Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1 | /* |
Sven Eckelmann | 64afe35 | 2011-01-27 10:38:15 +0100 | [diff] [blame] | 2 | * Copyright (C) 2007-2011 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 | |
| 178 | pr_warning("The newly added mac address (%pM) already exists " |
| 179 | "on: %s\n", net_dev->dev_addr, |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 180 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 181 | pr_warning("It is strongly recommended to keep mac addresses " |
| 182 | "unique to avoid problems!\n"); |
| 183 | } |
| 184 | rcu_read_unlock(); |
| 185 | } |
| 186 | |
| 187 | int hardif_min_mtu(struct net_device *soft_iface) |
| 188 | { |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 189 | const struct bat_priv *bat_priv = netdev_priv(soft_iface); |
| 190 | const struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 191 | /* allow big frames if all devices are capable to do so |
| 192 | * (have MTU > 1500 + BAT_HEADER_LEN) */ |
| 193 | int min_mtu = ETH_DATA_LEN; |
| 194 | |
| 195 | if (atomic_read(&bat_priv->fragmentation)) |
| 196 | goto out; |
| 197 | |
| 198 | rcu_read_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 199 | list_for_each_entry_rcu(hard_iface, &hardif_list, list) { |
| 200 | if ((hard_iface->if_status != IF_ACTIVE) && |
| 201 | (hard_iface->if_status != IF_TO_BE_ACTIVATED)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 202 | continue; |
| 203 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 204 | if (hard_iface->soft_iface != soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 205 | continue; |
| 206 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 207 | 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] | 208 | min_mtu); |
| 209 | } |
| 210 | rcu_read_unlock(); |
| 211 | out: |
| 212 | return min_mtu; |
| 213 | } |
| 214 | |
| 215 | /* adjusts the MTU if a new interface with a smaller MTU appeared. */ |
| 216 | void update_min_mtu(struct net_device *soft_iface) |
| 217 | { |
| 218 | int min_mtu; |
| 219 | |
| 220 | min_mtu = hardif_min_mtu(soft_iface); |
| 221 | if (soft_iface->mtu != min_mtu) |
| 222 | soft_iface->mtu = min_mtu; |
| 223 | } |
| 224 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 225 | static void hardif_activate_interface(struct hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 226 | { |
| 227 | struct bat_priv *bat_priv; |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 228 | struct hard_iface *primary_if = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 229 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 230 | if (hard_iface->if_status != IF_INACTIVE) |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 231 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 232 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 233 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 234 | |
Marek Lindner | 01c4224 | 2011-11-28 21:31:55 +0800 | [diff] [blame^] | 235 | bat_priv->bat_algo_ops->bat_ogm_update_mac(hard_iface); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 236 | hard_iface->if_status = IF_TO_BE_ACTIVATED; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 237 | |
| 238 | /** |
| 239 | * the first active interface becomes our primary interface or |
Antonio Quartulli | 015758d | 2011-07-09 17:52:13 +0200 | [diff] [blame] | 240 | * the next active interface after the old primary interface was removed |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 241 | */ |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 242 | primary_if = primary_if_get_selected(bat_priv); |
| 243 | if (!primary_if) |
| 244 | primary_if_select(bat_priv, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 245 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 246 | bat_info(hard_iface->soft_iface, "Interface activated: %s\n", |
| 247 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 248 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 249 | update_min_mtu(hard_iface->soft_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 250 | |
| 251 | out: |
| 252 | if (primary_if) |
| 253 | hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 254 | } |
| 255 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 256 | static void hardif_deactivate_interface(struct hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 257 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 258 | if ((hard_iface->if_status != IF_ACTIVE) && |
| 259 | (hard_iface->if_status != IF_TO_BE_ACTIVATED)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 260 | return; |
| 261 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 262 | hard_iface->if_status = IF_INACTIVE; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 263 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 264 | bat_info(hard_iface->soft_iface, "Interface deactivated: %s\n", |
| 265 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 266 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 267 | update_min_mtu(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 268 | } |
| 269 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 270 | int hardif_enable_interface(struct hard_iface *hard_iface, |
| 271 | const char *iface_name) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 272 | { |
| 273 | struct bat_priv *bat_priv; |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 274 | struct net_device *soft_iface; |
| 275 | int ret; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 276 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 277 | if (hard_iface->if_status != IF_NOT_IN_USE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 278 | goto out; |
