Antonio Quartulli | 0b87393 | 2013-01-04 03:05:31 +0100 | [diff] [blame] | 1 | /* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 2 | * |
| 3 | * Marek Lindner, Simon Wunderlich |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of version 2 of the GNU General Public |
| 7 | * License as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 17 | * 02110-1301, USA |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 18 | */ |
| 19 | |
| 20 | #include "main.h" |
Antonio Quartulli | 785ea11 | 2011-11-23 11:35:44 +0100 | [diff] [blame] | 21 | #include "distributed-arp-table.h" |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 22 | #include "hard-interface.h" |
| 23 | #include "soft-interface.h" |
| 24 | #include "send.h" |
| 25 | #include "translation-table.h" |
| 26 | #include "routing.h" |
Sven Eckelmann | b706b13 | 2012-06-10 23:58:51 +0200 | [diff] [blame] | 27 | #include "sysfs.h" |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 28 | #include "originator.h" |
| 29 | #include "hash.h" |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame] | 30 | #include "bridge_loop_avoidance.h" |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 31 | |
| 32 | #include <linux/if_arp.h> |
Antonio Quartulli | af5d4f7 | 2012-11-26 00:38:50 +0100 | [diff] [blame] | 33 | #include <linux/if_ether.h> |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 34 | |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 35 | void batadv_hardif_free_rcu(struct rcu_head *rcu) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 36 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 37 | struct batadv_hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 38 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 39 | hard_iface = container_of(rcu, struct batadv_hard_iface, rcu); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 40 | dev_put(hard_iface->net_dev); |
| 41 | kfree(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 42 | } |
| 43 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 44 | struct batadv_hard_iface * |
| 45 | batadv_hardif_get_by_netdev(const struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 46 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 47 | struct batadv_hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 48 | |
| 49 | rcu_read_lock(); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 50 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 51 | if (hard_iface->net_dev == net_dev && |
| 52 | atomic_inc_not_zero(&hard_iface->refcount)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 53 | goto out; |
| 54 | } |
| 55 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 56 | hard_iface = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 57 | |
| 58 | out: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 59 | rcu_read_unlock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 60 | return hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 61 | } |
| 62 | |
Antonio Quartulli | b7eddd0 | 2012-09-09 10:46:46 +0200 | [diff] [blame] | 63 | /** |
| 64 | * batadv_is_on_batman_iface - check if a device is a batman iface descendant |
| 65 | * @net_dev: the device to check |
| 66 | * |
| 67 | * If the user creates any virtual device on top of a batman-adv interface, it |
| 68 | * is important to prevent this new interface to be used to create a new mesh |
| 69 | * network (this behaviour would lead to a batman-over-batman configuration). |
| 70 | * This function recursively checks all the fathers of the device passed as |
| 71 | * argument looking for a batman-adv soft interface. |
| 72 | * |
| 73 | * Returns true if the device is descendant of a batman-adv mesh interface (or |
| 74 | * if it is a batman-adv interface itself), false otherwise |
| 75 | */ |
| 76 | static bool batadv_is_on_batman_iface(const struct net_device *net_dev) |
| 77 | { |
| 78 | struct net_device *parent_dev; |
| 79 | bool ret; |
| 80 | |
| 81 | /* check if this is a batman-adv mesh interface */ |
| 82 | if (batadv_softif_is_valid(net_dev)) |
| 83 | return true; |
| 84 | |
| 85 | /* no more parents..stop recursion */ |
| 86 | if (net_dev->iflink == net_dev->ifindex) |
| 87 | return false; |
| 88 | |
| 89 | /* recurse over the parent device */ |
| 90 | parent_dev = dev_get_by_index(&init_net, net_dev->iflink); |
| 91 | /* if we got a NULL parent_dev there is something broken.. */ |
| 92 | if (WARN(!parent_dev, "Cannot find parent device")) |
| 93 | return false; |
| 94 | |
| 95 | ret = batadv_is_on_batman_iface(parent_dev); |
| 96 | |
| 97 | if (parent_dev) |
| 98 | dev_put(parent_dev); |
| 99 | return ret; |
| 100 | } |
| 101 | |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 102 | static int batadv_is_valid_iface(const struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 103 | { |
| 104 | if (net_dev->flags & IFF_LOOPBACK) |
| 105 | return 0; |
| 106 | |
| 107 | if (net_dev->type != ARPHRD_ETHER) |
| 108 | return 0; |
| 109 | |
| 110 | if (net_dev->addr_len != ETH_ALEN) |
| 111 | return 0; |
| 112 | |
| 113 | /* no batman over batman */ |
Antonio Quartulli | b7eddd0 | 2012-09-09 10:46:46 +0200 | [diff] [blame] | 114 | if (batadv_is_on_batman_iface(net_dev)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 115 | return 0; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 116 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 117 | return 1; |
