Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1 | /* |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 2 | * Interface handling (except master interface) |
| 3 | * |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 4 | * Copyright 2002-2005, Instant802 Networks, Inc. |
| 5 | * Copyright 2005-2006, Devicescape Software, Inc. |
| 6 | * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 7 | * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | */ |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/if_arp.h> |
| 15 | #include <linux/netdevice.h> |
| 16 | #include <linux/rtnetlink.h> |
| 17 | #include <net/mac80211.h> |
| 18 | #include "ieee80211_i.h" |
| 19 | #include "sta_info.h" |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 20 | #include "debugfs_netdev.h" |
Luis Carlos Cobo | ee38585 | 2008-02-23 15:17:11 +0100 | [diff] [blame] | 21 | #include "mesh.h" |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 22 | #include "led.h" |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 23 | #include "driver-ops.h" |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 24 | |
Johannes Berg | c771c9d | 2009-01-23 22:54:03 +0100 | [diff] [blame] | 25 | /** |
| 26 | * DOC: Interface list locking |
| 27 | * |
| 28 | * The interface list in each struct ieee80211_local is protected |
| 29 | * three-fold: |
| 30 | * |
| 31 | * (1) modifications may only be done under the RTNL |
| 32 | * (2) modifications and readers are protected against each other by |
| 33 | * the iflist_mtx. |
| 34 | * (3) modifications are done in an RCU manner so atomic readers |
| 35 | * can traverse the list in RCU-safe blocks. |
| 36 | * |
| 37 | * As a consequence, reads (traversals) of the list can be protected |
| 38 | * by either the RTNL, the iflist_mtx or RCU. |
| 39 | */ |
| 40 | |
| 41 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 42 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
| 43 | { |
| 44 | int meshhdrlen; |
| 45 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 46 | |
| 47 | meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0; |
| 48 | |
| 49 | /* FIX: what would be proper limits for MTU? |
| 50 | * This interface uses 802.3 frames. */ |
| 51 | if (new_mtu < 256 || |
| 52 | new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { |
| 53 | return -EINVAL; |
| 54 | } |
| 55 | |
| 56 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 57 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); |
| 58 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
| 59 | dev->mtu = new_mtu; |
| 60 | return 0; |
| 61 | } |
| 62 | |
| 63 | static inline int identical_mac_addr_allowed(int type1, int type2) |
| 64 | { |
| 65 | return type1 == NL80211_IFTYPE_MONITOR || |
| 66 | type2 == NL80211_IFTYPE_MONITOR || |
| 67 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || |
| 68 | (type1 == NL80211_IFTYPE_WDS && |
| 69 | (type2 == NL80211_IFTYPE_WDS || |
| 70 | type2 == NL80211_IFTYPE_AP)) || |
| 71 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || |
| 72 | (type1 == NL80211_IFTYPE_AP_VLAN && |
| 73 | (type2 == NL80211_IFTYPE_AP || |
| 74 | type2 == NL80211_IFTYPE_AP_VLAN)); |
| 75 | } |
| 76 | |
| 77 | static int ieee80211_open(struct net_device *dev) |
| 78 | { |
Johannes Berg | b4a4bf5 | 2008-09-26 13:34:54 +0200 | [diff] [blame] | 79 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 80 | struct ieee80211_sub_if_data *nsdata; |
| 81 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 82 | struct sta_info *sta; |
| 83 | struct ieee80211_if_init_conf conf; |
| 84 | u32 changed = 0; |
| 85 | int res; |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 86 | u32 hw_reconf_flags = 0; |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 87 | u8 null_addr[ETH_ALEN] = {0}; |
| 88 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 89 | /* fail early if user set an invalid address */ |
| 90 | if (compare_ether_addr(dev->dev_addr, null_addr) && |
| 91 | !is_valid_ether_addr(dev->dev_addr)) |
| 92 | return -EADDRNOTAVAIL; |
| 93 | |
| 94 | /* we hold the RTNL here so can safely walk the list */ |
| 95 | list_for_each_entry(nsdata, &local->interfaces, list) { |
| 96 | struct net_device *ndev = nsdata->dev; |
| 97 | |
| 98 | if (ndev != dev && netif_running(ndev)) { |
| 99 | /* |
| 100 | * Allow only a single IBSS interface to be up at any |
| 101 | * time. This is restricted because beacon distribution |
| 102 | * cannot work properly if both are in the same IBSS. |
| 103 | * |
| 104 | * To remove this restriction we'd have to disallow them |
| 105 | * from setting the same SSID on different IBSS interfaces |
| 106 | * belonging to the same hardware. Then, however, we're |
| 107 | * faced with having to adopt two different TSF timers... |
| 108 | */ |
| 109 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
| 110 | nsdata->vif.type == NL80211_IFTYPE_ADHOC) |
| 111 | return -EBUSY; |
| 112 | |
| 113 | /* |
| 114 | * The remaining checks are only performed for interfaces |
| 115 | * with the same MAC address. |
| 116 | */ |
| 117 | if (compare_ether_addr(dev->dev_addr, ndev->dev_addr)) |
| 118 | continue; |
| 119 | |
| 120 | /* |
| 121 | * check whether it may have the same address |
| 122 | */ |
| 123 | if (!identical_mac_addr_allowed(sdata->vif.type, |
| 124 | nsdata->vif.type)) |
| 125 | return -ENOTUNIQ; |
| 126 | |
| 127 | /* |
| 128 | * can only add VLANs to enabled APs |
| 129 | */ |
| 130 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
| 131 | nsdata->vif.type == NL80211_IFTYPE_AP) |
