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 | */ |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 13 | #include <linux/slab.h> |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 14 | #include <linux/kernel.h> |
| 15 | #include <linux/if_arp.h> |
| 16 | #include <linux/netdevice.h> |
| 17 | #include <linux/rtnetlink.h> |
| 18 | #include <net/mac80211.h> |
Johannes Berg | cf0277e | 2010-01-05 18:00:58 +0100 | [diff] [blame] | 19 | #include <net/ieee80211_radiotap.h> |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 20 | #include "ieee80211_i.h" |
| 21 | #include "sta_info.h" |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 22 | #include "debugfs_netdev.h" |
Luis Carlos Cobo | ee38585 | 2008-02-23 15:17:11 +0100 | [diff] [blame] | 23 | #include "mesh.h" |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 24 | #include "led.h" |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 25 | #include "driver-ops.h" |
Johannes Berg | cf0277e | 2010-01-05 18:00:58 +0100 | [diff] [blame] | 26 | #include "wme.h" |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 27 | |
Johannes Berg | c771c9d | 2009-01-23 22:54:03 +0100 | [diff] [blame] | 28 | /** |
| 29 | * DOC: Interface list locking |
| 30 | * |
| 31 | * The interface list in each struct ieee80211_local is protected |
| 32 | * three-fold: |
| 33 | * |
| 34 | * (1) modifications may only be done under the RTNL |
| 35 | * (2) modifications and readers are protected against each other by |
| 36 | * the iflist_mtx. |
| 37 | * (3) modifications are done in an RCU manner so atomic readers |
| 38 | * can traverse the list in RCU-safe blocks. |
| 39 | * |
| 40 | * As a consequence, reads (traversals) of the list can be protected |
| 41 | * by either the RTNL, the iflist_mtx or RCU. |
| 42 | */ |
| 43 | |
| 44 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 45 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
| 46 | { |
| 47 | int meshhdrlen; |
| 48 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 49 | |
| 50 | meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0; |
| 51 | |
| 52 | /* FIX: what would be proper limits for MTU? |
| 53 | * This interface uses 802.3 frames. */ |
| 54 | if (new_mtu < 256 || |
| 55 | new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { |
| 56 | return -EINVAL; |
| 57 | } |
| 58 | |
| 59 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 60 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); |
| 61 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
| 62 | dev->mtu = new_mtu; |
| 63 | return 0; |
| 64 | } |
| 65 | |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 66 | static int ieee80211_change_mac(struct net_device *dev, void *addr) |
| 67 | { |
| 68 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
Kalle Valo | fc5f757 | 2009-12-30 15:54:03 +0200 | [diff] [blame] | 69 | struct sockaddr *sa = addr; |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 70 | int ret; |
| 71 | |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 72 | if (ieee80211_sdata_running(sdata)) |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 73 | return -EBUSY; |
| 74 | |
Kalle Valo | fc5f757 | 2009-12-30 15:54:03 +0200 | [diff] [blame] | 75 | ret = eth_mac_addr(dev, sa); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 76 | |
| 77 | if (ret == 0) |
Kalle Valo | fc5f757 | 2009-12-30 15:54:03 +0200 | [diff] [blame] | 78 | memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 79 | |
| 80 | return ret; |
| 81 | } |
| 82 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 83 | static inline int identical_mac_addr_allowed(int type1, int type2) |
| 84 | { |
| 85 | return type1 == NL80211_IFTYPE_MONITOR || |
| 86 | type2 == NL80211_IFTYPE_MONITOR || |
| 87 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || |
| 88 | (type1 == NL80211_IFTYPE_WDS && |
| 89 | (type2 == NL80211_IFTYPE_WDS || |
| 90 | type2 == NL80211_IFTYPE_AP)) || |
| 91 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || |
| 92 | (type1 == NL80211_IFTYPE_AP_VLAN && |
| 93 | (type2 == NL80211_IFTYPE_AP || |
| 94 | type2 == NL80211_IFTYPE_AP_VLAN)); |
| 95 | } |
| 96 | |
| 97 | static int ieee80211_open(struct net_device *dev) |
| 98 | { |
Johannes Berg | b4a4bf5 | 2008-09-26 13:34:54 +0200 | [diff] [blame] | 99 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 100 | struct ieee80211_sub_if_data *nsdata; |
| 101 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 102 | struct sta_info *sta; |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 103 | u32 changed = 0; |
| 104 | int res; |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 105 | u32 hw_reconf_flags = 0; |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 106 | u8 null_addr[ETH_ALEN] = {0}; |
| 107 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 108 | /* fail early if user set an invalid address */ |
| 109 | if (compare_ether_addr(dev->dev_addr, null_addr) && |
| 110 | !is_valid_ether_addr(dev->dev_addr)) |
| 111 | return -EADDRNOTAVAIL; |
| 112 | |
| 113 | /* we hold the RTNL here so can safely walk the list */ |
| 114 | list_for_each_entry(nsdata, &local->interfaces, list) { |
| 115 | struct net_device *ndev = nsdata->dev; |
| 116 | |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 117 | if (ndev != dev && ieee80211_sdata_running(nsdata)) { |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 118 | /* |
| 119 | * Allow only a single IBSS interface to be up at any |
| 120 | * time. This is restricted because beacon distribution |
| 121 | * cannot work properly if both are in the same IBSS. |
| 122 | * |
| 123 | * To remove this restriction we'd have to disallow them |
| 124 | * from setting the same SSID on different IBSS interfaces |
| 125 | * belonging to the same hardware. Then, however, we're |
| 126 | * faced with having to adopt two different TSF timers... |
| 127 | */ |
| 128 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
| 129 | nsdata->vif.type == NL80211_IFTYPE_ADHOC) |
| 130 | return -EBUSY; |
| 131 | |
| 132 | /* |
| 133 | * The remaining checks are only performed for interfaces |
| 134 | * with the same MAC address. |
| 135 | */ |
| 136 | if (compare_ether_addr(dev->dev_addr, ndev->dev_addr)) |
| 137 | continue; |
| 138 | |
| 139 | /* |
| 140 | * check whether it may have the same address |
| 141 | */ |
| 142 | if (!identical_mac_addr_allowed(sdata->vif.type, |
| 143 | nsdata->vif.type)) |
| 144 | return -ENOTUNIQ; |
| 145 | |
| 146 | /* |
| 147 | * can only add VLANs to enabled APs |
| 148 | */ |
| 149 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
| 150 | nsdata->vif.type == NL80211_IFTYPE_AP) |
| 151 | sdata->bss = &nsdata->u.ap; |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | switch (sdata->vif.type) { |
| 156 | case NL80211_IFTYPE_WDS: |
| 157 | if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) |
| 158 | return -ENOLINK; |
| 159 | break; |
| 160 | case NL80211_IFTYPE_AP_VLAN: |
| 161 | if (!sdata->bss) |
| 162 | return -ENOLINK; |
| 163 | list_add(&sdata->u.vlan.list, &sdata->bss->vlans); |
| 164 | break; |
| 165 | case NL80211_IFTYPE_AP: |
| 166 | sdata->bss = &sdata->u.ap; |
| 167 | break; |
| 168 | case NL80211_IFTYPE_MESH_POINT: |
| 169 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
| 170 | break; |
| 171 | /* mesh ifaces must set allmulti to forward mcast traffic */ |
| 172 | atomic_inc(&local->iff_allmultis); |
| 173 | break; |
| 174 | case NL80211_IFTYPE_STATION: |
| 175 | case NL80211_IFTYPE_MONITOR: |
| 176 | case NL80211_IFTYPE_ADHOC: |
| 177 | /* no special treatment */ |
| 178 | break; |
| 179 | case NL80211_IFTYPE_UNSPECIFIED: |
| 180 | case __NL80211_IFTYPE_AFTER_LAST: |
| 181 | /* cannot happen */ |
| 182 | WARN_ON(1); |
| 183 | break; |
| 184 | } |
| 185 | |
| 186 | if (local->open_count == 0) { |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 187 | res = drv_start(local); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 188 | if (res) |