| 118 | } |
| 119 | |
Matthias Schiffer | de68d10 | 2013-03-09 23:14:22 +0100 | [diff] [blame] | 120 | /** |
| 121 | * batadv_is_wifi_netdev - check if the given net_device struct is a wifi |
| 122 | * interface |
| 123 | * @net_device: the device to check |
| 124 | * |
| 125 | * Returns true if the net device is a 802.11 wireless device, false otherwise. |
| 126 | */ |
| 127 | static bool batadv_is_wifi_netdev(struct net_device *net_device) |
| 128 | { |
| 129 | #ifdef CONFIG_WIRELESS_EXT |
| 130 | /* pre-cfg80211 drivers have to implement WEXT, so it is possible to |
| 131 | * check for wireless_handlers != NULL |
| 132 | */ |
| 133 | if (net_device->wireless_handlers) |
| 134 | return true; |
| 135 | #endif |
| 136 | |
| 137 | /* cfg80211 drivers have to set ieee80211_ptr */ |
| 138 | if (net_device->ieee80211_ptr) |
| 139 | return true; |
| 140 | |
| 141 | return false; |
| 142 | } |
| 143 | |
| 144 | /** |
| 145 | * batadv_is_wifi_iface - check if the given interface represented by ifindex |
| 146 | * is a wifi interface |
| 147 | * @ifindex: interface index to check |
| 148 | * |
| 149 | * Returns true if the interface represented by ifindex is a 802.11 wireless |
| 150 | * device, false otherwise. |
| 151 | */ |
| 152 | bool batadv_is_wifi_iface(int ifindex) |
| 153 | { |
| 154 | struct net_device *net_device = NULL; |
| 155 | bool ret = false; |
| 156 | |
| 157 | if (ifindex == BATADV_NULL_IFINDEX) |
| 158 | goto out; |
| 159 | |
| 160 | net_device = dev_get_by_index(&init_net, ifindex); |
| 161 | if (!net_device) |
| 162 | goto out; |
| 163 | |
| 164 | ret = batadv_is_wifi_netdev(net_device); |
| 165 | |
| 166 | out: |
| 167 | if (net_device) |
| 168 | dev_put(net_device); |
| 169 | return ret; |
| 170 | } |
| 171 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 172 | static struct batadv_hard_iface * |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 173 | batadv_hardif_get_active(const struct net_device *soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 174 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 175 | struct batadv_hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 176 | |
| 177 | rcu_read_lock(); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 178 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 179 | if (hard_iface->soft_iface != soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 180 | continue; |
| 181 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 182 | if (hard_iface->if_status == BATADV_IF_ACTIVE && |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 183 | atomic_inc_not_zero(&hard_iface->refcount)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 184 | goto out; |
| 185 | } |
| 186 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 187 | hard_iface = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 188 | |
| 189 | out: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 190 | rcu_read_unlock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 191 | return hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 192 | } |
| 193 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 194 | static void batadv_primary_if_update_addr(struct batadv_priv *bat_priv, |
| 195 | struct batadv_hard_iface *oldif) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 196 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 197 | struct batadv_hard_iface *primary_if; |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 198 | |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 199 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 200 | if (!primary_if) |
| 201 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 202 | |
Antonio Quartulli | 785ea11 | 2011-11-23 11:35:44 +0100 | [diff] [blame] | 203 | batadv_dat_init_own_addr(bat_priv, primary_if); |
Sven Eckelmann | 08adf15 | 2012-05-12 13:38:47 +0200 | [diff] [blame] | 204 | batadv_bla_update_orig_address(bat_priv, primary_if, oldif); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 205 | out: |
| 206 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 207 | batadv_hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 208 | } |
| 209 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 210 | static void batadv_primary_if_select(struct batadv_priv *bat_priv, |
| 211 | struct batadv_hard_iface *new_hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 212 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 213 | struct batadv_hard_iface *curr_hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 214 | |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 215 | ASSERT_RTNL(); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 216 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 217 | if (new_hard_iface && !atomic_inc_not_zero(&new_hard_iface->refcount)) |
| 218 | new_hard_iface = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 219 | |
Sven Eckelmann | 728cbc6 | 2011-05-15 00:50:21 +0200 | [diff] [blame] | 220 | curr_hard_iface = rcu_dereference_protected(bat_priv->primary_if, 1); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 221 | rcu_assign_pointer(bat_priv->primary_if, new_hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 222 | |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 223 | if (!new_hard_iface) |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame] | 224 | goto out; |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 225 | |