| 132 | sdata->bss = &nsdata->u.ap; |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | switch (sdata->vif.type) { |
| 137 | case NL80211_IFTYPE_WDS: |
| 138 | if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) |
| 139 | return -ENOLINK; |
| 140 | break; |
| 141 | case NL80211_IFTYPE_AP_VLAN: |
| 142 | if (!sdata->bss) |
| 143 | return -ENOLINK; |
| 144 | list_add(&sdata->u.vlan.list, &sdata->bss->vlans); |
| 145 | break; |
| 146 | case NL80211_IFTYPE_AP: |
| 147 | sdata->bss = &sdata->u.ap; |
| 148 | break; |
| 149 | case NL80211_IFTYPE_MESH_POINT: |
| 150 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
| 151 | break; |
| 152 | /* mesh ifaces must set allmulti to forward mcast traffic */ |
| 153 | atomic_inc(&local->iff_allmultis); |
| 154 | break; |
| 155 | case NL80211_IFTYPE_STATION: |
| 156 | case NL80211_IFTYPE_MONITOR: |
| 157 | case NL80211_IFTYPE_ADHOC: |
| 158 | /* no special treatment */ |
| 159 | break; |
| 160 | case NL80211_IFTYPE_UNSPECIFIED: |
| 161 | case __NL80211_IFTYPE_AFTER_LAST: |
| 162 | /* cannot happen */ |
| 163 | WARN_ON(1); |
| 164 | break; |
| 165 | } |
| 166 | |
| 167 | if (local->open_count == 0) { |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 168 | res = drv_start(local); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 169 | if (res) |
| 170 | goto err_del_bss; |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 171 | /* we're brought up, everything changes */ |
| 172 | hw_reconf_flags = ~0; |
Johannes Berg | 1f87f7d | 2009-06-02 13:01:41 +0200 | [diff] [blame] | 173 | ieee80211_led_radio(local, true); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | /* |
| 177 | * Check all interfaces and copy the hopefully now-present |
| 178 | * MAC address to those that have the special null one. |
| 179 | */ |
| 180 | list_for_each_entry(nsdata, &local->interfaces, list) { |
| 181 | struct net_device *ndev = nsdata->dev; |
| 182 | |
| 183 | /* |
| 184 | * No need to check netif_running since we do not allow |
| 185 | * it to start up with this invalid address. |
| 186 | */ |
| 187 | if (compare_ether_addr(null_addr, ndev->dev_addr) == 0) |
| 188 | memcpy(ndev->dev_addr, |
| 189 | local->hw.wiphy->perm_addr, |
| 190 | ETH_ALEN); |
| 191 | } |
| 192 | |
| 193 | if (compare_ether_addr(null_addr, local->mdev->dev_addr) == 0) |
| 194 | memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, |
| 195 | ETH_ALEN); |
| 196 | |
| 197 | /* |
| 198 | * Validate the MAC address for this device. |
| 199 | */ |
| 200 | if (!is_valid_ether_addr(dev->dev_addr)) { |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 201 | if (!local->open_count) |
| 202 | drv_stop(local); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 203 | return -EADDRNOTAVAIL; |
| 204 | } |
| 205 | |
| 206 | switch (sdata->vif.type) { |
| 207 | case NL80211_IFTYPE_AP_VLAN: |
| 208 | /* no need to tell driver */ |
| 209 | break; |
| 210 | case NL80211_IFTYPE_MONITOR: |
| 211 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { |
| 212 | local->cooked_mntrs++; |
| 213 | break; |
| 214 | } |
| 215 | |
| 216 | /* must be before the call to ieee80211_configure_filter */ |
| 217 | local->monitors++; |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 218 | if (local->monitors == 1) { |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 219 | local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 220 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_RADIOTAP; |
| 221 | } |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 222 | |
| 223 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) |
| 224 | local->fif_fcsfail++; |
| 225 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) |
| 226 | local->fif_plcpfail++; |
| 227 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) |
| 228 | local->fif_control++; |
| 229 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
| 230 | local->fif_other_bss++; |
| 231 | |
| 232 | netif_addr_lock_bh(local->mdev); |
| 233 | ieee80211_configure_filter(local); |
| 234 | netif_addr_unlock_bh(local->mdev); |
| 235 | break; |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 236 | default: |
| 237 | conf.vif = &sdata->vif; |
| 238 | conf.type = sdata->vif.type; |
| 239 | conf.mac_addr = dev->dev_addr; |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 240 | res = drv_add_interface(local, &conf); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 241 | if (res) |
| 242 | goto err_stop; |
| 243 | |
Andrey Yurovsky | a3c9aa5 | 2008-10-31 14:50:12 -0700 | [diff] [blame] | 244 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
| 245 | local->fif_other_bss++; |
| 246 | netif_addr_lock_bh(local->mdev); |
| 247 | ieee80211_configure_filter(local); |
| 248 | netif_addr_unlock_bh(local->mdev); |
| 249 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 250 | ieee80211_start_mesh(sdata); |
Andrey Yurovsky | a3c9aa5 | 2008-10-31 14:50:12 -0700 | [diff] [blame] | 251 | } |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 252 | changed |= ieee80211_reset_erp_info(sdata); |
| 253 | ieee80211_bss_info_change_notify(sdata, changed); |
| 254 | ieee80211_enable_keys(sdata); |
| 255 | |
Johannes Berg | 7986cf9 | 2009-03-21 17:08:43 +0100 | [diff] [blame] | 256 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 257 | netif_carrier_off(dev); |
| 258 | else |
| 259 | netif_carrier_on(dev); |
| 260 | } |
| 261 | |
| 262 | if (sdata->vif.type == NL80211_IFTYPE_WDS) { |
| 263 | /* Create STA entry for the WDS peer */ |
| 264 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, |
