
| 259 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 260 | hard_iface->if_status = IF_INACTIVE; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 261 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 262 | bat_info(hard_iface->soft_iface, "Interface deactivated: %s\n", |
| 263 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 264 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 265 | update_min_mtu(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 266 | } |
| 267 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 268 | int hardif_enable_interface(struct hard_iface *hard_iface, |
| 269 | const char *iface_name) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 270 | { |
| 271 | struct bat_priv *bat_priv; |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 272 | struct net_device *soft_iface; |
| 273 | int ret; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 274 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 275 | if (hard_iface->if_status != IF_NOT_IN_USE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 276 | goto out; |
| 277 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 278 | if (!atomic_inc_not_zero(&hard_iface->refcount)) |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 279 | goto out; |
| 280 | |
Marek Lindner | 6e242f9 | 2011-12-07 18:02:50 +0800 | [diff] [blame] | 281 | /* hard-interface is part of a bridge */ |
| 282 | if (hard_iface->net_dev->priv_flags & IFF_BRIDGE_PORT) |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 283 | 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] | 284 | hard_iface->net_dev->name); |
| 285 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 286 | soft_iface = dev_get_by_name(&init_net, iface_name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 287 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 288 | if (!soft_iface) { |
| 289 | soft_iface = softif_create(iface_name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 290 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 291 | if (!soft_iface) { |
| 292 | ret = -ENOMEM; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 293 | goto err; |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 294 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 295 | |
| 296 | /* dev_get_by_name() increases the reference counter for us */ |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 297 | dev_hold(soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 298 | } |
| 299 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 300 | if (!softif_is_valid(soft_iface)) { |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 301 | 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] | 302 | soft_iface->name); |
| 303 | dev_put(soft_iface); |
| 304 | ret = -EINVAL; |
| 305 | goto err; |
| 306 | } |
| 307 | |
| 308 | hard_iface->soft_iface = soft_iface; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 309 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 310 | |
Marek Lindner | 01c4224 | 2011-11-28 21:31:55 +0800 | [diff] [blame] | 311 | bat_priv->bat_algo_ops->bat_ogm_init(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 312 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 313 | if (!hard_iface->packet_buff) { |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 314 | bat_err(hard_iface->soft_iface, |
| 315 | "Can't add interface packet (%s): out of memory\n", |
| 316 | hard_iface->net_dev->name); |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 317 | ret = -ENOMEM; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 318 | goto err; |
| 319 | } |
| 320 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 321 | hard_iface->if_num = bat_priv->num_ifaces; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 322 | bat_priv->num_ifaces++; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 323 | hard_iface->if_status = IF_INACTIVE; |
| 324 | orig_hash_add_if(hard_iface, bat_priv->num_ifaces); |
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 | hard_iface->batman_adv_ptype.type = __constant_htons(ETH_P_BATMAN); |
| 327 | hard_iface->batman_adv_ptype.func = batman_skb_recv; |
| 328 | hard_iface->batman_adv_ptype.dev = hard_iface->net_dev; |
| 329 | dev_add_pack(&hard_iface->batman_adv_ptype); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 330 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 331 | atomic_set(&hard_iface->seqno, 1); |
| 332 | atomic_set(&hard_iface->frag_seqno, 1); |
| 333 | bat_info(hard_iface->soft_iface, "Adding interface: %s\n", |
| 334 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 335 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 336 | if (atomic_read(&bat_priv->fragmentation) && hard_iface->net_dev->mtu < |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 337 | ETH_DATA_LEN + BAT_HEADER_LEN) |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 338 | bat_info(hard_iface->soft_iface, |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 339 | "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] | 340 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
| 341 | ETH_DATA_LEN + BAT_HEADER_LEN); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 342 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 343 | if (!atomic_read(&bat_priv->fragmentation) && hard_iface->net_dev->mtu < |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 344 | ETH_DATA_LEN + BAT_HEADER_LEN) |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 345 | bat_info(hard_iface->soft_iface, |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 346 | "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] | 347 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
| 348 | ETH_DATA_LEN + BAT_HEADER_LEN); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 349 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 350 | if (hardif_is_iface_up(hard_iface)) |