Marek Lindner | cd8b78e | 2012-02-07 17:20:49 +0800 | [diff] [blame] | 226 | bat_priv->bat_algo_ops->bat_primary_iface_set(new_hard_iface); |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 227 | batadv_primary_if_update_addr(bat_priv, curr_hard_iface); |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame] | 228 | |
| 229 | out: |
| 230 | if (curr_hard_iface) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 231 | batadv_hardif_free_ref(curr_hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 232 | } |
| 233 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 234 | static bool |
| 235 | batadv_hardif_is_iface_up(const struct batadv_hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 236 | { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 237 | if (hard_iface->net_dev->flags & IFF_UP) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 238 | return true; |
| 239 | |
| 240 | return false; |
| 241 | } |
| 242 | |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 243 | static void batadv_check_known_mac_addr(const struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 244 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 245 | const struct batadv_hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 246 | |
| 247 | rcu_read_lock(); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 248 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 249 | if ((hard_iface->if_status != BATADV_IF_ACTIVE) && |
| 250 | (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 251 | continue; |
| 252 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 253 | if (hard_iface->net_dev == net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 254 | continue; |
| 255 | |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 256 | if (!batadv_compare_eth(hard_iface->net_dev->dev_addr, |
| 257 | net_dev->dev_addr)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 258 | continue; |
| 259 | |
Sven Eckelmann | 6796958 | 2012-03-26 16:22:45 +0200 | [diff] [blame] | 260 | pr_warn("The newly added mac address (%pM) already exists on: %s\n", |
| 261 | net_dev->dev_addr, hard_iface->net_dev->name); |
| 262 | pr_warn("It is strongly recommended to keep mac addresses unique to avoid problems!\n"); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 263 | } |
| 264 | rcu_read_unlock(); |
| 265 | } |
| 266 | |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 267 | int batadv_hardif_min_mtu(struct net_device *soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 268 | { |
Marek Lindner | a19d3d8 | 2013-05-27 15:33:25 +0800 | [diff] [blame^] | 269 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 270 | const struct batadv_hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 271 | int min_mtu = ETH_DATA_LEN; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 272 | |
| 273 | rcu_read_lock(); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 274 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 275 | if ((hard_iface->if_status != BATADV_IF_ACTIVE) && |
| 276 | (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 277 | continue; |
| 278 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 279 | if (hard_iface->soft_iface != soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 280 | continue; |
| 281 | |
Marek Lindner | a19d3d8 | 2013-05-27 15:33:25 +0800 | [diff] [blame^] | 282 | min_mtu = min_t(int, hard_iface->net_dev->mtu, min_mtu); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 283 | } |
| 284 | rcu_read_unlock(); |
Marek Lindner | a19d3d8 | 2013-05-27 15:33:25 +0800 | [diff] [blame^] | 285 | |
| 286 | atomic_set(&bat_priv->packet_size_max, min_mtu); |
| 287 | |
| 288 | if (atomic_read(&bat_priv->fragmentation) == 0) |
| 289 | goto out; |
| 290 | |
| 291 | /* with fragmentation enabled the maximum size of internally generated |
| 292 | * packets such as translation table exchanges or tvlv containers, etc |
| 293 | * has to be calculated |
| 294 | */ |
| 295 | min_mtu = min_t(int, min_mtu, BATADV_FRAG_MAX_FRAG_SIZE); |
| 296 | min_mtu -= sizeof(struct batadv_frag_packet); |
| 297 | min_mtu *= BATADV_FRAG_MAX_FRAGMENTS; |
| 298 | atomic_set(&bat_priv->packet_size_max, min_mtu); |
| 299 | |
| 300 | /* with fragmentation enabled we can fragment external packets easily */ |
| 301 | min_mtu = min_t(int, min_mtu, ETH_DATA_LEN); |
| 302 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 303 | out: |
Marek Lindner | a19d3d8 | 2013-05-27 15:33:25 +0800 | [diff] [blame^] | 304 | return min_mtu - batadv_max_header_len(); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 305 | } |
| 306 | |
| 307 | /* adjusts the MTU if a new interface with a smaller MTU appeared. */ |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 308 | void batadv_update_min_mtu(struct net_device *soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 309 | { |
Marek Lindner | a19d3d8 | 2013-05-27 15:33:25 +0800 | [diff] [blame^] | 310 | soft_iface->mtu = batadv_hardif_min_mtu(soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 311 | |
Marek Lindner | a19d3d8 | 2013-05-27 15:33:25 +0800 | [diff] [blame^] | 312 | /* Check if the local translate table should be cleaned up to match a |
| 313 | * new (and smaller) MTU. |
| 314 | */ |
| 315 | batadv_tt_local_resize_to_mtu(soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 316 | } |