| 265 | GFP_KERNEL); |
| 266 | if (!sta) { |
| 267 | res = -ENOMEM; |
| 268 | goto err_del_interface; |
| 269 | } |
| 270 | |
| 271 | /* no locking required since STA is not live yet */ |
| 272 | sta->flags |= WLAN_STA_AUTHORIZED; |
| 273 | |
| 274 | res = sta_info_insert(sta); |
| 275 | if (res) { |
| 276 | /* STA has been freed */ |
| 277 | goto err_del_interface; |
| 278 | } |
| 279 | } |
| 280 | |
| 281 | if (local->open_count == 0) { |
| 282 | res = dev_open(local->mdev); |
| 283 | WARN_ON(res); |
| 284 | if (res) |
| 285 | goto err_del_interface; |
| 286 | tasklet_enable(&local->tx_pending_tasklet); |
| 287 | tasklet_enable(&local->tasklet); |
| 288 | } |
| 289 | |
| 290 | /* |
| 291 | * set_multicast_list will be invoked by the networking core |
| 292 | * which will check whether any increments here were done in |
| 293 | * error and sync them down to the hardware as filter flags. |
| 294 | */ |
| 295 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) |
| 296 | atomic_inc(&local->iff_allmultis); |
| 297 | |
| 298 | if (sdata->flags & IEEE80211_SDATA_PROMISC) |
| 299 | atomic_inc(&local->iff_promiscs); |
| 300 | |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 301 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
| 302 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 303 | local->open_count++; |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 304 | if (hw_reconf_flags) { |
| 305 | ieee80211_hw_config(local, hw_reconf_flags); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 306 | /* |
| 307 | * set default queue parameters so drivers don't |
| 308 | * need to initialise the hardware if the hardware |
| 309 | * doesn't start up with sane defaults |
| 310 | */ |
| 311 | ieee80211_set_wmm_default(sdata); |
| 312 | } |
| 313 | |
Johannes Berg | 10f644a | 2009-04-16 13:17:25 +0200 | [diff] [blame] | 314 | ieee80211_recalc_ps(local, -1); |
Johannes Berg | 965beda | 2009-04-16 13:17:24 +0200 | [diff] [blame] | 315 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 316 | /* |
| 317 | * ieee80211_sta_work is disabled while network interface |
| 318 | * is down. Therefore, some configuration changes may not |
| 319 | * yet be effective. Trigger execution of ieee80211_sta_work |
| 320 | * to fix this. |
| 321 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 322 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
| 323 | queue_work(local->hw.workqueue, &sdata->u.mgd.work); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 324 | |
| 325 | netif_tx_start_all_queues(dev); |
| 326 | |
| 327 | return 0; |
| 328 | err_del_interface: |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 329 | drv_remove_interface(local, &conf); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 330 | err_stop: |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 331 | if (!local->open_count) |
| 332 | drv_stop(local); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 333 | err_del_bss: |
| 334 | sdata->bss = NULL; |
| 335 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
| 336 | list_del(&sdata->u.vlan.list); |
| 337 | return res; |
| 338 | } |
| 339 | |
| 340 | static int ieee80211_stop(struct net_device *dev) |
| 341 | { |
| 342 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 343 | struct ieee80211_local *local = sdata->local; |
| 344 | struct ieee80211_if_init_conf conf; |
| 345 | struct sta_info *sta; |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 346 | u32 hw_reconf_flags = 0; |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 347 | |
| 348 | /* |
| 349 | * Stop TX on this interface first. |
| 350 | */ |
| 351 | netif_tx_stop_all_queues(dev); |
| 352 | |
| 353 | /* |
| 354 | * Now delete all active aggregation sessions. |
| 355 | */ |
| 356 | rcu_read_lock(); |
| 357 | |
| 358 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
| 359 | if (sta->sdata == sdata) |
Johannes Berg | 2dace10 | 2009-02-10 21:25:52 +0100 | [diff] [blame] | 360 | ieee80211_sta_tear_down_BA_sessions(sta); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 361 | } |
| 362 | |
| 363 | rcu_read_unlock(); |
| 364 | |
| 365 | /* |
| 366 | * Remove all stations associated with this interface. |
| 367 | * |
| 368 | * This must be done before calling ops->remove_interface() |
| 369 | * because otherwise we can later invoke ops->sta_notify() |
| 370 | * whenever the STAs are removed, and that invalidates driver |
| 371 | * assumptions about always getting a vif pointer that is valid |
| 372 | * (because if we remove a STA after ops->remove_interface() |
| 373 | * the driver will have removed the vif info already!) |
| 374 | * |
| 375 | * We could relax this and only unlink the stations from the |
| 376 | * hash table and list but keep them on a per-sdata list that |
| 377 | * will be inserted back again when the interface is brought |
| 378 | * up again, but I don't currently see a use case for that, |
| 379 | * except with WDS which gets a STA entry created when it is |
| 380 | * brought up. |
| 381 | */ |
| 382 | sta_info_flush(local, sdata); |
| 383 | |
| 384 | /* |
| 385 | * Don't count this interface for promisc/allmulti while it |
| 386 | * is down. dev_mc_unsync() will invoke set_multicast_list |
| 387 | * on the master interface which will sync these down to the |
| 388 | * hardware as filter flags. |
| 389 | */ |
| 390 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) |
| 391 | atomic_dec(&local->iff_allmultis); |
| 392 | |
| 393 | if (sdata->flags & IEEE80211_SDATA_PROMISC) |