| 351 | hardif_activate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 352 | else |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 353 | bat_err(hard_iface->soft_iface, |
| 354 | "Not using interface %s (retrying later): interface not active\n", |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 355 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 356 | |
| 357 | /* begin scheduling originator messages on that interface */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 358 | schedule_bat_ogm(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 359 | |
| 360 | out: |
| 361 | return 0; |
| 362 | |
| 363 | err: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 364 | hardif_free_ref(hard_iface); |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 365 | return ret; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 366 | } |
| 367 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 368 | void hardif_disable_interface(struct hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 369 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 370 | struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 371 | struct hard_iface *primary_if = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 372 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 373 | if (hard_iface->if_status == IF_ACTIVE) |
| 374 | hardif_deactivate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 375 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 376 | if (hard_iface->if_status != IF_INACTIVE) |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 377 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 378 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 379 | bat_info(hard_iface->soft_iface, "Removing interface: %s\n", |
| 380 | hard_iface->net_dev->name); |
| 381 | dev_remove_pack(&hard_iface->batman_adv_ptype); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 382 | |
| 383 | bat_priv->num_ifaces--; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 384 | orig_hash_del_if(hard_iface, bat_priv->num_ifaces); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 385 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 386 | primary_if = primary_if_get_selected(bat_priv); |
| 387 | if (hard_iface == primary_if) { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 388 | struct hard_iface *new_if; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 389 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 390 | new_if = hardif_get_active(hard_iface->soft_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 391 | primary_if_select(bat_priv, new_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 392 | |
| 393 | if (new_if) |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 394 | hardif_free_ref(new_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 395 | } |
| 396 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 397 | kfree(hard_iface->packet_buff); |
| 398 | hard_iface->packet_buff = NULL; |
| 399 | hard_iface->if_status = IF_NOT_IN_USE; |
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 | /* delete all references to this hard_iface */ |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 402 | purge_orig_ref(bat_priv); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 403 | purge_outstanding_packets(bat_priv, hard_iface); |
| 404 | dev_put(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 405 | |
| 406 | /* nobody uses this interface anymore */ |
| 407 | if (!bat_priv->num_ifaces) |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 408 | softif_destroy(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 409 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 410 | hard_iface->soft_iface = NULL; |
| 411 | hardif_free_ref(hard_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 412 | |
| 413 | out: |
| 414 | if (primary_if) |
| 415 | hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 416 | } |
| 417 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 418 | static struct hard_iface *hardif_add_interface(struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 419 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 420 | struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 421 | int ret; |
| 422 | |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 423 | ASSERT_RTNL(); |
| 424 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 425 | ret = is_valid_iface(net_dev); |
| 426 | if (ret != 1) |
| 427 | goto out; |
| 428 | |
| 429 | dev_hold(net_dev); |
| 430 | |
Sven Eckelmann | 704509b | 2011-05-14 23:14:54 +0200 | [diff] [blame] | 431 | hard_iface = kmalloc(sizeof(*hard_iface), GFP_ATOMIC); |
Joe Perches | 320f422 | 2011-08-29 14:17:24 -0700 | [diff] [blame] | 432 | if (!hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 433 | goto release_dev; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 434 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 435 | ret = sysfs_add_hardif(&hard_iface->hardif_obj, net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 436 | if (ret) |
| 437 | goto free_if; |
| 438 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 439 | hard_iface->if_num = -1; |
| 440 | hard_iface->net_dev = net_dev; |
| 441 | hard_iface->soft_iface = NULL; |
| 442 | hard_iface->if_status = IF_NOT_IN_USE; |
| 443 | INIT_LIST_HEAD(&hard_iface->list); |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 444 | /* extra reference for return */ |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 445 | atomic_set(&hard_iface->refcount, 2); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 446 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 447 | check_known_mac_addr(hard_iface->net_dev); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 448 | list_add_tail_rcu(&hard_iface->list, &hardif_list); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 449 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 450 | return hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 451 | |