| 279 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 280 | if (!atomic_inc_not_zero(&hard_iface->refcount)) |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 281 | goto out; |
| 282 | |
Marek Lindner | 6e242f9 | 2011-12-07 18:02:50 +0800 | [diff] [blame] | 283 | /* hard-interface is part of a bridge */ |
| 284 | if (hard_iface->net_dev->priv_flags & IFF_BRIDGE_PORT) |
| 285 | pr_err("You are about to enable batman-adv on '%s' which " |
| 286 | "already is part of a bridge. Unless you know exactly " |
| 287 | "what you are doing this is probably wrong and won't " |
| 288 | "work the way you think it would.\n", |
| 289 | hard_iface->net_dev->name); |
| 290 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 291 | soft_iface = dev_get_by_name(&init_net, iface_name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 292 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 293 | if (!soft_iface) { |
| 294 | soft_iface = softif_create(iface_name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 295 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 296 | if (!soft_iface) { |
| 297 | ret = -ENOMEM; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 298 | goto err; |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 299 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 300 | |
| 301 | /* dev_get_by_name() increases the reference counter for us */ |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 302 | dev_hold(soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 303 | } |
| 304 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 305 | if (!softif_is_valid(soft_iface)) { |
| 306 | pr_err("Can't create batman mesh interface %s: " |
| 307 | "already exists as regular interface\n", |
| 308 | soft_iface->name); |
| 309 | dev_put(soft_iface); |
| 310 | ret = -EINVAL; |
| 311 | goto err; |
| 312 | } |
| 313 | |
| 314 | hard_iface->soft_iface = soft_iface; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 315 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 316 | |
Marek Lindner | 01c4224 | 2011-11-28 21:31:55 +0800 | [diff] [blame^] | 317 | bat_priv->bat_algo_ops->bat_ogm_init(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 318 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 319 | if (!hard_iface->packet_buff) { |
| 320 | bat_err(hard_iface->soft_iface, "Can't add interface packet " |
| 321 | "(%s): out of memory\n", hard_iface->net_dev->name); |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 322 | ret = -ENOMEM; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 323 | goto err; |
| 324 | } |
| 325 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 326 | hard_iface->if_num = bat_priv->num_ifaces; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 327 | bat_priv->num_ifaces++; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 328 | hard_iface->if_status = IF_INACTIVE; |
| 329 | orig_hash_add_if(hard_iface, bat_priv->num_ifaces); |
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 | hard_iface->batman_adv_ptype.type = __constant_htons(ETH_P_BATMAN); |
| 332 | hard_iface->batman_adv_ptype.func = batman_skb_recv; |
| 333 | hard_iface->batman_adv_ptype.dev = hard_iface->net_dev; |
| 334 | dev_add_pack(&hard_iface->batman_adv_ptype); |
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 | atomic_set(&hard_iface->seqno, 1); |
| 337 | atomic_set(&hard_iface->frag_seqno, 1); |
| 338 | bat_info(hard_iface->soft_iface, "Adding interface: %s\n", |
| 339 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 340 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 341 | if (atomic_read(&bat_priv->fragmentation) && hard_iface->net_dev->mtu < |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 342 | ETH_DATA_LEN + BAT_HEADER_LEN) |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 343 | bat_info(hard_iface->soft_iface, |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 344 | "The MTU of interface %s is too small (%i) to handle " |
| 345 | "the transport of batman-adv packets. Packets going " |
| 346 | "over this interface will be fragmented on layer2 " |
| 347 | "which could impact the performance. Setting the MTU " |
| 348 | "to %zi would solve the problem.\n", |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 349 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 350 | ETH_DATA_LEN + BAT_HEADER_LEN); |
| 351 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 352 | if (!atomic_read(&bat_priv->fragmentation) && hard_iface->net_dev->mtu < |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 353 | ETH_DATA_LEN + BAT_HEADER_LEN) |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 354 | bat_info(hard_iface->soft_iface, |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 355 | "The MTU of interface %s is too small (%i) to handle " |
| 356 | "the transport of batman-adv packets. If you experience" |
| 357 | " problems getting traffic through try increasing the " |
| 358 | "MTU to %zi.\n", |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 359 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 360 | ETH_DATA_LEN + BAT_HEADER_LEN); |
| 361 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 362 | if (hardif_is_iface_up(hard_iface)) |
| 363 | hardif_activate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 364 | else |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 365 | bat_err(hard_iface->soft_iface, "Not using interface %s " |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 366 | "(retrying later): interface not active\n", |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 367 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 368 | |
| 369 | /* begin scheduling originator messages on that interface */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 370 | schedule_bat_ogm(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 371 | |