| 317 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 318 | static void |
| 319 | batadv_hardif_activate_interface(struct batadv_hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 320 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 321 | struct batadv_priv *bat_priv; |
| 322 | struct batadv_hard_iface *primary_if = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 323 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 324 | if (hard_iface->if_status != BATADV_IF_INACTIVE) |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 325 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 326 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 327 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 328 | |
Marek Lindner | c322939 | 2012-03-11 06:17:50 +0800 | [diff] [blame] | 329 | bat_priv->bat_algo_ops->bat_iface_update_mac(hard_iface); |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 330 | hard_iface->if_status = BATADV_IF_TO_BE_ACTIVATED; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 331 | |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 332 | /* the first active interface becomes our primary interface or |
Antonio Quartulli | 015758d | 2011-07-09 17:52:13 +0200 | [diff] [blame] | 333 | * the next active interface after the old primary interface was removed |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 334 | */ |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 335 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 336 | if (!primary_if) |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 337 | batadv_primary_if_select(bat_priv, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 338 | |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 339 | batadv_info(hard_iface->soft_iface, "Interface activated: %s\n", |
| 340 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 341 | |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 342 | batadv_update_min_mtu(hard_iface->soft_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 343 | |
| 344 | out: |
| 345 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 346 | batadv_hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 347 | } |
| 348 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 349 | static void |
| 350 | batadv_hardif_deactivate_interface(struct batadv_hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 351 | { |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 352 | if ((hard_iface->if_status != BATADV_IF_ACTIVE) && |
| 353 | (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 354 | return; |
| 355 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 356 | hard_iface->if_status = BATADV_IF_INACTIVE; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 357 | |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 358 | batadv_info(hard_iface->soft_iface, "Interface deactivated: %s\n", |
| 359 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 360 | |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 361 | batadv_update_min_mtu(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 362 | } |
| 363 | |
Antonio Quartulli | cb4b0d4 | 2013-02-16 14:42:39 +0100 | [diff] [blame] | 364 | /** |
| 365 | * batadv_master_del_slave - remove hard_iface from the current master interface |
| 366 | * @slave: the interface enslaved in another master |
| 367 | * @master: the master from which slave has to be removed |
| 368 | * |
| 369 | * Invoke ndo_del_slave on master passing slave as argument. In this way slave |
| 370 | * is free'd and master can correctly change its internal state. |
| 371 | * Return 0 on success, a negative value representing the error otherwise |
| 372 | */ |
| 373 | static int batadv_master_del_slave(struct batadv_hard_iface *slave, |
| 374 | struct net_device *master) |
| 375 | { |
| 376 | int ret; |
| 377 | |
| 378 | if (!master) |
| 379 | return 0; |
| 380 | |
| 381 | ret = -EBUSY; |
| 382 | if (master->netdev_ops->ndo_del_slave) |
| 383 | ret = master->netdev_ops->ndo_del_slave(master, slave->net_dev); |
| 384 | |
| 385 | return ret; |
| 386 | } |
| 387 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 388 | int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 389 | const char *iface_name) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 390 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 391 | struct batadv_priv *bat_priv; |
Antonio Quartulli | cb4b0d4 | 2013-02-16 14:42:39 +0100 | [diff] [blame] | 392 | struct net_device *soft_iface, *master; |
Antonio Quartulli | 293e933 | 2013-05-19 12:55:16 +0200 | [diff] [blame] | 393 | __be16 ethertype = htons(ETH_P_BATMAN); |
Marek Lindner | 411d6ed | 2013-05-08 13:31:59 +0800 | [diff] [blame] | 394 | int max_header_len = batadv_max_header_len(); |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 395 | int ret; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 396 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 397 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 398 | goto out; |
| 399 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 400 | if (!atomic_inc_not_zero(&hard_iface->refcount)) |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 401 | goto out; |
| 402 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 403 | soft_iface = dev_get_by_name(&init_net, iface_name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 404 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 405 | if (!soft_iface) { |