| 189 | goto err_del_bss; |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 190 | /* we're brought up, everything changes */ |
| 191 | hw_reconf_flags = ~0; |
Johannes Berg | 1f87f7d | 2009-06-02 13:01:41 +0200 | [diff] [blame] | 192 | ieee80211_led_radio(local, true); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 193 | } |
| 194 | |
| 195 | /* |
| 196 | * Check all interfaces and copy the hopefully now-present |
| 197 | * MAC address to those that have the special null one. |
| 198 | */ |
| 199 | list_for_each_entry(nsdata, &local->interfaces, list) { |
| 200 | struct net_device *ndev = nsdata->dev; |
| 201 | |
| 202 | /* |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 203 | * No need to check running since we do not allow |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 204 | * it to start up with this invalid address. |
| 205 | */ |
John W. Linville | 0adc23f | 2009-10-06 16:27:18 -0400 | [diff] [blame] | 206 | if (compare_ether_addr(null_addr, ndev->dev_addr) == 0) { |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 207 | memcpy(ndev->dev_addr, |
| 208 | local->hw.wiphy->perm_addr, |
| 209 | ETH_ALEN); |
John W. Linville | 0adc23f | 2009-10-06 16:27:18 -0400 | [diff] [blame] | 210 | memcpy(ndev->perm_addr, ndev->dev_addr, ETH_ALEN); |
| 211 | } |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 212 | } |
| 213 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 214 | /* |
| 215 | * Validate the MAC address for this device. |
| 216 | */ |
| 217 | if (!is_valid_ether_addr(dev->dev_addr)) { |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 218 | if (!local->open_count) |
| 219 | drv_stop(local); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 220 | return -EADDRNOTAVAIL; |
| 221 | } |
| 222 | |
| 223 | switch (sdata->vif.type) { |
| 224 | case NL80211_IFTYPE_AP_VLAN: |
| 225 | /* no need to tell driver */ |
| 226 | break; |
| 227 | case NL80211_IFTYPE_MONITOR: |
| 228 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { |
| 229 | local->cooked_mntrs++; |
| 230 | break; |
| 231 | } |
| 232 | |
| 233 | /* must be before the call to ieee80211_configure_filter */ |
| 234 | local->monitors++; |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 235 | if (local->monitors == 1) { |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 236 | local->hw.conf.flags |= IEEE80211_CONF_MONITOR; |
| 237 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 238 | } |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 239 | |
| 240 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) |
| 241 | local->fif_fcsfail++; |
| 242 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) |
| 243 | local->fif_plcpfail++; |
Igor Perminov | e3b90ca | 2009-08-04 16:48:51 +0400 | [diff] [blame] | 244 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) { |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 245 | local->fif_control++; |
Igor Perminov | e3b90ca | 2009-08-04 16:48:51 +0400 | [diff] [blame] | 246 | local->fif_pspoll++; |
| 247 | } |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 248 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
| 249 | local->fif_other_bss++; |
| 250 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 251 | ieee80211_configure_filter(local); |
David Gnedt | 53e9b1d | 2010-07-19 20:44:02 +0200 | [diff] [blame] | 252 | |
| 253 | netif_carrier_on(dev); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 254 | break; |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 255 | default: |
Johannes Berg | 1ed32e4 | 2009-12-23 13:15:45 +0100 | [diff] [blame] | 256 | res = drv_add_interface(local, &sdata->vif); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 257 | if (res) |
| 258 | goto err_stop; |
| 259 | |
Andrey Yurovsky | a3c9aa5 | 2008-10-31 14:50:12 -0700 | [diff] [blame] | 260 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
| 261 | local->fif_other_bss++; |
Andrey Yurovsky | a3c9aa5 | 2008-10-31 14:50:12 -0700 | [diff] [blame] | 262 | ieee80211_configure_filter(local); |
Andrey Yurovsky | a3c9aa5 | 2008-10-31 14:50:12 -0700 | [diff] [blame] | 263 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 264 | ieee80211_start_mesh(sdata); |
Igor Perminov | e3b90ca | 2009-08-04 16:48:51 +0400 | [diff] [blame] | 265 | } else if (sdata->vif.type == NL80211_IFTYPE_AP) { |
| 266 | local->fif_pspoll++; |
| 267 | |
Igor Perminov | e3b90ca | 2009-08-04 16:48:51 +0400 | [diff] [blame] | 268 | ieee80211_configure_filter(local); |
Andrey Yurovsky | a3c9aa5 | 2008-10-31 14:50:12 -0700 | [diff] [blame] | 269 | } |
Igor Perminov | e3b90ca | 2009-08-04 16:48:51 +0400 | [diff] [blame] | 270 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 271 | changed |= ieee80211_reset_erp_info(sdata); |
| 272 | ieee80211_bss_info_change_notify(sdata, changed); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 273 | |
Johannes Berg | 7986cf9 | 2009-03-21 17:08:43 +0100 | [diff] [blame] | 274 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 275 | netif_carrier_off(dev); |
| 276 | else |
| 277 | netif_carrier_on(dev); |
| 278 | } |
| 279 | |
| 280 | if (sdata->vif.type == NL80211_IFTYPE_WDS) { |
| 281 | /* Create STA entry for the WDS peer */ |
| 282 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, |
| 283 | GFP_KERNEL); |
| 284 | if (!sta) { |
| 285 | res = -ENOMEM; |
| 286 | goto err_del_interface; |
| 287 | } |
| 288 | |
| 289 | /* no locking required since STA is not live yet */ |
| 290 | sta->flags |= WLAN_STA_AUTHORIZED; |
| 291 | |
| 292 | res = sta_info_insert(sta); |
| 293 | if (res) { |
| 294 | /* STA has been freed */ |
| 295 | goto err_del_interface; |
| 296 | } |
| 297 | } |
| 298 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 299 | /* |
| 300 | * set_multicast_list will be invoked by the networking core |
| 301 | * which will check whether any increments here were done in |
| 302 | * error and sync them down to the hardware as filter flags. |
| 303 | */ |
| 304 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) |
| 305 | atomic_inc(&local->iff_allmultis); |
| 306 | |
| 307 | if (sdata->flags & IEEE80211_SDATA_PROMISC) |
| 308 | atomic_inc(&local->iff_promiscs); |
| 309 | |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 310 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
| 311 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 312 | local->open_count++; |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 313 | if (hw_reconf_flags) { |
| 314 | ieee80211_hw_config(local, hw_reconf_flags); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 315 | /* |
| 316 | * set default queue parameters so drivers don't |
| 317 | * need to initialise the hardware if the hardware |
| 318 | * doesn't start up with sane defaults |
| 319 | */ |
| 320 | ieee80211_set_wmm_default(sdata); |
| 321 | } |
| 322 | |
Johannes Berg | 10f644a | 2009-04-16 13:17:25 +0200 | [diff] [blame] | 323 | ieee80211_recalc_ps(local, -1); |
Johannes Berg | 965beda | 2009-04-16 13:17:24 +0200 | [diff] [blame] | 324 | |
John W. Linville | 8a5b33f | 2010-01-06 15:39:39 -0500 | [diff] [blame] | 325 | netif_tx_start_all_queues(dev); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 326 | |
| 327 | return 0; |
| 328 | err_del_interface: |
Johannes Berg | 1ed32e4 | 2009-12-23 13:15:45 +0100 | [diff] [blame] | 329 | drv_remove_interface(local, &sdata->vif); |
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; |
Johannes Berg | 5061b0c | 2009-07-14 00:33:34 +0200 | [diff] [blame] | 344 | unsigned long flags; |
| 345 | struct sk_buff *skb, *tmp; |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 346 | u32 hw_reconf_flags = 0; |
Johannes Berg | 5061b0c | 2009-07-14 00:33:34 +0200 | [diff] [blame] | 347 | int i; |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 348 | |
| 349 | /* |
| 350 | * Stop TX on this interface first. |