| 372 | out: |
| 373 | return 0; |
| 374 | |
| 375 | err: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 376 | hardif_free_ref(hard_iface); |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 377 | return ret; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 378 | } |
| 379 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 380 | void hardif_disable_interface(struct hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 381 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 382 | struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 383 | struct hard_iface *primary_if = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 384 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 385 | if (hard_iface->if_status == IF_ACTIVE) |
| 386 | hardif_deactivate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 387 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 388 | if (hard_iface->if_status != IF_INACTIVE) |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 389 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 390 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 391 | bat_info(hard_iface->soft_iface, "Removing interface: %s\n", |
| 392 | hard_iface->net_dev->name); |
| 393 | dev_remove_pack(&hard_iface->batman_adv_ptype); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 394 | |
| 395 | bat_priv->num_ifaces--; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 396 | orig_hash_del_if(hard_iface, bat_priv->num_ifaces); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 397 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 398 | primary_if = primary_if_get_selected(bat_priv); |
| 399 | if (hard_iface == primary_if) { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 400 | struct hard_iface *new_if; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 401 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 402 | new_if = hardif_get_active(hard_iface->soft_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 403 | primary_if_select(bat_priv, new_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 404 | |
| 405 | if (new_if) |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 406 | hardif_free_ref(new_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 407 | } |
| 408 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 409 | kfree(hard_iface->packet_buff); |
| 410 | hard_iface->packet_buff = NULL; |
| 411 | hard_iface->if_status = IF_NOT_IN_USE; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 412 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 413 | /* delete all references to this hard_iface */ |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 414 | purge_orig_ref(bat_priv); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 415 | purge_outstanding_packets(bat_priv, hard_iface); |
| 416 | dev_put(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 417 | |
| 418 | /* nobody uses this interface anymore */ |
| 419 | if (!bat_priv->num_ifaces) |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 420 | softif_destroy(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 421 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 422 | hard_iface->soft_iface = NULL; |
| 423 | hardif_free_ref(hard_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 424 | |
| 425 | out: |
| 426 | if (primary_if) |
| 427 | hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 428 | } |
| 429 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 430 | static struct hard_iface *hardif_add_interface(struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 431 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 432 | struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 433 | int ret; |
| 434 | |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 435 | ASSERT_RTNL(); |
| 436 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 437 | ret = is_valid_iface(net_dev); |
| 438 | if (ret != 1) |
| 439 | goto out; |
| 440 | |
| 441 | dev_hold(net_dev); |
| 442 | |
Sven Eckelmann | 704509b | 2011-05-14 23:14:54 +0200 | [diff] [blame] | 443 | hard_iface = kmalloc(sizeof(*hard_iface), GFP_ATOMIC); |
Joe Perches | 320f422 | 2011-08-29 14:17:24 -0700 | [diff] [blame] | 444 | if (!hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 445 | goto release_dev; |
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 | ret = sysfs_add_hardif(&hard_iface->hardif_obj, net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 448 | if (ret) |
| 449 | goto free_if; |
| 450 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 451 | hard_iface->if_num = -1; |
| 452 | hard_iface->net_dev = net_dev; |
| 453 | hard_iface->soft_iface = NULL; |
| 454 | hard_iface->if_status = IF_NOT_IN_USE; |
| 455 | INIT_LIST_HEAD(&hard_iface->list); |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 456 | /* extra reference for return */ |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 457 | atomic_set(&hard_iface->refcount, 2); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 458 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 459 | check_known_mac_addr(hard_iface->net_dev); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 460 | list_add_tail_rcu(&hard_iface->list, &hardif_list); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 461 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 462 | return hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 463 | |
| 464 | free_if: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 465 | kfree(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 466 | release_dev: |
| 467 | dev_put(net_dev); |
| 468 | out: |
| 469 | return NULL; |
| 470 | } |