| 394 | atomic_dec(&local->iff_promiscs); |
| 395 | |
| 396 | dev_mc_unsync(local->mdev, dev); |
Vivek Natarajan | 7cbf0ba | 2008-12-24 00:34:37 -0800 | [diff] [blame] | 397 | del_timer_sync(&local->dynamic_ps_timer); |
| 398 | cancel_work_sync(&local->dynamic_ps_enable_work); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 399 | |
| 400 | /* APs need special treatment */ |
| 401 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
| 402 | struct ieee80211_sub_if_data *vlan, *tmp; |
| 403 | struct beacon_data *old_beacon = sdata->u.ap.beacon; |
| 404 | |
| 405 | /* remove beacon */ |
| 406 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); |
| 407 | synchronize_rcu(); |
| 408 | kfree(old_beacon); |
| 409 | |
| 410 | /* down all dependent devices, that is VLANs */ |
| 411 | list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans, |
| 412 | u.vlan.list) |
| 413 | dev_close(vlan->dev); |
| 414 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); |
| 415 | } |
| 416 | |
| 417 | local->open_count--; |
| 418 | |
| 419 | switch (sdata->vif.type) { |
| 420 | case NL80211_IFTYPE_AP_VLAN: |
| 421 | list_del(&sdata->u.vlan.list); |
| 422 | /* no need to tell driver */ |
| 423 | break; |
| 424 | case NL80211_IFTYPE_MONITOR: |
| 425 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { |
| 426 | local->cooked_mntrs--; |
| 427 | break; |
| 428 | } |
| 429 | |
| 430 | local->monitors--; |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 431 | if (local->monitors == 0) { |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 432 | local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 433 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_RADIOTAP; |
| 434 | } |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 435 | |
| 436 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) |
| 437 | local->fif_fcsfail--; |
| 438 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) |
| 439 | local->fif_plcpfail--; |
| 440 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) |
| 441 | local->fif_control--; |
| 442 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
| 443 | local->fif_other_bss--; |
| 444 | |
| 445 | netif_addr_lock_bh(local->mdev); |
| 446 | ieee80211_configure_filter(local); |
| 447 | netif_addr_unlock_bh(local->mdev); |
| 448 | break; |
| 449 | case NL80211_IFTYPE_STATION: |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 450 | del_timer_sync(&sdata->u.mgd.chswitch_timer); |
| 451 | del_timer_sync(&sdata->u.mgd.timer); |
Johannes Berg | 0e2b628 | 2009-07-13 13:23:39 +0200 | [diff] [blame^] | 452 | del_timer_sync(&sdata->u.mgd.conn_mon_timer); |
| 453 | del_timer_sync(&sdata->u.mgd.bcn_mon_timer); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 454 | /* |
Johannes Berg | 0e2b628 | 2009-07-13 13:23:39 +0200 | [diff] [blame^] | 455 | * If any of the timers fired while we waited for it, it will |
| 456 | * have queued its work. Now the work will be running again |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 457 | * but will not rearm the timer again because it checks |
| 458 | * whether the interface is running, which, at this point, |
| 459 | * it no longer is. |
| 460 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 461 | cancel_work_sync(&sdata->u.mgd.work); |
| 462 | cancel_work_sync(&sdata->u.mgd.chswitch_work); |
Johannes Berg | 0e2b628 | 2009-07-13 13:23:39 +0200 | [diff] [blame^] | 463 | cancel_work_sync(&sdata->u.mgd.monitor_work); |
Kalle Valo | 04de838 | 2009-03-22 21:57:35 +0200 | [diff] [blame] | 464 | cancel_work_sync(&sdata->u.mgd.beacon_loss_work); |
| 465 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 466 | /* |
| 467 | * When we get here, the interface is marked down. |
| 468 | * Call synchronize_rcu() to wait for the RX path |
| 469 | * should it be using the interface and enqueuing |
| 470 | * frames at this very time on another CPU. |
| 471 | */ |
| 472 | synchronize_rcu(); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 473 | skb_queue_purge(&sdata->u.mgd.skb_queue); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 474 | /* fall through */ |
| 475 | case NL80211_IFTYPE_ADHOC: |
| 476 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 477 | del_timer_sync(&sdata->u.ibss.timer); |
| 478 | cancel_work_sync(&sdata->u.ibss.work); |
| 479 | synchronize_rcu(); |
| 480 | skb_queue_purge(&sdata->u.ibss.skb_queue); |
| 481 | } |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 482 | /* fall through */ |
| 483 | case NL80211_IFTYPE_MESH_POINT: |
| 484 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
Andrey Yurovsky | a3c9aa5 | 2008-10-31 14:50:12 -0700 | [diff] [blame] | 485 | /* other_bss and allmulti are always set on mesh |
| 486 | * ifaces */ |
| 487 | local->fif_other_bss--; |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 488 | atomic_dec(&local->iff_allmultis); |
Andrey Yurovsky | a3c9aa5 | 2008-10-31 14:50:12 -0700 | [diff] [blame] | 489 | |
| 490 | netif_addr_lock_bh(local->mdev); |
| 491 | ieee80211_configure_filter(local); |
| 492 | netif_addr_unlock_bh(local->mdev); |
| 493 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 494 | ieee80211_stop_mesh(sdata); |
| 495 | } |
| 496 | /* fall through */ |
| 497 | default: |
| 498 | if (local->scan_sdata == sdata) { |
| 499 | if (!local->ops->hw_scan) |
| 500 | cancel_delayed_work_sync(&local->scan_work); |
| 501 | /* |
| 502 | * The software scan can no longer run now, so we can |
| 503 | * clear out the scan_sdata reference. However, the |