| 351 | */ |
John W. Linville | 8a5b33f | 2010-01-06 15:39:39 -0500 | [diff] [blame] | 352 | netif_tx_stop_all_queues(dev); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 353 | |
| 354 | /* |
Johannes Berg | af6b637 | 2009-12-23 13:15:35 +0100 | [diff] [blame] | 355 | * Purge work for this interface. |
| 356 | */ |
| 357 | ieee80211_work_purge(sdata); |
| 358 | |
| 359 | /* |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 360 | * Remove all stations associated with this interface. |
| 361 | * |
| 362 | * This must be done before calling ops->remove_interface() |
| 363 | * because otherwise we can later invoke ops->sta_notify() |
| 364 | * whenever the STAs are removed, and that invalidates driver |
| 365 | * assumptions about always getting a vif pointer that is valid |
| 366 | * (because if we remove a STA after ops->remove_interface() |
| 367 | * the driver will have removed the vif info already!) |
| 368 | * |
| 369 | * We could relax this and only unlink the stations from the |
| 370 | * hash table and list but keep them on a per-sdata list that |
| 371 | * will be inserted back again when the interface is brought |
| 372 | * up again, but I don't currently see a use case for that, |
| 373 | * except with WDS which gets a STA entry created when it is |
| 374 | * brought up. |
| 375 | */ |
| 376 | sta_info_flush(local, sdata); |
| 377 | |
| 378 | /* |
| 379 | * Don't count this interface for promisc/allmulti while it |
| 380 | * is down. dev_mc_unsync() will invoke set_multicast_list |
| 381 | * on the master interface which will sync these down to the |
| 382 | * hardware as filter flags. |
| 383 | */ |
| 384 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) |
| 385 | atomic_dec(&local->iff_allmultis); |
| 386 | |
| 387 | if (sdata->flags & IEEE80211_SDATA_PROMISC) |
| 388 | atomic_dec(&local->iff_promiscs); |
| 389 | |
Igor Perminov | e3b90ca | 2009-08-04 16:48:51 +0400 | [diff] [blame] | 390 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
| 391 | local->fif_pspoll--; |
| 392 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 393 | netif_addr_lock_bh(dev); |
| 394 | spin_lock_bh(&local->filter_lock); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 395 | __hw_addr_unsync(&local->mc_list, &dev->mc, dev->addr_len); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 396 | spin_unlock_bh(&local->filter_lock); |
| 397 | netif_addr_unlock_bh(dev); |
| 398 | |
Johannes Berg | 3ac64be | 2009-08-17 16:16:53 +0200 | [diff] [blame] | 399 | ieee80211_configure_filter(local); |
| 400 | |
Vivek Natarajan | 7cbf0ba | 2008-12-24 00:34:37 -0800 | [diff] [blame] | 401 | del_timer_sync(&local->dynamic_ps_timer); |
| 402 | cancel_work_sync(&local->dynamic_ps_enable_work); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 403 | |
| 404 | /* APs need special treatment */ |
| 405 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
Johannes Berg | 57c9fff | 2009-07-29 15:46:21 +0200 | [diff] [blame] | 406 | struct ieee80211_sub_if_data *vlan, *tmpsdata; |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 407 | struct beacon_data *old_beacon = sdata->u.ap.beacon; |
| 408 | |
| 409 | /* remove beacon */ |
| 410 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); |
| 411 | synchronize_rcu(); |
| 412 | kfree(old_beacon); |
| 413 | |
| 414 | /* down all dependent devices, that is VLANs */ |
Johannes Berg | 57c9fff | 2009-07-29 15:46:21 +0200 | [diff] [blame] | 415 | list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 416 | u.vlan.list) |
| 417 | dev_close(vlan->dev); |
| 418 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); |
| 419 | } |
| 420 | |
| 421 | local->open_count--; |
| 422 | |
| 423 | switch (sdata->vif.type) { |
| 424 | case NL80211_IFTYPE_AP_VLAN: |
| 425 | list_del(&sdata->u.vlan.list); |
| 426 | /* no need to tell driver */ |
| 427 | break; |
| 428 | case NL80211_IFTYPE_MONITOR: |
| 429 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { |
| 430 | local->cooked_mntrs--; |
| 431 | break; |
| 432 | } |
| 433 | |
| 434 | local->monitors--; |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 435 | if (local->monitors == 0) { |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 436 | local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; |
| 437 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 438 | } |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 439 | |
| 440 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) |
| 441 | local->fif_fcsfail--; |
| 442 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) |
| 443 | local->fif_plcpfail--; |
Igor Perminov | e3b90ca | 2009-08-04 16:48:51 +0400 | [diff] [blame] | 444 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) { |
| 445 | local->fif_pspoll--; |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 446 | local->fif_control--; |
Igor Perminov | e3b90ca | 2009-08-04 16:48:51 +0400 | [diff] [blame] | 447 | } |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 448 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
| 449 | local->fif_other_bss--; |
| 450 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 451 | ieee80211_configure_filter(local); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 452 | break; |
| 453 | case NL80211_IFTYPE_STATION: |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 454 | del_timer_sync(&sdata->u.mgd.chswitch_timer); |
| 455 | del_timer_sync(&sdata->u.mgd.timer); |
Johannes Berg | 0e2b628 | 2009-07-13 13:23:39 +0200 | [diff] [blame] | 456 | del_timer_sync(&sdata->u.mgd.conn_mon_timer); |
| 457 | del_timer_sync(&sdata->u.mgd.bcn_mon_timer); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 458 | /* |
Johannes Berg | 0e2b628 | 2009-07-13 13:23:39 +0200 | [diff] [blame] | 459 | * If any of the timers fired while we waited for it, it will |
| 460 | * have queued its work. Now the work will be running again |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 461 | * but will not rearm the timer again because it checks |
| 462 | * whether the interface is running, which, at this point, |
| 463 | * it no longer is. |
| 464 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 465 | cancel_work_sync(&sdata->u.mgd.chswitch_work); |
Johannes Berg | 0e2b628 | 2009-07-13 13:23:39 +0200 | [diff] [blame] | 466 | cancel_work_sync(&sdata->u.mgd.monitor_work); |
Juuso Oikarinen | 1e4dcd0 | 2010-03-19 07:14:53 +0200 | [diff] [blame] | 467 | cancel_work_sync(&sdata->u.mgd.beacon_connection_loss_work); |
Kalle Valo | 04de838 | 2009-03-22 21:57:35 +0200 | [diff] [blame] | 468 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 469 | /* fall through */ |
| 470 | case NL80211_IFTYPE_ADHOC: |
Johannes Berg | 64592c8 | 2010-06-10 10:21:31 +0200 | [diff] [blame] | 471 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 472 | del_timer_sync(&sdata->u.ibss.timer); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 473 | /* fall through */ |
| 474 | case NL80211_IFTYPE_MESH_POINT: |
| 475 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
Andrey Yurovsky | a3c9aa5 | 2008-10-31 14:50:12 -0700 | [diff] [blame] | 476 | /* other_bss and allmulti are always set on mesh |
| 477 | * ifaces */ |
| 478 | local->fif_other_bss--; |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 479 | atomic_dec(&local->iff_allmultis); |
Andrey Yurovsky | a3c9aa5 | 2008-10-31 14:50:12 -0700 | [diff] [blame] | 480 | |
Andrey Yurovsky | a3c9aa5 | 2008-10-31 14:50:12 -0700 | [diff] [blame] | 481 | ieee80211_configure_filter(local); |
Andrey Yurovsky | a3c9aa5 | 2008-10-31 14:50:12 -0700 | [diff] [blame] | 482 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 483 | ieee80211_stop_mesh(sdata); |
| 484 | } |
| 485 | /* fall through */ |
| 486 | default: |
Johannes Berg | c1475ca | 2010-06-10 10:21:37 +0200 | [diff] [blame] | 487 | flush_work(&sdata->work); |