| 471 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 472 | static void hardif_remove_interface(struct hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 473 | { |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 474 | ASSERT_RTNL(); |
| 475 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 476 | /* first deactivate interface */ |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 477 | if (hard_iface->if_status != IF_NOT_IN_USE) |
| 478 | hardif_disable_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 479 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 480 | if (hard_iface->if_status != IF_NOT_IN_USE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 481 | return; |
| 482 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 483 | hard_iface->if_status = IF_TO_BE_REMOVED; |
| 484 | sysfs_del_hardif(&hard_iface->hardif_obj); |
| 485 | hardif_free_ref(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 486 | } |
| 487 | |
| 488 | void hardif_remove_interfaces(void) |
| 489 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 490 | struct hard_iface *hard_iface, *hard_iface_tmp; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 491 | |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 492 | rtnl_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 493 | list_for_each_entry_safe(hard_iface, hard_iface_tmp, |
| 494 | &hardif_list, list) { |
| 495 | list_del_rcu(&hard_iface->list); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 496 | hardif_remove_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 497 | } |
| 498 | rtnl_unlock(); |
| 499 | } |
| 500 | |
| 501 | static int hard_if_event(struct notifier_block *this, |
| 502 | unsigned long event, void *ptr) |
| 503 | { |
Sven Eckelmann | 5f718c2 | 2011-05-14 23:14:52 +0200 | [diff] [blame] | 504 | struct net_device *net_dev = ptr; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 505 | struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 506 | struct hard_iface *primary_if = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 507 | struct bat_priv *bat_priv; |
| 508 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 509 | if (!hard_iface && event == NETDEV_REGISTER) |
| 510 | hard_iface = hardif_add_interface(net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 511 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 512 | if (!hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 513 | goto out; |
| 514 | |
| 515 | switch (event) { |
| 516 | case NETDEV_UP: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 517 | hardif_activate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 518 | break; |
| 519 | case NETDEV_GOING_DOWN: |
| 520 | case NETDEV_DOWN: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 521 | hardif_deactivate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 522 | break; |
| 523 | case NETDEV_UNREGISTER: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 524 | list_del_rcu(&hard_iface->list); |
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 | hardif_remove_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 527 | break; |
| 528 | case NETDEV_CHANGEMTU: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 529 | if (hard_iface->soft_iface) |
| 530 | update_min_mtu(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 531 | break; |
| 532 | case NETDEV_CHANGEADDR: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 533 | if (hard_iface->if_status == IF_NOT_IN_USE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 534 | goto hardif_put; |
| 535 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 536 | check_known_mac_addr(hard_iface->net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 537 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 538 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | 01c4224 | 2011-11-28 21:31:55 +0800 | [diff] [blame^] | 539 | bat_priv->bat_algo_ops->bat_ogm_update_mac(hard_iface); |
| 540 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 541 | primary_if = primary_if_get_selected(bat_priv); |
| 542 | if (!primary_if) |
| 543 | goto hardif_put; |
| 544 | |
| 545 | if (hard_iface == primary_if) |
| 546 | primary_if_update_addr(bat_priv); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 547 | break; |
| 548 | default: |
| 549 | break; |
Joe Perches | f81c622 | 2011-06-03 11:51:19 +0000 | [diff] [blame] | 550 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 551 | |
| 552 | hardif_put: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 553 | hardif_free_ref(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 554 | out: |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 555 | if (primary_if) |
| 556 | hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 557 | return NOTIFY_DONE; |
| 558 | } |
| 559 | |
Antonio Quartulli | 015758d | 2011-07-09 17:52:13 +0200 | [diff] [blame] | 560 | /* incoming packets with the batman ethertype received on any active hard |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 561 | * interface */ |
Sven Eckelmann | fb86d76 | 2011-01-27 13:16:08 +0100 | [diff] [blame] | 562 | static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev, |
| 563 | struct packet_type *ptype, |
| 564 | struct net_device *orig_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 565 | { |
| 566 | struct bat_priv *bat_priv; |
Marek Lindner | b6da4bf | 2011-07-29 17:31:50 +0200 | [diff] [blame] | 567 | struct batman_ogm_packet *batman_ogm_packet; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 568 | struct hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 569 | int ret; |