| 504 | * hardware scan may still be running. The complete |
| 505 | * function must be prepared to handle a NULL value. |
| 506 | */ |
| 507 | local->scan_sdata = NULL; |
| 508 | /* |
| 509 | * The memory barrier guarantees that another CPU |
| 510 | * that is hardware-scanning will now see the fact |
| 511 | * that this interface is gone. |
| 512 | */ |
| 513 | smp_mb(); |
| 514 | /* |
| 515 | * If software scanning, complete the scan but since |
| 516 | * the scan_sdata is NULL already don't send out a |
| 517 | * scan event to userspace -- the scan is incomplete. |
| 518 | */ |
| 519 | if (local->sw_scanning) |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 520 | ieee80211_scan_completed(&local->hw, true); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 521 | } |
| 522 | |
| 523 | conf.vif = &sdata->vif; |
| 524 | conf.type = sdata->vif.type; |
| 525 | conf.mac_addr = dev->dev_addr; |
| 526 | /* disable all keys for as long as this netdev is down */ |
| 527 | ieee80211_disable_keys(sdata); |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 528 | drv_remove_interface(local, &conf); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 529 | } |
| 530 | |
| 531 | sdata->bss = NULL; |
| 532 | |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 533 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
| 534 | |
| 535 | ieee80211_recalc_ps(local, -1); |
| 536 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 537 | if (local->open_count == 0) { |
| 538 | if (netif_running(local->mdev)) |
| 539 | dev_close(local->mdev); |
| 540 | |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 541 | drv_stop(local); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 542 | |
Johannes Berg | 1f87f7d | 2009-06-02 13:01:41 +0200 | [diff] [blame] | 543 | ieee80211_led_radio(local, false); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 544 | |
| 545 | flush_workqueue(local->hw.workqueue); |
| 546 | |
| 547 | tasklet_disable(&local->tx_pending_tasklet); |
| 548 | tasklet_disable(&local->tasklet); |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 549 | |
| 550 | /* no reconfiguring after stop! */ |
| 551 | hw_reconf_flags = 0; |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 552 | } |
| 553 | |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 554 | /* do after stop to avoid reconfiguring when we stop anyway */ |
| 555 | if (hw_reconf_flags) |
| 556 | ieee80211_hw_config(local, hw_reconf_flags); |
| 557 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 558 | return 0; |
| 559 | } |
| 560 | |
| 561 | static void ieee80211_set_multicast_list(struct net_device *dev) |
| 562 | { |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 563 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
Johannes Berg | b4a4bf5 | 2008-09-26 13:34:54 +0200 | [diff] [blame] | 564 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 565 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
| 566 | |
| 567 | allmulti = !!(dev->flags & IFF_ALLMULTI); |
| 568 | promisc = !!(dev->flags & IFF_PROMISC); |
| 569 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); |
| 570 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); |
| 571 | |
| 572 | if (allmulti != sdata_allmulti) { |
| 573 | if (dev->flags & IFF_ALLMULTI) |
| 574 | atomic_inc(&local->iff_allmultis); |
| 575 | else |
| 576 | atomic_dec(&local->iff_allmultis); |
| 577 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; |
| 578 | } |
| 579 | |
| 580 | if (promisc != sdata_promisc) { |
| 581 | if (dev->flags & IFF_PROMISC) |
| 582 | atomic_inc(&local->iff_promiscs); |
| 583 | else |
| 584 | atomic_dec(&local->iff_promiscs); |
| 585 | sdata->flags ^= IEEE80211_SDATA_PROMISC; |
| 586 | } |
| 587 | |
| 588 | dev_mc_sync(local->mdev, dev); |
| 589 | } |
| 590 | |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 591 | /* |
| 592 | * Called when the netdev is removed or, by the code below, before |
| 593 | * the interface type changes. |
| 594 | */ |
| 595 | static void ieee80211_teardown_sdata(struct net_device *dev) |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 596 | { |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 597 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 598 | struct ieee80211_local *local = sdata->local; |
| 599 | struct beacon_data *beacon; |
| 600 | struct sk_buff *skb; |
| 601 | int flushed; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 602 | int i; |
| 603 | |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 604 | /* free extra data */ |
| 605 | ieee80211_free_keys(sdata); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 606 | |
Jouni Malinen | aee14ce | 2008-09-09 16:33:15 +0200 | [diff] [blame] | 607 | ieee80211_debugfs_remove_netdev(sdata); |
| 608 | |
Johannes Berg | 988c0f7 | 2008-04-17 19:21:22 +0200 | [diff] [blame] | 609 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 610 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 611 | sdata->fragment_next = 0; |
| 612 | |
| 613 | switch (sdata->vif.type) { |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 614 | case NL80211_IFTYPE_AP: |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 615 | beacon = sdata->u.ap.beacon; |
| 616 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); |
| 617 | synchronize_rcu(); |
| 618 | kfree(beacon); |
| 619 | |
| 620 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { |
| 621 | local->total_ps_buffered--; |
| 622 | dev_kfree_skb(skb); |
| 623 | } |
| 624 | |