Johannes Berg | 35f20c1 | 2010-06-10 10:21:30 +0200 | [diff] [blame] | 488 | /* |
| 489 | * When we get here, the interface is marked down. |
| 490 | * Call synchronize_rcu() to wait for the RX path |
| 491 | * should it be using the interface and enqueuing |
| 492 | * frames at this very time on another CPU. |
| 493 | */ |
| 494 | synchronize_rcu(); |
| 495 | skb_queue_purge(&sdata->skb_queue); |
| 496 | |
Johannes Berg | 15db0b7 | 2009-08-25 16:33:47 +0200 | [diff] [blame] | 497 | if (local->scan_sdata == sdata) |
| 498 | ieee80211_scan_cancel(local); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 499 | |
Bob Copeland | 97af743 | 2009-07-29 10:13:03 +0200 | [diff] [blame] | 500 | /* |
| 501 | * Disable beaconing for AP and mesh, IBSS can't |
| 502 | * still be joined to a network at this point. |
| 503 | */ |
| 504 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
| 505 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { |
| 506 | ieee80211_bss_info_change_notify(sdata, |
| 507 | BSS_CHANGED_BEACON_ENABLED); |
| 508 | } |
| 509 | |
Johannes Berg | ad0e2b5 | 2010-06-01 10:19:19 +0200 | [diff] [blame] | 510 | /* free all remaining keys, there shouldn't be any */ |
| 511 | ieee80211_free_keys(sdata); |
Johannes Berg | 1ed32e4 | 2009-12-23 13:15:45 +0100 | [diff] [blame] | 512 | drv_remove_interface(local, &sdata->vif); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 513 | } |
| 514 | |
| 515 | sdata->bss = NULL; |
| 516 | |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 517 | hw_reconf_flags |= __ieee80211_recalc_idle(local); |
| 518 | |
| 519 | ieee80211_recalc_ps(local, -1); |
| 520 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 521 | if (local->open_count == 0) { |
Johannes Berg | ea77f12 | 2009-08-21 14:44:45 +0200 | [diff] [blame] | 522 | ieee80211_clear_tx_pending(local); |
Johannes Berg | 84f6a01 | 2009-08-20 20:02:20 +0200 | [diff] [blame] | 523 | ieee80211_stop_device(local); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 524 | |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 525 | /* no reconfiguring after stop! */ |
| 526 | hw_reconf_flags = 0; |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 527 | } |
| 528 | |
Johannes Berg | e897558 | 2008-10-09 12:18:51 +0200 | [diff] [blame] | 529 | /* do after stop to avoid reconfiguring when we stop anyway */ |
| 530 | if (hw_reconf_flags) |
| 531 | ieee80211_hw_config(local, hw_reconf_flags); |
| 532 | |
Johannes Berg | 5061b0c | 2009-07-14 00:33:34 +0200 | [diff] [blame] | 533 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| 534 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { |
| 535 | skb_queue_walk_safe(&local->pending[i], skb, tmp) { |
| 536 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 537 | if (info->control.vif == &sdata->vif) { |
| 538 | __skb_unlink(skb, &local->pending[i]); |
| 539 | dev_kfree_skb_irq(skb); |
| 540 | } |
| 541 | } |
| 542 | } |
| 543 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| 544 | |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 545 | return 0; |
| 546 | } |
| 547 | |
| 548 | static void ieee80211_set_multicast_list(struct net_device *dev) |
| 549 | { |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 550 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
Johannes Berg | b4a4bf5 | 2008-09-26 13:34:54 +0200 | [diff] [blame] | 551 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 552 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
| 553 | |
| 554 | allmulti = !!(dev->flags & IFF_ALLMULTI); |
| 555 | promisc = !!(dev->flags & IFF_PROMISC); |
| 556 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); |
| 557 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); |
| 558 | |
| 559 | if (allmulti != sdata_allmulti) { |
| 560 | if (dev->flags & IFF_ALLMULTI) |
| 561 | atomic_inc(&local->iff_allmultis); |
| 562 | else |
| 563 | atomic_dec(&local->iff_allmultis); |
| 564 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; |
| 565 | } |
| 566 | |
| 567 | if (promisc != sdata_promisc) { |
| 568 | if (dev->flags & IFF_PROMISC) |
| 569 | atomic_inc(&local->iff_promiscs); |
| 570 | else |
| 571 | atomic_dec(&local->iff_promiscs); |
| 572 | sdata->flags ^= IEEE80211_SDATA_PROMISC; |
| 573 | } |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 574 | spin_lock_bh(&local->filter_lock); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 575 | __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 576 | spin_unlock_bh(&local->filter_lock); |
Johannes Berg | 3ac64be | 2009-08-17 16:16:53 +0200 | [diff] [blame] | 577 | ieee80211_queue_work(&local->hw, &local->reconfig_filter); |
Johannes Berg | 0d143fe | 2008-09-11 00:01:59 +0200 | [diff] [blame] | 578 | } |
| 579 | |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 580 | /* |
| 581 | * Called when the netdev is removed or, by the code below, before |
| 582 | * the interface type changes. |
| 583 | */ |
| 584 | static void ieee80211_teardown_sdata(struct net_device *dev) |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 585 | { |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 586 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 587 | struct ieee80211_local *local = sdata->local; |
| 588 | struct beacon_data *beacon; |
| 589 | struct sk_buff *skb; |
| 590 | int flushed; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 591 | int i; |
| 592 | |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 593 | /* free extra data */ |
| 594 | ieee80211_free_keys(sdata); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 595 | |
Jouni Malinen | aee14ce | 2008-09-09 16:33:15 +0200 | [diff] [blame] | 596 | ieee80211_debugfs_remove_netdev(sdata); |
| 597 | |
Johannes Berg | 988c0f7 | 2008-04-17 19:21:22 +0200 | [diff] [blame] | 598 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 599 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 600 | sdata->fragment_next = 0; |
| 601 | |
| 602 | switch (sdata->vif.type) { |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 603 | case NL80211_IFTYPE_AP: |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 604 | beacon = sdata->u.ap.beacon; |
| 605 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); |
| 606 | synchronize_rcu(); |
| 607 | kfree(beacon); |
| 608 | |
| 609 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { |
| 610 | local->total_ps_buffered--; |
| 611 | dev_kfree_skb(skb); |
| 612 | } |
| 613 | |
| 614 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 615 | case NL80211_IFTYPE_MESH_POINT: |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 616 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 617 | mesh_rmc_free(sdata); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 618 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 619 | case NL80211_IFTYPE_ADHOC: |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 620 | if (WARN_ON(sdata->u.ibss.presp)) |
| 621 | kfree_skb(sdata->u.ibss.presp); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 622 | break; |
| 623 | case NL80211_IFTYPE_STATION: |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 624 | case NL80211_IFTYPE_WDS: |
| 625 | case NL80211_IFTYPE_AP_VLAN: |
| 626 | case NL80211_IFTYPE_MONITOR: |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 627 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 628 | case NL80211_IFTYPE_UNSPECIFIED: |
| 629 | case __NL80211_IFTYPE_AFTER_LAST: |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 630 | BUG(); |
| 631 | break; |
| 632 | } |
| 633 | |
| 634 | flushed = sta_info_flush(local, sdata); |
| 635 | WARN_ON(flushed); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 636 | } |
| 637 | |
Johannes Berg | cf0277e | 2010-01-05 18:00:58 +0100 | [diff] [blame] | 638 | static u16 ieee80211_netdev_select_queue(struct net_device *dev, |
| 639 | struct sk_buff *skb) |
| 640 | { |
| 641 | return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); |