Sven Eckelmann | 04b482a | 2012-05-12 02:09:38 +0200 | [diff] [blame] | 406 | soft_iface = batadv_softif_create(iface_name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 407 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 408 | if (!soft_iface) { |
| 409 | ret = -ENOMEM; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 410 | goto err; |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 411 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 412 | |
| 413 | /* dev_get_by_name() increases the reference counter for us */ |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 414 | dev_hold(soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 415 | } |
| 416 | |
Sven Eckelmann | 04b482a | 2012-05-12 02:09:38 +0200 | [diff] [blame] | 417 | if (!batadv_softif_is_valid(soft_iface)) { |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 418 | 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] | 419 | soft_iface->name); |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 420 | ret = -EINVAL; |
Marek Lindner | 77af757 | 2012-02-07 17:20:48 +0800 | [diff] [blame] | 421 | goto err_dev; |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 422 | } |
| 423 | |
Antonio Quartulli | cb4b0d4 | 2013-02-16 14:42:39 +0100 | [diff] [blame] | 424 | /* check if the interface is enslaved in another virtual one and |
| 425 | * in that case unlink it first |
| 426 | */ |
| 427 | master = netdev_master_upper_dev_get(hard_iface->net_dev); |
| 428 | ret = batadv_master_del_slave(hard_iface, master); |
| 429 | if (ret) |
| 430 | goto err_dev; |
| 431 | |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 432 | hard_iface->soft_iface = soft_iface; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 433 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 434 | |
Sven Eckelmann | 3dbd550 | 2013-02-11 17:10:27 +0800 | [diff] [blame] | 435 | ret = netdev_master_upper_dev_link(hard_iface->net_dev, soft_iface); |
| 436 | if (ret) |
| 437 | goto err_dev; |
| 438 | |
Marek Lindner | 77af757 | 2012-02-07 17:20:48 +0800 | [diff] [blame] | 439 | ret = bat_priv->bat_algo_ops->bat_iface_enable(hard_iface); |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 440 | if (ret < 0) |
Sven Eckelmann | 3dbd550 | 2013-02-11 17:10:27 +0800 | [diff] [blame] | 441 | goto err_upper; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 442 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 443 | hard_iface->if_num = bat_priv->num_ifaces; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 444 | bat_priv->num_ifaces++; |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 445 | hard_iface->if_status = BATADV_IF_INACTIVE; |
Simon Wunderlich | 6244630 | 2012-07-01 22:51:55 +0200 | [diff] [blame] | 446 | ret = batadv_orig_hash_add_if(hard_iface, bat_priv->num_ifaces); |
| 447 | if (ret < 0) { |
| 448 | bat_priv->bat_algo_ops->bat_iface_disable(hard_iface); |
| 449 | bat_priv->num_ifaces--; |
| 450 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; |
Sven Eckelmann | 3dbd550 | 2013-02-11 17:10:27 +0800 | [diff] [blame] | 451 | goto err_upper; |
Simon Wunderlich | 6244630 | 2012-07-01 22:51:55 +0200 | [diff] [blame] | 452 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 453 | |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 454 | hard_iface->batman_adv_ptype.type = ethertype; |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 455 | hard_iface->batman_adv_ptype.func = batadv_batman_skb_recv; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 456 | hard_iface->batman_adv_ptype.dev = hard_iface->net_dev; |
| 457 | dev_add_pack(&hard_iface->batman_adv_ptype); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 458 | |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 459 | batadv_info(hard_iface->soft_iface, "Adding interface: %s\n", |
| 460 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 461 | |
Sven Eckelmann | 0aca236 | 2012-06-19 20:26:30 +0200 | [diff] [blame] | 462 | if (atomic_read(&bat_priv->fragmentation) && |
Marek Lindner | 411d6ed | 2013-05-08 13:31:59 +0800 | [diff] [blame] | 463 | hard_iface->net_dev->mtu < ETH_DATA_LEN + max_header_len) |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 464 | batadv_info(hard_iface->soft_iface, |
Marek Lindner | 411d6ed | 2013-05-08 13:31:59 +0800 | [diff] [blame] | 465 | "The MTU of interface %s is too small (%i) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to %i would solve the problem.\n", |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 466 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
Marek Lindner | 411d6ed | 2013-05-08 13:31:59 +0800 | [diff] [blame] | 467 | ETH_DATA_LEN + max_header_len); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 468 | |
Sven Eckelmann | 0aca236 | 2012-06-19 20:26:30 +0200 | [diff] [blame] | 469 | if (!atomic_read(&bat_priv->fragmentation) && |
Marek Lindner | 411d6ed | 2013-05-08 13:31:59 +0800 | [diff] [blame] | 470 | hard_iface->net_dev->mtu < ETH_DATA_LEN + max_header_len) |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 471 | batadv_info(hard_iface->soft_iface, |