| 625 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 626 | case NL80211_IFTYPE_MESH_POINT: |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 627 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 628 | mesh_rmc_free(sdata); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 629 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 630 | case NL80211_IFTYPE_ADHOC: |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 631 | if (WARN_ON(sdata->u.ibss.presp)) |
| 632 | kfree_skb(sdata->u.ibss.presp); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 633 | break; |
| 634 | case NL80211_IFTYPE_STATION: |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 635 | case NL80211_IFTYPE_WDS: |
| 636 | case NL80211_IFTYPE_AP_VLAN: |
| 637 | case NL80211_IFTYPE_MONITOR: |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 638 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 639 | case NL80211_IFTYPE_UNSPECIFIED: |
| 640 | case __NL80211_IFTYPE_AFTER_LAST: |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 641 | BUG(); |
| 642 | break; |
| 643 | } |
| 644 | |
| 645 | flushed = sta_info_flush(local, sdata); |
| 646 | WARN_ON(flushed); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 647 | } |
| 648 | |
Johannes Berg | 587e729 | 2009-01-30 13:35:22 +0100 | [diff] [blame] | 649 | static const struct net_device_ops ieee80211_dataif_ops = { |
| 650 | .ndo_open = ieee80211_open, |
| 651 | .ndo_stop = ieee80211_stop, |
| 652 | .ndo_uninit = ieee80211_teardown_sdata, |
| 653 | .ndo_start_xmit = ieee80211_subif_start_xmit, |
| 654 | .ndo_set_multicast_list = ieee80211_set_multicast_list, |
| 655 | .ndo_change_mtu = ieee80211_change_mtu, |
| 656 | .ndo_set_mac_address = eth_mac_addr, |
| 657 | }; |
| 658 | |
| 659 | static const struct net_device_ops ieee80211_monitorif_ops = { |
| 660 | .ndo_open = ieee80211_open, |
| 661 | .ndo_stop = ieee80211_stop, |
| 662 | .ndo_uninit = ieee80211_teardown_sdata, |
| 663 | .ndo_start_xmit = ieee80211_monitor_start_xmit, |
| 664 | .ndo_set_multicast_list = ieee80211_set_multicast_list, |
| 665 | .ndo_change_mtu = ieee80211_change_mtu, |
| 666 | .ndo_set_mac_address = eth_mac_addr, |
| 667 | }; |
| 668 | |
| 669 | static void ieee80211_if_setup(struct net_device *dev) |
| 670 | { |
| 671 | ether_setup(dev); |
| 672 | dev->netdev_ops = &ieee80211_dataif_ops; |
| 673 | dev->wireless_handlers = &ieee80211_iw_handler_def; |
| 674 | dev->destructor = free_netdev; |
| 675 | } |
| 676 | |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 677 | /* |
| 678 | * Helper function to initialise an interface to a specific type. |
| 679 | */ |
| 680 | static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 681 | enum nl80211_iftype type) |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 682 | { |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 683 | /* clear type-dependent union */ |
| 684 | memset(&sdata->u, 0, sizeof(sdata->u)); |
| 685 | |
| 686 | /* and set some type-dependent values */ |
| 687 | sdata->vif.type = type; |
Johannes Berg | 587e729 | 2009-01-30 13:35:22 +0100 | [diff] [blame] | 688 | sdata->dev->netdev_ops = &ieee80211_dataif_ops; |
Johannes Berg | 60719ff | 2008-09-16 14:55:09 +0200 | [diff] [blame] | 689 | sdata->wdev.iftype = type; |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 690 | |
| 691 | /* only monitor differs */ |
| 692 | sdata->dev->type = ARPHRD_ETHER; |
| 693 | |
| 694 | switch (type) { |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 695 | case NL80211_IFTYPE_AP: |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 696 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); |
| 697 | INIT_LIST_HEAD(&sdata->u.ap.vlans); |
| 698 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 699 | case NL80211_IFTYPE_STATION: |
Johannes Berg | 9c6bd79 | 2008-09-11 00:01:52 +0200 | [diff] [blame] | 700 | ieee80211_sta_setup_sdata(sdata); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 701 | break; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 702 | case NL80211_IFTYPE_ADHOC: |
| 703 | ieee80211_ibss_setup_sdata(sdata); |
| 704 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 705 | case NL80211_IFTYPE_MESH_POINT: |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 706 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
| 707 | ieee80211_mesh_init_sdata(sdata); |
| 708 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 709 | case NL80211_IFTYPE_MONITOR: |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 710 | sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
Johannes Berg | 587e729 | 2009-01-30 13:35:22 +0100 | [diff] [blame] | 711 | sdata->dev->netdev_ops = &ieee80211_monitorif_ops; |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 712 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | |
| 713 | MONITOR_FLAG_OTHER_BSS; |
| 714 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 715 | case NL80211_IFTYPE_WDS: |
| 716 | case NL80211_IFTYPE_AP_VLAN: |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 717 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 718 | case NL80211_IFTYPE_UNSPECIFIED: |
| 719 | case __NL80211_IFTYPE_AFTER_LAST: |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 720 | BUG(); |
| 721 | break; |
| 722 | } |
| 723 | |
| 724 | ieee80211_debugfs_add_netdev(sdata); |
| 725 | } |
| 726 | |
Johannes Berg | f3947e2 | 2008-07-09 14:40:36 +0200 | [diff] [blame] | 727 | int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 728 | enum nl80211_iftype type) |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 729 | { |