| 642 | } |
| 643 | |
Johannes Berg | 587e729 | 2009-01-30 13:35:22 +0100 | [diff] [blame] | 644 | static const struct net_device_ops ieee80211_dataif_ops = { |
| 645 | .ndo_open = ieee80211_open, |
| 646 | .ndo_stop = ieee80211_stop, |
| 647 | .ndo_uninit = ieee80211_teardown_sdata, |
| 648 | .ndo_start_xmit = ieee80211_subif_start_xmit, |
| 649 | .ndo_set_multicast_list = ieee80211_set_multicast_list, |
| 650 | .ndo_change_mtu = ieee80211_change_mtu, |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 651 | .ndo_set_mac_address = ieee80211_change_mac, |
Johannes Berg | cf0277e | 2010-01-05 18:00:58 +0100 | [diff] [blame] | 652 | .ndo_select_queue = ieee80211_netdev_select_queue, |
Johannes Berg | 587e729 | 2009-01-30 13:35:22 +0100 | [diff] [blame] | 653 | }; |
| 654 | |
Johannes Berg | cf0277e | 2010-01-05 18:00:58 +0100 | [diff] [blame] | 655 | static u16 ieee80211_monitor_select_queue(struct net_device *dev, |
| 656 | struct sk_buff *skb) |
| 657 | { |
| 658 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 659 | struct ieee80211_local *local = sdata->local; |
| 660 | struct ieee80211_hdr *hdr; |
| 661 | struct ieee80211_radiotap_header *rtap = (void *)skb->data; |
Felix Fietkau | 193e70e | 2010-01-11 06:47:00 +0100 | [diff] [blame] | 662 | u8 *p; |
Johannes Berg | cf0277e | 2010-01-05 18:00:58 +0100 | [diff] [blame] | 663 | |
| 664 | if (local->hw.queues < 4) |
| 665 | return 0; |
| 666 | |
| 667 | if (skb->len < 4 || |
Johannes Berg | b49bb57 | 2010-01-08 19:00:00 +0100 | [diff] [blame] | 668 | skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) |
Johannes Berg | cf0277e | 2010-01-05 18:00:58 +0100 | [diff] [blame] | 669 | return 0; /* doesn't matter, frame will be dropped */ |
| 670 | |
Johannes Berg | b49bb57 | 2010-01-08 19:00:00 +0100 | [diff] [blame] | 671 | hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); |
Johannes Berg | cf0277e | 2010-01-05 18:00:58 +0100 | [diff] [blame] | 672 | |
Felix Fietkau | 861a57c | 2010-01-12 04:08:26 +0100 | [diff] [blame] | 673 | if (!ieee80211_is_data(hdr->frame_control)) { |
Johannes Berg | cf0277e | 2010-01-05 18:00:58 +0100 | [diff] [blame] | 674 | skb->priority = 7; |
| 675 | return ieee802_1d_to_ac[skb->priority]; |
| 676 | } |
Felix Fietkau | 861a57c | 2010-01-12 04:08:26 +0100 | [diff] [blame] | 677 | if (!ieee80211_is_data_qos(hdr->frame_control)) { |
| 678 | skb->priority = 0; |
| 679 | return ieee802_1d_to_ac[skb->priority]; |
| 680 | } |
Johannes Berg | cf0277e | 2010-01-05 18:00:58 +0100 | [diff] [blame] | 681 | |
Felix Fietkau | 193e70e | 2010-01-11 06:47:00 +0100 | [diff] [blame] | 682 | p = ieee80211_get_qos_ctl(hdr); |
| 683 | skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK; |
| 684 | |
Johannes Berg | cf0277e | 2010-01-05 18:00:58 +0100 | [diff] [blame] | 685 | return ieee80211_downgrade_queue(local, skb); |
| 686 | } |
| 687 | |
Johannes Berg | 587e729 | 2009-01-30 13:35:22 +0100 | [diff] [blame] | 688 | static const struct net_device_ops ieee80211_monitorif_ops = { |
| 689 | .ndo_open = ieee80211_open, |
| 690 | .ndo_stop = ieee80211_stop, |
| 691 | .ndo_uninit = ieee80211_teardown_sdata, |
| 692 | .ndo_start_xmit = ieee80211_monitor_start_xmit, |
| 693 | .ndo_set_multicast_list = ieee80211_set_multicast_list, |
| 694 | .ndo_change_mtu = ieee80211_change_mtu, |
| 695 | .ndo_set_mac_address = eth_mac_addr, |
Johannes Berg | cf0277e | 2010-01-05 18:00:58 +0100 | [diff] [blame] | 696 | .ndo_select_queue = ieee80211_monitor_select_queue, |
Johannes Berg | 587e729 | 2009-01-30 13:35:22 +0100 | [diff] [blame] | 697 | }; |
| 698 | |
| 699 | static void ieee80211_if_setup(struct net_device *dev) |
| 700 | { |
| 701 | ether_setup(dev); |
| 702 | dev->netdev_ops = &ieee80211_dataif_ops; |
Johannes Berg | 587e729 | 2009-01-30 13:35:22 +0100 | [diff] [blame] | 703 | dev->destructor = free_netdev; |
| 704 | } |
| 705 | |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 706 | static void ieee80211_iface_work(struct work_struct *work) |
| 707 | { |
| 708 | struct ieee80211_sub_if_data *sdata = |
| 709 | container_of(work, struct ieee80211_sub_if_data, work); |
| 710 | struct ieee80211_local *local = sdata->local; |
| 711 | struct sk_buff *skb; |
Johannes Berg | 344eec6 | 2010-06-10 10:21:36 +0200 | [diff] [blame] | 712 | struct sta_info *sta; |
Johannes Berg | c1475ca | 2010-06-10 10:21:37 +0200 | [diff] [blame] | 713 | struct ieee80211_ra_tid *ra_tid; |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 714 | |
| 715 | if (!ieee80211_sdata_running(sdata)) |
| 716 | return; |
| 717 | |
| 718 | if (local->scanning) |
| 719 | return; |
| 720 | |
| 721 | /* |
| 722 | * ieee80211_queue_work() should have picked up most cases, |
| 723 | * here we'll pick the rest. |
| 724 | */ |
| 725 | if (WARN(local->suspended, |
| 726 | "interface work scheduled while going to suspend\n")) |
| 727 | return; |
| 728 | |
| 729 | /* first process frames */ |
| 730 | while ((skb = skb_dequeue(&sdata->skb_queue))) { |
Johannes Berg | bed7ee6e | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 731 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
| 732 | |
Johannes Berg | c1475ca | 2010-06-10 10:21:37 +0200 | [diff] [blame] | 733 | if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { |
| 734 | ra_tid = (void *)&skb->cb; |
| 735 | ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, |
| 736 | ra_tid->tid); |
| 737 | } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { |
| 738 | ra_tid = (void *)&skb->cb; |
| 739 | ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, |
| 740 | ra_tid->tid); |
| 741 | } else if (ieee80211_is_action(mgmt->frame_control) && |
| 742 | mgmt->u.action.category == WLAN_CATEGORY_BACK) { |
Johannes Berg | bed7ee6e | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 743 | int len = skb->len; |
Johannes Berg | bed7ee6e | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 744 | |
Johannes Berg | a93e364 | 2010-06-10 10:21:46 +0200 | [diff] [blame] | 745 | mutex_lock(&local->sta_mtx); |
Felix Fietkau | 875ae5f | 2010-07-17 15:59:07 +0200 | [diff] [blame] | 746 | sta = sta_info_get_bss(sdata, mgmt->sa); |
Johannes Berg | bed7ee6e | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 747 | if (sta) { |
| 748 | switch (mgmt->u.action.u.addba_req.action_code) { |
| 749 | case WLAN_ACTION_ADDBA_REQ: |
| 750 | ieee80211_process_addba_request( |
| 751 | local, sta, mgmt, len); |
| 752 | break; |
| 753 | case WLAN_ACTION_ADDBA_RESP: |
| 754 | ieee80211_process_addba_resp(local, sta, |
| 755 | mgmt, len); |
| 756 | break; |
| 757 | case WLAN_ACTION_DELBA: |
| 758 | ieee80211_process_delba(sdata, sta, |
| 759 | mgmt, len); |
| 760 | break; |
| 761 | default: |
| 762 | WARN_ON(1); |
| 763 | break; |
| 764 | } |
| 765 | } |
Johannes Berg | a93e364 | 2010-06-10 10:21:46 +0200 | [diff] [blame] | 766 | mutex_unlock(&local->sta_mtx); |
Johannes Berg | 344eec6 | 2010-06-10 10:21:36 +0200 | [diff] [blame] | 767 | } else if (ieee80211_is_data_qos(mgmt->frame_control)) { |
| 768 | struct ieee80211_hdr *hdr = (void *)mgmt; |
| 769 | /* |
| 770 | * So the frame isn't mgmt, but frame_control |
| 771 | * is at the right place anyway, of course, so |
| 772 | * the if statement is correct. |
| 773 | * |
| 774 | * Warn if we have other data frame types here, |
| 775 | * they must not get here. |
| 776 | */ |
| 777 | WARN_ON(hdr->frame_control & |
| 778 | cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); |
| 779 | WARN_ON(!(hdr->seq_ctrl & |
| 780 | cpu_to_le16(IEEE80211_SCTL_FRAG))); |
| 781 | /* |
| 782 | * This was a fragment of a frame, received while |
| 783 | * a block-ack session was active. That cannot be |
| 784 | * right, so terminate the session. |
| 785 | */ |
Johannes Berg | a93e364 | 2010-06-10 10:21:46 +0200 | [diff] [blame] | 786 | mutex_lock(&local->sta_mtx); |
Felix Fietkau | 875ae5f | 2010-07-17 15:59:07 +0200 | [diff] [blame] | 787 | sta = sta_info_get_bss(sdata, mgmt->sa); |