Marek Lindner | 411d6ed | 2013-05-08 13:31:59 +0800 | [diff] [blame] | 472 | "The MTU of interface %s is too small (%i) to handle the transport of batman-adv packets. If you experience problems getting traffic through try increasing the MTU to %i.\n", |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 473 | hard_iface->net_dev->name, hard_iface->net_dev->mtu, |
Marek Lindner | 411d6ed | 2013-05-08 13:31:59 +0800 | [diff] [blame] | 474 | ETH_DATA_LEN + max_header_len); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 475 | |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 476 | if (batadv_hardif_is_iface_up(hard_iface)) |
| 477 | batadv_hardif_activate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 478 | else |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 479 | batadv_err(hard_iface->soft_iface, |
| 480 | "Not using interface %s (retrying later): interface not active\n", |
| 481 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 482 | |
| 483 | /* begin scheduling originator messages on that interface */ |
Sven Eckelmann | 9455e34 | 2012-05-12 02:09:37 +0200 | [diff] [blame] | 484 | batadv_schedule_bat_ogm(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 485 | |
| 486 | out: |
| 487 | return 0; |
| 488 | |
Sven Eckelmann | 3dbd550 | 2013-02-11 17:10:27 +0800 | [diff] [blame] | 489 | err_upper: |
| 490 | netdev_upper_dev_unlink(hard_iface->net_dev, soft_iface); |
Marek Lindner | 77af757 | 2012-02-07 17:20:48 +0800 | [diff] [blame] | 491 | err_dev: |
Sven Eckelmann | 3dbd550 | 2013-02-11 17:10:27 +0800 | [diff] [blame] | 492 | hard_iface->soft_iface = NULL; |
Marek Lindner | 77af757 | 2012-02-07 17:20:48 +0800 | [diff] [blame] | 493 | dev_put(soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 494 | err: |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 495 | batadv_hardif_free_ref(hard_iface); |
Sven Eckelmann | e44d8fe | 2011-03-04 21:36:41 +0000 | [diff] [blame] | 496 | return ret; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 497 | } |
| 498 | |
Sven Eckelmann | a15fd36 | 2013-02-11 17:10:24 +0800 | [diff] [blame] | 499 | void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface, |
| 500 | enum batadv_hard_if_cleanup autodel) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 501 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 502 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
| 503 | struct batadv_hard_iface *primary_if = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 504 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 505 | if (hard_iface->if_status == BATADV_IF_ACTIVE) |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 506 | batadv_hardif_deactivate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 507 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 508 | if (hard_iface->if_status != BATADV_IF_INACTIVE) |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 509 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 510 | |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 511 | batadv_info(hard_iface->soft_iface, "Removing interface: %s\n", |
| 512 | hard_iface->net_dev->name); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 513 | dev_remove_pack(&hard_iface->batman_adv_ptype); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 514 | |
| 515 | bat_priv->num_ifaces--; |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 516 | batadv_orig_hash_del_if(hard_iface, bat_priv->num_ifaces); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 517 | |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 518 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 519 | if (hard_iface == primary_if) { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 520 | struct batadv_hard_iface *new_if; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 521 | |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 522 | new_if = batadv_hardif_get_active(hard_iface->soft_iface); |
| 523 | batadv_primary_if_select(bat_priv, new_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 524 | |
| 525 | if (new_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 526 | batadv_hardif_free_ref(new_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 527 | } |
| 528 | |
Marek Lindner | 00a5007 | 2012-02-07 17:20:47 +0800 | [diff] [blame] | 529 | bat_priv->bat_algo_ops->bat_iface_disable(hard_iface); |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 530 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 531 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 532 | /* delete all references to this hard_iface */ |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 533 | batadv_purge_orig_ref(bat_priv); |
Sven Eckelmann | 9455e34 | 2012-05-12 02:09:37 +0200 | [diff] [blame] | 534 | batadv_purge_outstanding_packets(bat_priv, hard_iface); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 535 | dev_put(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 536 | |
| 537 | /* nobody uses this interface anymore */ |
Sven Eckelmann | a15fd36 | 2013-02-11 17:10:24 +0800 | [diff] [blame] | 538 | if (!bat_priv->num_ifaces && autodel == BATADV_IF_CLEANUP_AUTO) |
Marek Lindner | e07932a | 2013-02-11 17:10:25 +0800 | [diff] [blame] | 539 | batadv_softif_destroy_sysfs(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 540 | |
Sven Eckelmann | 3dbd550 | 2013-02-11 17:10:27 +0800 | [diff] [blame] | 541 | netdev_upper_dev_unlink(hard_iface->net_dev, hard_iface->soft_iface); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 542 | hard_iface->soft_iface = NULL; |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 543 | batadv_hardif_free_ref(hard_iface); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 544 | |