| 570 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 571 | hard_iface = container_of(ptype, struct hard_iface, batman_adv_ptype); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 572 | skb = skb_share_check(skb, GFP_ATOMIC); |
| 573 | |
| 574 | /* skb was released by skb_share_check() */ |
| 575 | if (!skb) |
| 576 | goto err_out; |
| 577 | |
| 578 | /* packet should hold at least type and version */ |
| 579 | if (unlikely(!pskb_may_pull(skb, 2))) |
| 580 | goto err_free; |
| 581 | |
| 582 | /* expect a valid ethernet header here. */ |
| 583 | if (unlikely(skb->mac_len != sizeof(struct ethhdr) |
| 584 | || !skb_mac_header(skb))) |
| 585 | goto err_free; |
| 586 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 587 | if (!hard_iface->soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 588 | goto err_free; |
| 589 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 590 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 591 | |
| 592 | if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE) |
| 593 | goto err_free; |
| 594 | |
| 595 | /* discard frames on not active interfaces */ |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 596 | if (hard_iface->if_status != IF_ACTIVE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 597 | goto err_free; |
| 598 | |
Marek Lindner | b6da4bf | 2011-07-29 17:31:50 +0200 | [diff] [blame] | 599 | batman_ogm_packet = (struct batman_ogm_packet *)skb->data; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 600 | |
Sven Eckelmann | 76543d1 | 2011-11-20 15:47:38 +0100 | [diff] [blame] | 601 | if (batman_ogm_packet->header.version != COMPAT_VERSION) { |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 602 | bat_dbg(DBG_BATMAN, bat_priv, |
| 603 | "Drop packet: incompatible batman version (%i)\n", |
Sven Eckelmann | 76543d1 | 2011-11-20 15:47:38 +0100 | [diff] [blame] | 604 | batman_ogm_packet->header.version); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 605 | goto err_free; |
| 606 | } |
| 607 | |
| 608 | /* all receive handlers return whether they received or reused |
| 609 | * the supplied skb. if not, we have to free the skb. */ |
| 610 | |
Sven Eckelmann | 76543d1 | 2011-11-20 15:47:38 +0100 | [diff] [blame] | 611 | switch (batman_ogm_packet->header.packet_type) { |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 612 | /* batman originator packet */ |
Marek Lindner | b6da4bf | 2011-07-29 17:31:50 +0200 | [diff] [blame] | 613 | case BAT_OGM: |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 614 | ret = recv_bat_ogm_packet(skb, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 615 | break; |
| 616 | |
| 617 | /* batman icmp packet */ |
| 618 | case BAT_ICMP: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 619 | ret = recv_icmp_packet(skb, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 620 | break; |
| 621 | |
| 622 | /* unicast packet */ |
| 623 | case BAT_UNICAST: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 624 | ret = recv_unicast_packet(skb, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 625 | break; |
| 626 | |
| 627 | /* fragmented unicast packet */ |
| 628 | case BAT_UNICAST_FRAG: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 629 | ret = recv_ucast_frag_packet(skb, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 630 | break; |
| 631 | |
| 632 | /* broadcast packet */ |
| 633 | case BAT_BCAST: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 634 | ret = recv_bcast_packet(skb, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 635 | break; |
| 636 | |
| 637 | /* vis packet */ |
| 638 | case BAT_VIS: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 639 | ret = recv_vis_packet(skb, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 640 | break; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 641 | /* Translation table query (request or response) */ |
| 642 | case BAT_TT_QUERY: |
| 643 | ret = recv_tt_query(skb, hard_iface); |
| 644 | break; |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 645 | /* Roaming advertisement */ |
| 646 | case BAT_ROAM_ADV: |
| 647 | ret = recv_roam_adv(skb, hard_iface); |
| 648 | break; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 649 | default: |
| 650 | ret = NET_RX_DROP; |
| 651 | } |
| 652 | |
| 653 | if (ret == NET_RX_DROP) |
| 654 | kfree_skb(skb); |
| 655 | |
| 656 | /* return NET_RX_SUCCESS in any case as we |
| 657 | * most probably dropped the packet for |
| 658 | * routing-logical reasons. */ |
| 659 | |
| 660 | return NET_RX_SUCCESS; |
| 661 | |
| 662 | err_free: |
| 663 | kfree_skb(skb); |
| 664 | err_out: |
| 665 | return NET_RX_DROP; |
| 666 | } |
| 667 | |
Antonio Quartulli | bc27908 | 2011-07-07 15:35:35 +0200 | [diff] [blame] | 668 | /* This function returns true if the interface represented by ifindex is a |
| 669 | * 802.11 wireless device */ |
| 670 | bool is_wifi_iface(int ifindex) |
| 671 | { |
| 672 | struct net_device *net_device = NULL; |
| 673 | bool ret = false; |
| 674 | |
| 675 | if (ifindex == NULL_IFINDEX) |
| 676 | goto out; |
| 677 | |
| 678 | net_device = dev_get_by_index(&init_net, ifindex); |
| 679 | if (!net_device) |
| 680 | goto out; |
| 681 | |
| 682 | #ifdef CONFIG_WIRELESS_EXT |
| 683 | /* pre-cfg80211 drivers have to implement WEXT, so it is possible to |
| 684 | * check for wireless_handlers != NULL */ |
| 685 | if (net_device->wireless_handlers) |
| 686 | ret = true; |
| 687 | else |
| 688 | #endif |
| 689 | /* cfg80211 drivers have to set ieee80211_ptr */ |
| 690 | if (net_device->ieee80211_ptr) |
| 691 | ret = true; |
| 692 | out: |
| 693 | if (net_device) |
| 694 | dev_put(net_device); |
| 695 | return ret; |
| 696 | } |
| 697 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 698 | struct notifier_block hard_if_notifier = { |
| 699 | .notifier_call = hard_if_event, |
| 700 | }; |