Johannes Berg | f3947e2 | 2008-07-09 14:40:36 +0200 | [diff] [blame] | 730 | ASSERT_RTNL(); |
| 731 | |
| 732 | if (type == sdata->vif.type) |
| 733 | return 0; |
| 734 | |
Johannes Berg | e60c774 | 2008-11-26 23:31:40 +0100 | [diff] [blame] | 735 | /* Setting ad-hoc mode on non-IBSS channel is not supported. */ |
Pavel Roskin | dcebf45 | 2008-12-22 16:39:36 -0500 | [diff] [blame] | 736 | if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && |
| 737 | type == NL80211_IFTYPE_ADHOC) |
Johannes Berg | e60c774 | 2008-11-26 23:31:40 +0100 | [diff] [blame] | 738 | return -EOPNOTSUPP; |
| 739 | |
Johannes Berg | f3947e2 | 2008-07-09 14:40:36 +0200 | [diff] [blame] | 740 | /* |
| 741 | * We could, here, on changes between IBSS/STA/MESH modes, |
| 742 | * invoke an MLME function instead that disassociates etc. |
| 743 | * and goes into the requested mode. |
| 744 | */ |
| 745 | |
| 746 | if (netif_running(sdata->dev)) |
| 747 | return -EBUSY; |
| 748 | |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 749 | /* Purge and reset type-dependent state. */ |
| 750 | ieee80211_teardown_sdata(sdata->dev); |
| 751 | ieee80211_setup_sdata(sdata, type); |
| 752 | |
| 753 | /* reset some values that shouldn't be kept across type changes */ |
Johannes Berg | bda3933 | 2008-10-11 01:51:51 +0200 | [diff] [blame] | 754 | sdata->vif.bss_conf.basic_rates = |
Johannes Berg | 96dd22a | 2008-09-11 00:01:57 +0200 | [diff] [blame] | 755 | ieee80211_mandatory_rates(sdata->local, |
| 756 | sdata->local->hw.conf.channel->band); |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 757 | sdata->drop_unencrypted = 0; |
Johannes Berg | f3947e2 | 2008-07-09 14:40:36 +0200 | [diff] [blame] | 758 | |
| 759 | return 0; |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 760 | } |
| 761 | |
Johannes Berg | 3e122be | 2008-07-09 14:40:34 +0200 | [diff] [blame] | 762 | int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 763 | struct net_device **new_dev, enum nl80211_iftype type, |
Luis Carlos Cobo | ee38585 | 2008-02-23 15:17:11 +0100 | [diff] [blame] | 764 | struct vif_params *params) |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 765 | { |
| 766 | struct net_device *ndev; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 767 | struct ieee80211_sub_if_data *sdata = NULL; |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 768 | int ret, i; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 769 | |
| 770 | ASSERT_RTNL(); |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 771 | |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 772 | ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size, |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 773 | name, ieee80211_if_setup); |
| 774 | if (!ndev) |
| 775 | return -ENOMEM; |
| 776 | |
Johannes Berg | f3994ec | 2008-05-12 20:51:44 -0700 | [diff] [blame] | 777 | ndev->needed_headroom = local->tx_headroom + |
| 778 | 4*6 /* four MAC addresses */ |
| 779 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ |
| 780 | + 6 /* mesh */ |
| 781 | + 8 /* rfc1042/bridge tunnel */ |
| 782 | - ETH_HLEN /* ethernet hard_header_len */ |
| 783 | + IEEE80211_ENCRYPT_HEADROOM; |
| 784 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; |
| 785 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 786 | ret = dev_alloc_name(ndev, ndev->name); |
| 787 | if (ret < 0) |
| 788 | goto fail; |
| 789 | |
| 790 | memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 791 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); |
Johannes Berg | 076ae60 | 2009-02-11 20:27:30 +0100 | [diff] [blame] | 792 | ndev->features |= NETIF_F_NETNS_LOCAL; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 793 | |
Johannes Berg | 3e122be | 2008-07-09 14:40:34 +0200 | [diff] [blame] | 794 | /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ |
| 795 | sdata = netdev_priv(ndev); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 796 | ndev->ieee80211_ptr = &sdata->wdev; |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 797 | |
| 798 | /* initialise type-independent data */ |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 799 | sdata->wdev.wiphy = local->hw.wiphy; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 800 | sdata->local = local; |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 801 | sdata->dev = ndev; |
| 802 | |
| 803 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
| 804 | skb_queue_head_init(&sdata->fragments[i].skb_list); |
| 805 | |
| 806 | INIT_LIST_HEAD(&sdata->key_list); |
| 807 | |
| 808 | sdata->force_unicast_rateidx = -1; |
| 809 | sdata->max_ratectrl_rateidx = -1; |
| 810 | |
| 811 | /* setup type-dependent data */ |
| 812 | ieee80211_setup_sdata(sdata, type); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 813 | |
| 814 | ret = register_netdevice(ndev); |
| 815 | if (ret) |
| 816 | goto fail; |
| 817 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 818 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
| 819 | params && params->mesh_id_len) |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 820 | ieee80211_sdata_set_mesh_id(sdata, |
| 821 | params->mesh_id_len, |
| 822 | params->mesh_id); |
Luis Carlos Cobo | ee38585 | 2008-02-23 15:17:11 +0100 | [diff] [blame] | 823 | |
Johannes Berg | c771c9d | 2009-01-23 22:54:03 +0100 | [diff] [blame] | 824 | mutex_lock(&local->iflist_mtx); |
Johannes Berg | 7901042 | 2007-09-18 17:29:21 -0400 | [diff] [blame] | 825 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