| 545 | out: |
| 546 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 547 | batadv_hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 548 | } |
| 549 | |
Simon Wunderlich | 5bc44dc | 2013-01-11 10:19:51 +0100 | [diff] [blame] | 550 | /** |
| 551 | * batadv_hardif_remove_interface_finish - cleans up the remains of a hardif |
| 552 | * @work: work queue item |
| 553 | * |
| 554 | * Free the parts of the hard interface which can not be removed under |
| 555 | * rtnl lock (to prevent deadlock situations). |
| 556 | */ |
| 557 | static void batadv_hardif_remove_interface_finish(struct work_struct *work) |
| 558 | { |
| 559 | struct batadv_hard_iface *hard_iface; |
| 560 | |
| 561 | hard_iface = container_of(work, struct batadv_hard_iface, |
| 562 | cleanup_work); |
| 563 | |
| 564 | batadv_sysfs_del_hardif(&hard_iface->hardif_obj); |
| 565 | batadv_hardif_free_ref(hard_iface); |
| 566 | } |
| 567 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 568 | static struct batadv_hard_iface * |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 569 | batadv_hardif_add_interface(struct net_device *net_dev) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 570 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 571 | struct batadv_hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 572 | int ret; |
| 573 | |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 574 | ASSERT_RTNL(); |
| 575 | |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 576 | ret = batadv_is_valid_iface(net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 577 | if (ret != 1) |
| 578 | goto out; |
| 579 | |
| 580 | dev_hold(net_dev); |
| 581 | |
Antonio Quartulli | 7db3fc2 | 2013-04-02 12:16:53 +0200 | [diff] [blame] | 582 | hard_iface = kzalloc(sizeof(*hard_iface), GFP_ATOMIC); |
Joe Perches | 320f422 | 2011-08-29 14:17:24 -0700 | [diff] [blame] | 583 | if (!hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 584 | goto release_dev; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 585 | |
Sven Eckelmann | 5853e22 | 2012-05-12 02:09:24 +0200 | [diff] [blame] | 586 | ret = batadv_sysfs_add_hardif(&hard_iface->hardif_obj, net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 587 | if (ret) |
| 588 | goto free_if; |
| 589 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 590 | hard_iface->if_num = -1; |
| 591 | hard_iface->net_dev = net_dev; |
| 592 | hard_iface->soft_iface = NULL; |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 593 | hard_iface->if_status = BATADV_IF_NOT_IN_USE; |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 594 | INIT_LIST_HEAD(&hard_iface->list); |
Simon Wunderlich | 5bc44dc | 2013-01-11 10:19:51 +0100 | [diff] [blame] | 595 | INIT_WORK(&hard_iface->cleanup_work, |
| 596 | batadv_hardif_remove_interface_finish); |
| 597 | |
Matthias Schiffer | caf65bf | 2013-03-09 23:14:23 +0100 | [diff] [blame] | 598 | hard_iface->num_bcasts = BATADV_NUM_BCASTS_DEFAULT; |
| 599 | if (batadv_is_wifi_netdev(net_dev)) |
| 600 | hard_iface->num_bcasts = BATADV_NUM_BCASTS_WIRELESS; |
| 601 | |
Marek Lindner | ed75ccb | 2011-02-10 14:33:51 +0000 | [diff] [blame] | 602 | /* extra reference for return */ |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 603 | atomic_set(&hard_iface->refcount, 2); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 604 | |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 605 | batadv_check_known_mac_addr(hard_iface->net_dev); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 606 | list_add_tail_rcu(&hard_iface->list, &batadv_hardif_list); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 607 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 608 | return hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 609 | |
| 610 | free_if: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 611 | kfree(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 612 | release_dev: |
| 613 | dev_put(net_dev); |
| 614 | out: |
| 615 | return NULL; |
| 616 | } |
| 617 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 618 | static void batadv_hardif_remove_interface(struct batadv_hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 619 | { |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 620 | ASSERT_RTNL(); |
| 621 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 622 | /* first deactivate interface */ |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 623 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
Sven Eckelmann | a15fd36 | 2013-02-11 17:10:24 +0800 | [diff] [blame] | 624 | batadv_hardif_disable_interface(hard_iface, |
| 625 | BATADV_IF_CLEANUP_AUTO); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 626 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 627 | if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 628 | return; |
| 629 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 630 | hard_iface->if_status = BATADV_IF_TO_BE_REMOVED; |
Simon Wunderlich | 5bc44dc | 2013-01-11 10:19:51 +0100 | [diff] [blame] | 631 | queue_work(batadv_event_workqueue, &hard_iface->cleanup_work); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 632 | } |