| 452 | free_if: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 453 | kfree(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 454 | release_dev: |
| 455 | dev_put(net_dev); |
| 456 | out: |
| 457 | return NULL; |
| 458 | } |
| 459 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 460 | static void hardif_remove_interface(struct hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 461 | { |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 462 | ASSERT_RTNL(); |
| 463 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 464 | /* first deactivate interface */ |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 465 | if (hard_iface->if_status != IF_NOT_IN_USE) |
| 466 | hardif_disable_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 467 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 468 | if (hard_iface->if_status != IF_NOT_IN_USE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 469 | return; |
| 470 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 471 | hard_iface->if_status = IF_TO_BE_REMOVED; |
| 472 | sysfs_del_hardif(&hard_iface->hardif_obj); |
| 473 | hardif_free_ref(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 474 | } |
| 475 | |
| 476 | void hardif_remove_interfaces(void) |
| 477 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 478 | struct hard_iface *hard_iface, *hard_iface_tmp; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 479 | |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 480 | rtnl_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 481 | list_for_each_entry_safe(hard_iface, hard_iface_tmp, |
| 482 | &hardif_list, list) { |
| 483 | list_del_rcu(&hard_iface->list); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 484 | hardif_remove_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 485 | } |
| 486 | rtnl_unlock(); |
| 487 | } |
| 488 | |
| 489 | static int hard_if_event(struct notifier_block *this, |
| 490 | unsigned long event, void *ptr) |
| 491 | { |
Sven Eckelmann | 5f718c2 | 2011-05-14 23:14:52 +0200 | [diff] [blame] | 492 | struct net_device *net_dev = ptr; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 493 | struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 494 | struct hard_iface *primary_if = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 495 | struct bat_priv *bat_priv; |
| 496 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 497 | if (!hard_iface && event == NETDEV_REGISTER) |
| 498 | hard_iface = hardif_add_interface(net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 499 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 500 | if (!hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 501 | goto out; |
| 502 | |
| 503 | switch (event) { |
| 504 | case NETDEV_UP: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 505 | hardif_activate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 506 | break; |
| 507 | case NETDEV_GOING_DOWN: |
| 508 | case NETDEV_DOWN: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 509 | hardif_deactivate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 510 | break; |
| 511 | case NETDEV_UNREGISTER: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 512 | list_del_rcu(&hard_iface->list); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 513 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 514 | hardif_remove_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 515 | break; |
| 516 | case NETDEV_CHANGEMTU: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 517 | if (hard_iface->soft_iface) |
| 518 | update_min_mtu(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 519 | break; |
| 520 | case NETDEV_CHANGEADDR: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 521 | if (hard_iface->if_status == IF_NOT_IN_USE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 522 | goto hardif_put; |
| 523 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 524 | check_known_mac_addr(hard_iface->net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 525 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 526 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | 01c4224 | 2011-11-28 21:31:55 +0800 | [diff] [blame] | 527 | bat_priv->bat_algo_ops->bat_ogm_update_mac(hard_iface); |
| 528 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 529 | primary_if = primary_if_get_selected(bat_priv); |
| 530 | if (!primary_if) |
| 531 | goto hardif_put; |
| 532 | |
| 533 | if (hard_iface == primary_if) |
| 534 | primary_if_update_addr(bat_priv); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 535 | break; |
| 536 | default: |
| 537 | break; |
Joe Perches | f81c622 | 2011-06-03 11:51:19 +0000 | [diff] [blame] | 538 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 539 | |
| 540 | hardif_put: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 541 | hardif_free_ref(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 542 | out: |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 543 | if (primary_if) |
| 544 | hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 545 | return NOTIFY_DONE; |
| 546 | } |
| 547 | |
Antonio Quartulli | 015758d | 2011-07-09 17:52:13 +0200 | [diff] [blame] | 548 | /* incoming packets with the batman ethertype received on any active hard |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 549 | * interface */ |
Sven Eckelmann | fb86d76 | 2011-01-27 13:16:08 +0100 | [diff] [blame] | 550 | static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev, |
| 551 | struct packet_type *ptype, |
| 552 | struct net_device *orig_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 553 | { |
| 554 | struct bat_priv *bat_priv; |
Marek Lindner | b6da4bf | 2011-07-29 17:31:50 +0200 | [diff] [blame] | 555 | struct batman_ogm_packet *batman_ogm_packet; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 556 | struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 557 | int ret; |