Johannes Berg | c771c9d | 2009-01-23 22:54:03 +0100 | [diff] [blame] | 826 | mutex_unlock(&local->iflist_mtx); |
Johannes Berg | 7901042 | 2007-09-18 17:29:21 -0400 | [diff] [blame] | 827 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 828 | if (new_dev) |
| 829 | *new_dev = ndev; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 830 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 831 | return 0; |
| 832 | |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 833 | fail: |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 834 | free_netdev(ndev); |
| 835 | return ret; |
| 836 | } |
| 837 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 838 | void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 839 | { |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 840 | ASSERT_RTNL(); |
Johannes Berg | 11a843b | 2007-08-28 17:01:55 -0400 | [diff] [blame] | 841 | |
Johannes Berg | c771c9d | 2009-01-23 22:54:03 +0100 | [diff] [blame] | 842 | mutex_lock(&sdata->local->iflist_mtx); |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 843 | list_del_rcu(&sdata->list); |
Johannes Berg | c771c9d | 2009-01-23 22:54:03 +0100 | [diff] [blame] | 844 | mutex_unlock(&sdata->local->iflist_mtx); |
| 845 | |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 846 | synchronize_rcu(); |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 847 | unregister_netdevice(sdata->dev); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 848 | } |
| 849 | |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 850 | /* |
| 851 | * Remove all interfaces, may only be called at hardware unregistration |
| 852 | * time because it doesn't do RCU-safe list removals. |
| 853 | */ |
| 854 | void ieee80211_remove_interfaces(struct ieee80211_local *local) |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 855 | { |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 856 | struct ieee80211_sub_if_data *sdata, *tmp; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 857 | |
| 858 | ASSERT_RTNL(); |
| 859 | |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 860 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
Johannes Berg | c771c9d | 2009-01-23 22:54:03 +0100 | [diff] [blame] | 861 | /* |
| 862 | * we cannot hold the iflist_mtx across unregister_netdevice, |
| 863 | * but we only need to hold it for list modifications to lock |
| 864 | * out readers since we're under the RTNL here as all other |
| 865 | * writers. |
| 866 | */ |
| 867 | mutex_lock(&local->iflist_mtx); |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 868 | list_del(&sdata->list); |
Johannes Berg | c771c9d | 2009-01-23 22:54:03 +0100 | [diff] [blame] | 869 | mutex_unlock(&local->iflist_mtx); |
| 870 | |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 871 | unregister_netdevice(sdata->dev); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 872 | } |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 873 | } |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 874 | |
| 875 | static u32 ieee80211_idle_off(struct ieee80211_local *local, |
| 876 | const char *reason) |
| 877 | { |
| 878 | if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) |
| 879 | return 0; |
| 880 | |
| 881 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 882 | printk(KERN_DEBUG "%s: device no longer idle - %s\n", |
| 883 | wiphy_name(local->hw.wiphy), reason); |
| 884 | #endif |
| 885 | |
| 886 | local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; |
| 887 | return IEEE80211_CONF_CHANGE_IDLE; |
| 888 | } |
| 889 | |
| 890 | static u32 ieee80211_idle_on(struct ieee80211_local *local) |
| 891 | { |
| 892 | if (local->hw.conf.flags & IEEE80211_CONF_IDLE) |
| 893 | return 0; |
| 894 | |
| 895 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 896 | printk(KERN_DEBUG "%s: device now idle\n", |
| 897 | wiphy_name(local->hw.wiphy)); |
| 898 | #endif |
| 899 | |
| 900 | local->hw.conf.flags |= IEEE80211_CONF_IDLE; |
| 901 | return IEEE80211_CONF_CHANGE_IDLE; |
| 902 | } |
| 903 | |
| 904 | u32 __ieee80211_recalc_idle(struct ieee80211_local *local) |
| 905 | { |
| 906 | struct ieee80211_sub_if_data *sdata; |
| 907 | int count = 0; |
| 908 | |
| 909 | if (local->hw_scanning || local->sw_scanning) |
| 910 | return ieee80211_idle_off(local, "scanning"); |
| 911 | |
| 912 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 913 | if (!netif_running(sdata->dev)) |
| 914 | continue; |
| 915 | /* do not count disabled managed interfaces */ |
| 916 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 917 | !sdata->u.mgd.associated && |
| 918 | list_empty(&sdata->u.mgd.work_list)) |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 919 | continue; |
| 920 | /* do not count unused IBSS interfaces */ |
| 921 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
| 922 | !sdata->u.ibss.ssid_len) |
| 923 | continue; |
| 924 | /* count everything else */ |
| 925 | count++; |
| 926 | } |
| 927 | |
| 928 | if (!count) |
| 929 | return ieee80211_idle_on(local); |
| 930 | else |
| 931 | return ieee80211_idle_off(local, "in use"); |
| 932 | |
| 933 | return 0; |
| 934 | } |
| 935 | |
| 936 | void ieee80211_recalc_idle(struct ieee80211_local *local) |
| 937 | { |
| 938 | u32 chg; |
| 939 | |
| 940 | mutex_lock(&local->iflist_mtx); |
| 941 | chg = __ieee80211_recalc_idle(local); |
| 942 | mutex_unlock(&local->iflist_mtx); |
Johannes Berg | 58905ca | 2009-05-07 14:23:01 +0200 | [diff] [blame] | 943 | if (chg) |
| 944 | ieee80211_hw_config(local, chg); |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 945 | } |