| 633 | |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 634 | void batadv_hardif_remove_interfaces(void) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 635 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 636 | struct batadv_hard_iface *hard_iface, *hard_iface_tmp; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 637 | |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 638 | rtnl_lock(); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 639 | list_for_each_entry_safe(hard_iface, hard_iface_tmp, |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 640 | &batadv_hardif_list, list) { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 641 | list_del_rcu(&hard_iface->list); |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 642 | batadv_hardif_remove_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 643 | } |
| 644 | rtnl_unlock(); |
| 645 | } |
| 646 | |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 647 | static int batadv_hard_if_event(struct notifier_block *this, |
| 648 | unsigned long event, void *ptr) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 649 | { |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 650 | struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 651 | struct batadv_hard_iface *hard_iface; |
| 652 | struct batadv_hard_iface *primary_if = NULL; |
| 653 | struct batadv_priv *bat_priv; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 654 | |
Sven Eckelmann | 3713029 | 2013-02-11 17:10:22 +0800 | [diff] [blame] | 655 | if (batadv_softif_is_valid(net_dev) && event == NETDEV_REGISTER) { |
| 656 | batadv_sysfs_add_meshif(net_dev); |
Antonio Quartulli | 5d2c05b | 2013-07-02 11:04:34 +0200 | [diff] [blame] | 657 | bat_priv = netdev_priv(net_dev); |
| 658 | batadv_softif_create_vlan(bat_priv, BATADV_NO_FLAGS); |
Sven Eckelmann | 3713029 | 2013-02-11 17:10:22 +0800 | [diff] [blame] | 659 | return NOTIFY_DONE; |
| 660 | } |
| 661 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 662 | hard_iface = batadv_hardif_get_by_netdev(net_dev); |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 663 | if (!hard_iface && event == NETDEV_REGISTER) |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 664 | hard_iface = batadv_hardif_add_interface(net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 665 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 666 | if (!hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 667 | goto out; |
| 668 | |
| 669 | switch (event) { |
| 670 | case NETDEV_UP: |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 671 | batadv_hardif_activate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 672 | break; |
| 673 | case NETDEV_GOING_DOWN: |
| 674 | case NETDEV_DOWN: |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 675 | batadv_hardif_deactivate_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 676 | break; |
| 677 | case NETDEV_UNREGISTER: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 678 | list_del_rcu(&hard_iface->list); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 679 | |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 680 | batadv_hardif_remove_interface(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 681 | break; |
| 682 | case NETDEV_CHANGEMTU: |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 683 | if (hard_iface->soft_iface) |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 684 | batadv_update_min_mtu(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 685 | break; |
| 686 | case NETDEV_CHANGEADDR: |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 687 | if (hard_iface->if_status == BATADV_IF_NOT_IN_USE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 688 | goto hardif_put; |
| 689 | |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 690 | batadv_check_known_mac_addr(hard_iface->net_dev); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 691 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 692 | bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | c322939 | 2012-03-11 06:17:50 +0800 | [diff] [blame] | 693 | bat_priv->bat_algo_ops->bat_iface_update_mac(hard_iface); |
Marek Lindner | 01c4224 | 2011-11-28 21:31:55 +0800 | [diff] [blame] | 694 | |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 695 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 696 | if (!primary_if) |
| 697 | goto hardif_put; |
| 698 | |
| 699 | if (hard_iface == primary_if) |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 700 | batadv_primary_if_update_addr(bat_priv, NULL); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 701 | break; |
| 702 | default: |
| 703 | break; |
Joe Perches | f81c622 | 2011-06-03 11:51:19 +0000 | [diff] [blame] | 704 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 705 | |
| 706 | hardif_put: |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 707 | batadv_hardif_free_ref(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 708 | out: |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 709 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 710 | batadv_hardif_free_ref(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 711 | return NOTIFY_DONE; |
| 712 | } |
| 713 | |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 714 | struct notifier_block batadv_hard_if_notifier = { |
Sven Eckelmann | 18a1cb6 | 2012-05-12 18:33:57 +0200 | [diff] [blame] | 715 | .notifier_call = batadv_hard_if_event, |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 716 | }; |