Johannes Berg | 344eec6 | 2010-06-10 10:21:36 +0200 | [diff] [blame] | 788 | if (sta) { |
| 789 | u16 tid = *ieee80211_get_qos_ctl(hdr) & |
| 790 | IEEE80211_QOS_CTL_TID_MASK; |
| 791 | |
| 792 | __ieee80211_stop_rx_ba_session( |
| 793 | sta, tid, WLAN_BACK_RECIPIENT, |
| 794 | WLAN_REASON_QSTA_REQUIRE_SETUP); |
| 795 | } |
Johannes Berg | a93e364 | 2010-06-10 10:21:46 +0200 | [diff] [blame] | 796 | mutex_unlock(&local->sta_mtx); |
Johannes Berg | bed7ee6e | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 797 | } else switch (sdata->vif.type) { |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 798 | case NL80211_IFTYPE_STATION: |
| 799 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
| 800 | break; |
| 801 | case NL80211_IFTYPE_ADHOC: |
| 802 | ieee80211_ibss_rx_queued_mgmt(sdata, skb); |
| 803 | break; |
| 804 | case NL80211_IFTYPE_MESH_POINT: |
| 805 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
| 806 | break; |
| 807 | ieee80211_mesh_rx_queued_mgmt(sdata, skb); |
| 808 | break; |
| 809 | default: |
| 810 | WARN(1, "frame for unexpected interface type"); |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 811 | break; |
| 812 | } |
Johannes Berg | 36b3a62 | 2010-06-10 10:21:33 +0200 | [diff] [blame] | 813 | |
| 814 | kfree_skb(skb); |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 815 | } |
| 816 | |
| 817 | /* then other type-dependent work */ |
| 818 | switch (sdata->vif.type) { |
| 819 | case NL80211_IFTYPE_STATION: |
| 820 | ieee80211_sta_work(sdata); |
| 821 | break; |
| 822 | case NL80211_IFTYPE_ADHOC: |
| 823 | ieee80211_ibss_work(sdata); |
| 824 | break; |
| 825 | case NL80211_IFTYPE_MESH_POINT: |
| 826 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
| 827 | break; |
| 828 | ieee80211_mesh_work(sdata); |
| 829 | break; |
| 830 | default: |
| 831 | break; |
| 832 | } |
| 833 | } |
| 834 | |
| 835 | |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 836 | /* |
| 837 | * Helper function to initialise an interface to a specific type. |
| 838 | */ |
| 839 | static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 840 | enum nl80211_iftype type) |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 841 | { |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 842 | /* clear type-dependent union */ |
| 843 | memset(&sdata->u, 0, sizeof(sdata->u)); |
| 844 | |
| 845 | /* and set some type-dependent values */ |
| 846 | sdata->vif.type = type; |
Johannes Berg | 587e729 | 2009-01-30 13:35:22 +0100 | [diff] [blame] | 847 | sdata->dev->netdev_ops = &ieee80211_dataif_ops; |
Johannes Berg | 60719ff | 2008-09-16 14:55:09 +0200 | [diff] [blame] | 848 | sdata->wdev.iftype = type; |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 849 | |
| 850 | /* only monitor differs */ |
| 851 | sdata->dev->type = ARPHRD_ETHER; |
| 852 | |
Johannes Berg | 35f20c1 | 2010-06-10 10:21:30 +0200 | [diff] [blame] | 853 | skb_queue_head_init(&sdata->skb_queue); |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 854 | INIT_WORK(&sdata->work, ieee80211_iface_work); |
Johannes Berg | 35f20c1 | 2010-06-10 10:21:30 +0200 | [diff] [blame] | 855 | |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 856 | switch (type) { |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 857 | case NL80211_IFTYPE_AP: |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 858 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); |
| 859 | INIT_LIST_HEAD(&sdata->u.ap.vlans); |
| 860 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 861 | case NL80211_IFTYPE_STATION: |
Johannes Berg | 9c6bd79 | 2008-09-11 00:01:52 +0200 | [diff] [blame] | 862 | ieee80211_sta_setup_sdata(sdata); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 863 | break; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 864 | case NL80211_IFTYPE_ADHOC: |
| 865 | ieee80211_ibss_setup_sdata(sdata); |
| 866 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 867 | case NL80211_IFTYPE_MESH_POINT: |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 868 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
| 869 | ieee80211_mesh_init_sdata(sdata); |
| 870 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 871 | case NL80211_IFTYPE_MONITOR: |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 872 | sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
Johannes Berg | 587e729 | 2009-01-30 13:35:22 +0100 | [diff] [blame] | 873 | sdata->dev->netdev_ops = &ieee80211_monitorif_ops; |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 874 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | |
| 875 | MONITOR_FLAG_OTHER_BSS; |
| 876 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 877 | case NL80211_IFTYPE_WDS: |
| 878 | case NL80211_IFTYPE_AP_VLAN: |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 879 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 880 | case NL80211_IFTYPE_UNSPECIFIED: |
| 881 | case __NL80211_IFTYPE_AFTER_LAST: |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 882 | BUG(); |
| 883 | break; |
| 884 | } |
| 885 | |
| 886 | ieee80211_debugfs_add_netdev(sdata); |
| 887 | } |
| 888 | |
Johannes Berg | f3947e2 | 2008-07-09 14:40:36 +0200 | [diff] [blame] | 889 | int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 890 | enum nl80211_iftype type) |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 891 | { |
Johannes Berg | f3947e2 | 2008-07-09 14:40:36 +0200 | [diff] [blame] | 892 | ASSERT_RTNL(); |
| 893 | |
| 894 | if (type == sdata->vif.type) |
| 895 | return 0; |
| 896 | |
Johannes Berg | e60c774 | 2008-11-26 23:31:40 +0100 | [diff] [blame] | 897 | /* Setting ad-hoc mode on non-IBSS channel is not supported. */ |
Pavel Roskin | dcebf45 | 2008-12-22 16:39:36 -0500 | [diff] [blame] | 898 | if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && |
| 899 | type == NL80211_IFTYPE_ADHOC) |
Johannes Berg | e60c774 | 2008-11-26 23:31:40 +0100 | [diff] [blame] | 900 | return -EOPNOTSUPP; |
| 901 | |
Johannes Berg | f3947e2 | 2008-07-09 14:40:36 +0200 | [diff] [blame] | 902 | /* |
| 903 | * We could, here, on changes between IBSS/STA/MESH modes, |
| 904 | * invoke an MLME function instead that disassociates etc. |
| 905 | * and goes into the requested mode. |
| 906 | */ |
| 907 | |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 908 | if (ieee80211_sdata_running(sdata)) |
Johannes Berg | f3947e2 | 2008-07-09 14:40:36 +0200 | [diff] [blame] | 909 | return -EBUSY; |
| 910 | |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 911 | /* Purge and reset type-dependent state. */ |
| 912 | ieee80211_teardown_sdata(sdata->dev); |
| 913 | ieee80211_setup_sdata(sdata, type); |
| 914 | |
| 915 | /* reset some values that shouldn't be kept across type changes */ |
Johannes Berg | bda3933 | 2008-10-11 01:51:51 +0200 | [diff] [blame] | 916 | sdata->vif.bss_conf.basic_rates = |
Johannes Berg | 96dd22a | 2008-09-11 00:01:57 +0200 | [diff] [blame] | 917 | ieee80211_mandatory_rates(sdata->local, |
| 918 | sdata->local->hw.conf.channel->band); |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 919 | sdata->drop_unencrypted = 0; |
Johannes Berg | 9bc383d | 2009-11-19 11:55:19 +0100 | [diff] [blame] | 920 | if (type == NL80211_IFTYPE_STATION) |
| 921 | sdata->u.mgd.use_4addr = false; |
Johannes Berg | f3947e2 | 2008-07-09 14:40:36 +0200 | [diff] [blame] | 922 | |
| 923 | return 0; |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 924 | } |
| 925 | |
Johannes Berg | fa9029f | 2010-02-25 15:13:11 +0100 | [diff] [blame] | 926 | static void ieee80211_assign_perm_addr(struct ieee80211_local *local, |
| 927 | struct net_device *dev, |
| 928 | enum nl80211_iftype type) |
| 929 | { |
| 930 | struct ieee80211_sub_if_data *sdata; |
| 931 | u64 mask, start, addr, val, inc; |
| 932 | u8 *m; |
| 933 | u8 tmp_addr[ETH_ALEN]; |
| 934 | int i; |
| 935 | |