| 558 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 559 | hard_iface = container_of(ptype, struct hard_iface, batman_adv_ptype); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 560 | skb = skb_share_check(skb, GFP_ATOMIC); |
| 561 | |
| 562 | /* skb was released by skb_share_check() */ |
| 563 | if (!skb) |
| 564 | goto err_out; |
| 565 | |
| 566 | /* packet should hold at least type and version */ |
| 567 | if (unlikely(!pskb_may_pull(skb, 2))) |
| 568 | goto err_free; |
| 569 | |
| 570 | /* expect a valid ethernet header here. */ |
Sven Eckelmann | 7c64fd9 | 2012-02-28 10:55:36 +0100 | [diff] [blame] | 571 | if (unlikely(skb->mac_len != sizeof(struct ethhdr) || |
| 572 | !skb_mac_header(skb))) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 573 | goto err_free; |
| 574 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 575 | if (!hard_iface->soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 576 | goto err_free; |
| 577 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 578 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 579 | |
| 580 | if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE) |
| 581 | goto err_free; |
| 582 | |
| 583 | /* discard frames on not active interfaces */ |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 584 | if (hard_iface->if_status != IF_ACTIVE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 585 | goto err_free; |
| 586 | |
Marek Lindner | b6da4bf | 2011-07-29 17:31:50 +0200 | [diff] [blame] | 587 | batman_ogm_packet = (struct batman_ogm_packet *)skb->data; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 588 | |
Sven Eckelmann | 76543d1 | 2011-11-20 15:47:38 +0100 | [diff] [blame] | 589 | if (batman_ogm_packet->header.version != COMPAT_VERSION) { |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 590 | bat_dbg(DBG_BATMAN, bat_priv, |
| 591 | "Drop packet: incompatible batman version (%i)\n", |
Sven Eckelmann | 76543d1 | 2011-11-20 15:47:38 +0100 | [diff] [blame] | 592 | batman_ogm_packet->header.version); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 593 | goto err_free; |
| 594 | } |
| 595 | |
| 596 | /* all receive handlers return whether they received or reused |
| 597 | * the supplied skb. if not, we have to free the skb. */ |
| 598 | |
Sven Eckelmann | 76543d1 | 2011-11-20 15:47:38 +0100 | [diff] [blame] | 599 | switch (batman_ogm_packet->header.packet_type) { |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 600 | /* batman originator packet */ |
Marek Lindner | b6da4bf | 2011-07-29 17:31:50 +0200 | [diff] [blame] | 601 | case BAT_OGM: |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 602 | ret = recv_bat_ogm_packet(skb, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 603 | break; |
| 604 | |
| 605 | /* batman icmp packet */ |
| 606 | case BAT_ICMP: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 607 | ret = recv_icmp_packet(skb, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 608 | break; |
| 609 | |
| 610 | /* unicast packet */ |
| 611 | case BAT_UNICAST: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 612 | ret = recv_unicast_packet(skb, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 613 | break; |
| 614 | |
| 615 | /* fragmented unicast packet */ |
| 616 | case BAT_UNICAST_FRAG: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 617 | ret = recv_ucast_frag_packet(skb, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 618 | break; |
| 619 | |
| 620 | /* broadcast packet */ |
| 621 | case BAT_BCAST: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 622 | ret = recv_bcast_packet(skb, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 623 | break; |
| 624 | |
| 625 | /* vis packet */ |
| 626 | case BAT_VIS: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 627 | ret = recv_vis_packet(skb, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 628 | break; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 629 | /* Translation table query (request or response) */ |
| 630 | case BAT_TT_QUERY: |
| 631 | ret = recv_tt_query(skb, hard_iface); |
| 632 | break; |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 633 | /* Roaming advertisement */ |
| 634 | case BAT_ROAM_ADV: |
| 635 | ret = recv_roam_adv(skb, hard_iface); |
| 636 | break; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 637 | default: |
| 638 | ret = NET_RX_DROP; |
| 639 | } |
| 640 | |
| 641 | if (ret == NET_RX_DROP) |
| 642 | kfree_skb(skb); |
| 643 | |
| 644 | /* return NET_RX_SUCCESS in any case as we |
| 645 | * most probably dropped the packet for |
| 646 | * routing-logical reasons. */ |
| 647 | |
| 648 | return NET_RX_SUCCESS; |
| 649 | |
| 650 | err_free: |
| 651 | kfree_skb(skb); |
| 652 | err_out: |
| 653 | return NET_RX_DROP; |
| 654 | } |
| 655 | |
Antonio Quartulli | bc27908 | 2011-07-07 15:35:35 +0200 | [diff] [blame] | 656 | /* This function returns true if the interface represented by ifindex is a |
| 657 | * 802.11 wireless device */ |
| 658 | bool is_wifi_iface(int ifindex) |
| 659 | { |
| 660 | struct net_device *net_device = NULL; |
| 661 | bool ret = false; |
| 662 | |
| 663 | if (ifindex == NULL_IFINDEX) |
| 664 | goto out; |
| 665 | |
| 666 | net_device = dev_get_by_index(&init_net, ifindex); |
| 667 | if (!net_device) |
| 668 | goto out; |
| 669 | |
| 670 | #ifdef CONFIG_WIRELESS_EXT |
| 671 | /* pre-cfg80211 drivers have to implement WEXT, so it is possible to |
| 672 | * check for wireless_handlers != NULL */ |
| 673 | if (net_device->wireless_handlers) |
| 674 | ret = true; |
| 675 | else |
| 676 | #endif |
| 677 | /* cfg80211 drivers have to set ieee80211_ptr */ |
| 678 | if (net_device->ieee80211_ptr) |
| 679 | ret = true; |
| 680 | out: |
| 681 | if (net_device) |
| 682 | dev_put(net_device); |
| 683 | return ret; |
| 684 | } |
| 685 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 686 | struct notifier_block hard_if_notifier = { |
| 687 | .notifier_call = hard_if_event, |
| 688 | }; |