| 936 | /* default ... something at least */ |
| 937 | memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); |
| 938 | |
| 939 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && |
| 940 | local->hw.wiphy->n_addresses <= 1) |
| 941 | return; |
| 942 | |
| 943 | |
| 944 | mutex_lock(&local->iflist_mtx); |
| 945 | |
| 946 | switch (type) { |
| 947 | case NL80211_IFTYPE_MONITOR: |
| 948 | /* doesn't matter */ |
| 949 | break; |
| 950 | case NL80211_IFTYPE_WDS: |
| 951 | case NL80211_IFTYPE_AP_VLAN: |
| 952 | /* match up with an AP interface */ |
| 953 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 954 | if (sdata->vif.type != NL80211_IFTYPE_AP) |
| 955 | continue; |
| 956 | memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN); |
| 957 | break; |
| 958 | } |
| 959 | /* keep default if no AP interface present */ |
| 960 | break; |
| 961 | default: |
| 962 | /* assign a new address if possible -- try n_addresses first */ |
| 963 | for (i = 0; i < local->hw.wiphy->n_addresses; i++) { |
| 964 | bool used = false; |
| 965 | |
| 966 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 967 | if (memcmp(local->hw.wiphy->addresses[i].addr, |
| 968 | sdata->vif.addr, ETH_ALEN) == 0) { |
| 969 | used = true; |
| 970 | break; |
| 971 | } |
| 972 | } |
| 973 | |
| 974 | if (!used) { |
| 975 | memcpy(dev->perm_addr, |
| 976 | local->hw.wiphy->addresses[i].addr, |
| 977 | ETH_ALEN); |
| 978 | break; |
| 979 | } |
| 980 | } |
| 981 | |
| 982 | /* try mask if available */ |
| 983 | if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) |
| 984 | break; |
| 985 | |
| 986 | m = local->hw.wiphy->addr_mask; |
| 987 | mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
| 988 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | |
| 989 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); |
| 990 | |
| 991 | if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { |
| 992 | /* not a contiguous mask ... not handled now! */ |
| 993 | printk(KERN_DEBUG "not contiguous\n"); |
| 994 | break; |
| 995 | } |
| 996 | |
| 997 | m = local->hw.wiphy->perm_addr; |
| 998 | start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
| 999 | ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | |
| 1000 | ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); |
| 1001 | |
| 1002 | inc = 1ULL<<__ffs64(mask); |
| 1003 | val = (start & mask); |
| 1004 | addr = (start & ~mask) | (val & mask); |
| 1005 | do { |
| 1006 | bool used = false; |
| 1007 | |
| 1008 | tmp_addr[5] = addr >> 0*8; |
| 1009 | tmp_addr[4] = addr >> 1*8; |
| 1010 | tmp_addr[3] = addr >> 2*8; |
| 1011 | tmp_addr[2] = addr >> 3*8; |
| 1012 | tmp_addr[1] = addr >> 4*8; |
| 1013 | tmp_addr[0] = addr >> 5*8; |
| 1014 | |
| 1015 | val += inc; |
| 1016 | |
| 1017 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 1018 | if (memcmp(tmp_addr, sdata->vif.addr, |
| 1019 | ETH_ALEN) == 0) { |
| 1020 | used = true; |
| 1021 | break; |
| 1022 | } |
| 1023 | } |
| 1024 | |
| 1025 | if (!used) { |
| 1026 | memcpy(dev->perm_addr, tmp_addr, ETH_ALEN); |
| 1027 | break; |
| 1028 | } |
| 1029 | addr = (start & ~mask) | (val & mask); |
| 1030 | } while (addr != start); |
| 1031 | |
| 1032 | break; |
| 1033 | } |
| 1034 | |
| 1035 | mutex_unlock(&local->iflist_mtx); |
| 1036 | } |
| 1037 | |
Johannes Berg | 3e122be | 2008-07-09 14:40:34 +0200 | [diff] [blame] | 1038 | int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1039 | struct net_device **new_dev, enum nl80211_iftype type, |
Luis Carlos Cobo | ee38585 | 2008-02-23 15:17:11 +0100 | [diff] [blame] | 1040 | struct vif_params *params) |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1041 | { |
| 1042 | struct net_device *ndev; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1043 | struct ieee80211_sub_if_data *sdata = NULL; |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 1044 | int ret, i; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1045 | |
| 1046 | ASSERT_RTNL(); |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 1047 | |
Johannes Berg | cf0277e | 2010-01-05 18:00:58 +0100 | [diff] [blame] | 1048 | ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size, |
| 1049 | name, ieee80211_if_setup, local->hw.queues); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1050 | if (!ndev) |
| 1051 | return -ENOMEM; |
Johannes Berg | a272a72 | 2009-07-14 00:33:36 +0200 | [diff] [blame] | 1052 | dev_net_set(ndev, wiphy_net(local->hw.wiphy)); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1053 | |
Johannes Berg | f3994ec | 2008-05-12 20:51:44 -0700 | [diff] [blame] | 1054 | ndev->needed_headroom = local->tx_headroom + |
| 1055 | 4*6 /* four MAC addresses */ |
| 1056 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ |
| 1057 | + 6 /* mesh */ |
| 1058 | + 8 /* rfc1042/bridge tunnel */ |
| 1059 | - ETH_HLEN /* ethernet hard_header_len */ |
| 1060 | + IEEE80211_ENCRYPT_HEADROOM; |
| 1061 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; |
| 1062 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1063 | ret = dev_alloc_name(ndev, ndev->name); |
| 1064 | if (ret < 0) |
| 1065 | goto fail; |
| 1066 | |
Johannes Berg | fa9029f | 2010-02-25 15:13:11 +0100 | [diff] [blame] | 1067 | ieee80211_assign_perm_addr(local, ndev, type); |
| 1068 | memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1069 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); |
| 1070 | |
Johannes Berg | 3e122be | 2008-07-09 14:40:34 +0200 | [diff] [blame] | 1071 | /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ |
| 1072 | sdata = netdev_priv(ndev); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1073 | ndev->ieee80211_ptr = &sdata->wdev; |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 1074 | memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); |
| 1075 | memcpy(sdata->name, ndev->name, IFNAMSIZ); |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 1076 | |
| 1077 | /* initialise type-independent data */ |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1078 | sdata->wdev.wiphy = local->hw.wiphy; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1079 | sdata->local = local; |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 1080 | sdata->dev = ndev; |
Juuso Oikarinen | 6854296 | 2010-06-09 13:43:26 +0300 | [diff] [blame] | 1081 | #ifdef CONFIG_INET |
| 1082 | sdata->arp_filter_state = true; |
| 1083 | #endif |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 1084 | |
| 1085 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
| 1086 | skb_queue_head_init(&sdata->fragments[i].skb_list); |
| 1087 | |
| 1088 | INIT_LIST_HEAD(&sdata->key_list); |
| 1089 | |
Jouni Malinen | 37eb0b1 | 2010-01-06 13:09:08 +0200 | [diff] [blame] | 1090 | for (i = 0; i < IEEE80211_NUM_BANDS; i++) { |
| 1091 | struct ieee80211_supported_band *sband; |
| 1092 | sband = local->hw.wiphy->bands[i]; |
| 1093 | sdata->rc_rateidx_mask[i] = |
| 1094 | sband ? (1 << sband->n_bitrates) - 1 : 0; |
| 1095 | } |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 1096 | |
| 1097 | /* setup type-dependent data */ |
| 1098 | ieee80211_setup_sdata(sdata, type); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1099 | |
Johannes Berg | 9bc383d | 2009-11-19 11:55:19 +0100 | [diff] [blame] | 1100 | if (params) { |
| 1101 | ndev->ieee80211_ptr->use_4addr = params->use_4addr; |
| 1102 | if (type == NL80211_IFTYPE_STATION) |
| 1103 | sdata->u.mgd.use_4addr = params->use_4addr; |
| 1104 | } |
| 1105 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1106 | ret = register_netdevice(ndev); |
| 1107 | if (ret) |
| 1108 | goto fail; |
| 1109 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 1110 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
| 1111 | params && params->mesh_id_len) |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 1112 | ieee80211_sdata_set_mesh_id(sdata, |
| 1113 | params->mesh_id_len, |
| 1114 | params->mesh_id); |
Luis Carlos Cobo | ee38585 | 2008-02-23 15:17:11 +0100 | [diff] [blame] | 1115 | |
Johannes Berg | c771c9d | 2009-01-23 22:54:03 +0100 | [diff] [blame] | 1116 | mutex_lock(&local->iflist_mtx); |
Johannes Berg | 7901042 | 2007-09-18 17:29:21 -0400 | [diff] [blame] | 1117 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
Johannes Berg | c771c9d | 2009-01-23 22:54:03 +0100 | [diff] [blame] | 1118 | mutex_unlock(&local->iflist_mtx); |
Johannes Berg | 7901042 | 2007-09-18 17:29:21 -0400 | [diff] [blame] | 1119 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1120 | if (new_dev) |
| 1121 | *new_dev = ndev; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1122 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1123 | return 0; |
| 1124 | |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 1125 | fail: |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1126 | free_netdev(ndev); |
| 1127 | return ret; |
| 1128 | } |
| 1129 | |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 1130 | void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1131 | { |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1132 | ASSERT_RTNL(); |
Johannes Berg | 11a843b | 2007-08-28 17:01:55 -0400 | [diff] [blame] | 1133 | |
Johannes Berg | c771c9d | 2009-01-23 22:54:03 +0100 | [diff] [blame] | 1134 | mutex_lock(&sdata->local->iflist_mtx); |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 1135 | list_del_rcu(&sdata->list); |
Johannes Berg | c771c9d | 2009-01-23 22:54:03 +0100 | [diff] [blame] | 1136 | mutex_unlock(&sdata->local->iflist_mtx); |
| 1137 | |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 1138 | synchronize_rcu(); |
Jasper Bryant-Greene | f698d85 | 2008-08-03 12:04:37 +1200 | [diff] [blame] | 1139 | unregister_netdevice(sdata->dev); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1140 | } |
| 1141 | |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 1142 | /* |
| 1143 | * Remove all interfaces, may only be called at hardware unregistration |
| 1144 | * time because it doesn't do RCU-safe list removals. |
| 1145 | */ |
| 1146 | void ieee80211_remove_interfaces(struct ieee80211_local *local) |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1147 | { |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 1148 | struct ieee80211_sub_if_data *sdata, *tmp; |
Eric Dumazet | efe117a | 2009-11-05 11:06:40 +0100 | [diff] [blame] | 1149 | LIST_HEAD(unreg_list); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1150 | |
| 1151 | ASSERT_RTNL(); |
| 1152 | |
Eric Dumazet | efe117a | 2009-11-05 11:06:40 +0100 | [diff] [blame] | 1153 | mutex_lock(&local->iflist_mtx); |
Johannes Berg | 7563652 | 2008-07-09 14:40:35 +0200 | [diff] [blame] | 1154 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
| 1155 | list_del(&sdata->list); |
Johannes Berg | c771c9d | 2009-01-23 22:54:03 +0100 | [diff] [blame] | 1156 | |
Eric Dumazet | efe117a | 2009-11-05 11:06:40 +0100 | [diff] [blame] | 1157 | unregister_netdevice_queue(sdata->dev, &unreg_list); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1158 | } |
Eric Dumazet | efe117a | 2009-11-05 11:06:40 +0100 | [diff] [blame] | 1159 | mutex_unlock(&local->iflist_mtx); |
| 1160 | unregister_netdevice_many(&unreg_list); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1161 | } |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 1162 | |
| 1163 | static u32 ieee80211_idle_off(struct ieee80211_local *local, |
| 1164 | const char *reason) |
| 1165 | { |
| 1166 | if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) |
| 1167 | return 0; |
| 1168 | |
| 1169 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 1170 | printk(KERN_DEBUG "%s: device no longer idle - %s\n", |
| 1171 | wiphy_name(local->hw.wiphy), reason); |
| 1172 | #endif |
| 1173 | |
| 1174 | local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; |
| 1175 | return IEEE80211_CONF_CHANGE_IDLE; |
| 1176 | } |
| 1177 | |
| 1178 | static u32 ieee80211_idle_on(struct ieee80211_local *local) |
| 1179 | { |
| 1180 | if (local->hw.conf.flags & IEEE80211_CONF_IDLE) |
| 1181 | return 0; |
| 1182 | |
| 1183 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 1184 | printk(KERN_DEBUG "%s: device now idle\n", |
| 1185 | wiphy_name(local->hw.wiphy)); |
| 1186 | #endif |
| 1187 | |
Johannes Berg | a80f7c0 | 2009-12-23 13:15:32 +0100 | [diff] [blame] | 1188 | drv_flush(local, false); |
| 1189 | |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 1190 | local->hw.conf.flags |= IEEE80211_CONF_IDLE; |
| 1191 | return IEEE80211_CONF_CHANGE_IDLE; |
| 1192 | } |
| 1193 | |
| 1194 | u32 __ieee80211_recalc_idle(struct ieee80211_local *local) |
| 1195 | { |
| 1196 | struct ieee80211_sub_if_data *sdata; |
| 1197 | int count = 0; |
| 1198 | |
Johannes Berg | af6b637 | 2009-12-23 13:15:35 +0100 | [diff] [blame] | 1199 | if (!list_empty(&local->work_list)) |
| 1200 | return ieee80211_idle_off(local, "working"); |
| 1201 | |
Helmut Schaa | fbe9c42 | 2009-07-23 12:14:04 +0200 | [diff] [blame] | 1202 | if (local->scanning) |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 1203 | return ieee80211_idle_off(local, "scanning"); |
| 1204 | |
| 1205 | list_for_each_entry(sdata, &local->interfaces, list) { |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 1206 | if (!ieee80211_sdata_running(sdata)) |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 1207 | continue; |
| 1208 | /* do not count disabled managed interfaces */ |
| 1209 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
Johannes Berg | af6b637 | 2009-12-23 13:15:35 +0100 | [diff] [blame] | 1210 | !sdata->u.mgd.associated) |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 1211 | continue; |
| 1212 | /* do not count unused IBSS interfaces */ |
| 1213 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
| 1214 | !sdata->u.ibss.ssid_len) |
| 1215 | continue; |
| 1216 | /* count everything else */ |
| 1217 | count++; |
| 1218 | } |
| 1219 | |
| 1220 | if (!count) |
| 1221 | return ieee80211_idle_on(local); |
| 1222 | else |
| 1223 | return ieee80211_idle_off(local, "in use"); |
| 1224 | |
| 1225 | return 0; |
| 1226 | } |
| 1227 | |
| 1228 | void ieee80211_recalc_idle(struct ieee80211_local *local) |
| 1229 | { |
| 1230 | u32 chg; |
| 1231 | |
| 1232 | mutex_lock(&local->iflist_mtx); |
| 1233 | chg = __ieee80211_recalc_idle(local); |
| 1234 | mutex_unlock(&local->iflist_mtx); |
Johannes Berg | 58905ca | 2009-05-07 14:23:01 +0200 | [diff] [blame] | 1235 | if (chg) |
| 1236 | ieee80211_hw_config(local, chg); |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 1237 | } |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 1238 | |
| 1239 | static int netdev_notify(struct notifier_block *nb, |
| 1240 | unsigned long state, |
| 1241 | void *ndev) |
| 1242 | { |
| 1243 | struct net_device *dev = ndev; |
| 1244 | struct ieee80211_sub_if_data *sdata; |
| 1245 | |
| 1246 | if (state != NETDEV_CHANGENAME) |
| 1247 | return 0; |
| 1248 | |
| 1249 | if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) |
| 1250 | return 0; |
| 1251 | |
| 1252 | if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) |
| 1253 | return 0; |
| 1254 | |
| 1255 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 1256 | |
Johannes Berg | 2f5265e | 2010-02-12 10:45:05 +0100 | [diff] [blame] | 1257 | memcpy(sdata->name, dev->name, IFNAMSIZ); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 1258 | |
| 1259 | ieee80211_debugfs_rename_netdev(sdata); |
| 1260 | return 0; |
| 1261 | } |
| 1262 | |
| 1263 | static struct notifier_block mac80211_netdev_notifier = { |
| 1264 | .notifier_call = netdev_notify, |
| 1265 | }; |
| 1266 | |
| 1267 | int ieee80211_iface_init(void) |
| 1268 | { |
| 1269 | return register_netdevice_notifier(&mac80211_netdev_notifier); |
| 1270 | } |
| 1271 | |
| 1272 | void ieee80211_iface_exit(void) |
| 1273 | { |
| 1274 | unregister_netdevice_notifier(&mac80211_netdev_notifier); |
| 1275 | } |