| /* |
| * Interface handling (except master interface) |
| * |
| * Copyright 2002-2005, Instant802 Networks, Inc. |
| * Copyright 2005-2006, Devicescape Software, Inc. |
| * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> |
| * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| #include <linux/kernel.h> |
| #include <linux/if_arp.h> |
| #include <linux/netdevice.h> |
| #include <linux/rtnetlink.h> |
| #include <net/mac80211.h> |
| #include "ieee80211_i.h" |
| #include "sta_info.h" |
| #include "debugfs_netdev.h" |
| #include "mesh.h" |
| #include "led.h" |
| #include "driver-ops.h" |
| |
| /** |
| * DOC: Interface list locking |
| * |
| * The interface list in each struct ieee80211_local is protected |
| * three-fold: |
| * |
| * (1) modifications may only be done under the RTNL |
| * (2) modifications and readers are protected against each other by |
| * the iflist_mtx. |
| * (3) modifications are done in an RCU manner so atomic readers |
| * can traverse the list in RCU-safe blocks. |
| * |
| * As a consequence, reads (traversals) of the list can be protected |
| * by either the RTNL, the iflist_mtx or RCU. |
| */ |
| |
| |
| static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
| { |
| int meshhdrlen; |
| struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| |
| meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0; |
| |
| /* FIX: what would be proper limits for MTU? |
| * This interface uses 802.3 frames. */ |
| if (new_mtu < 256 || |
| new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { |
| return -EINVAL; |
| } |
| |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); |
| #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
| dev->mtu = new_mtu; |
| return 0; |
| } |
| |
| static inline int identical_mac_addr_allowed(int type1, int type2) |
| { |
| return type1 == NL80211_IFTYPE_MONITOR || |
| type2 == NL80211_IFTYPE_MONITOR || |
| (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || |
| (type1 == NL80211_IFTYPE_WDS && |
| (type2 == NL80211_IFTYPE_WDS || |
| type2 == NL80211_IFTYPE_AP)) || |
| (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || |
| (type1 == NL80211_IFTYPE_AP_VLAN && |
| (type2 == NL80211_IFTYPE_AP || |
| type2 == NL80211_IFTYPE_AP_VLAN)); |
| } |
| |
| static int ieee80211_open(struct net_device *dev) |
| { |
| struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| struct ieee80211_sub_if_data *nsdata; |
| struct ieee80211_local *local = sdata->local; |
| struct sta_info *sta; |
| struct ieee80211_if_init_conf conf; |
| u32 changed = 0; |
| int res; |
| u32 hw_reconf_flags = 0; |
| u8 null_addr[ETH_ALEN] = {0}; |
| |
| /* fail early if user set an invalid address */ |
| if (compare_ether_addr(dev->dev_addr, null_addr) && |
| !is_valid_ether_addr(dev->dev_addr)) |
| return -EADDRNOTAVAIL; |
| |
| /* we hold the RTNL here so can safely walk the list */ |
| list_for_each_entry(nsdata, &local->interfaces, list) { |
| struct net_device *ndev = nsdata->dev; |
| |
| if (ndev != dev && netif_running(ndev)) { |
| /* |
| * Allow only a single IBSS interface to be up at any |
| * time. This is restricted because beacon distribution |
| * cannot work properly if both are in the same IBSS. |
| * |
| * To remove this restriction we'd have to disallow them |
| * from setting the same SSID on different IBSS interfaces |
| * belonging to the same hardware. Then, however, we're |
| * faced with having to adopt two different TSF timers... |
| */ |
| if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
| nsdata->vif.type == NL80211_IFTYPE_ADHOC) |
| return -EBUSY; |
| |
| /* |
| * The remaining checks are only performed for interfaces |
| * with the same MAC address. |
| */ |
| if (compare_ether_addr(dev->dev_addr, ndev->dev_addr)) |
| continue; |
| |
| /* |
| * check whether it may have the same address |
| */ |
| if (!identical_mac_addr_allowed(sdata->vif.type, |
| nsdata->vif.type)) |
| return -ENOTUNIQ; |
| |
| /* |
| * can only add VLANs to enabled APs |
| */ |
| if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
| nsdata->vif.type == NL80211_IFTYPE_AP) |
| sdata->bss = &nsdata->u.ap; |
| } |
| } |
| |
| switch (sdata->vif.type) { |
| case NL80211_IFTYPE_WDS: |
| if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) |
| return -ENOLINK; |
| break; |
| case NL80211_IFTYPE_AP_VLAN: |
| if (!sdata->bss) |
| return -ENOLINK; |
| list_add(&sdata->u.vlan.list, &sdata->bss->vlans); |
| break; |
| case NL80211_IFTYPE_AP: |
| sdata->bss = &sdata->u.ap; |
| break; |
| case NL80211_IFTYPE_MESH_POINT: |
| if (!ieee80211_vif_is_mesh(&sdata->vif)) |
| break; |
| /* mesh ifaces must set allmulti to forward mcast traffic */ |
| atomic_inc(&local->iff_allmultis); |
| break; |
| case NL80211_IFTYPE_STATION: |
| case NL80211_IFTYPE_MONITOR: |
| case NL80211_IFTYPE_ADHOC: |
| /* no special treatment */ |
| break; |
| case NL80211_IFTYPE_UNSPECIFIED: |
| case __NL80211_IFTYPE_AFTER_LAST: |
| /* cannot happen */ |
| WARN_ON(1); |
| break; |
| } |
| |
| if (local->open_count == 0) { |
| res = drv_start(local); |
| if (res) |
| goto err_del_bss; |
| /* we're brought up, everything changes */ |
| hw_reconf_flags = ~0; |
| ieee80211_led_radio(local, true); |
| } |
| |
| /* |
| * Check all interfaces and copy the hopefully now-present |
| * MAC address to those that have the special null one. |
| */ |
| list_for_each_entry(nsdata, &local->interfaces, list) { |
| struct net_device *ndev = nsdata->dev; |
| |
| /* |
| * No need to check netif_running since we do not allow |
| * it to start up with this invalid address. |
| */ |
| if (compare_ether_addr(null_addr, ndev->dev_addr) == 0) |
| memcpy(ndev->dev_addr, |
| local->hw.wiphy->perm_addr, |
| ETH_ALEN); |
| } |
| |
| /* |
| * Validate the MAC address for this device. |
| */ |
| if (!is_valid_ether_addr(dev->dev_addr)) { |
| if (!local->open_count) |
| drv_stop(local); |
| return -EADDRNOTAVAIL; |
| } |
| |
| switch (sdata->vif.type) { |
| case NL80211_IFTYPE_AP_VLAN: |
| /* no need to tell driver */ |
| break; |
| case NL80211_IFTYPE_MONITOR: |
| if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { |
| local->cooked_mntrs++; |
| break; |
| } |
| |
| /* must be before the call to ieee80211_configure_filter */ |
| local->monitors++; |
| if (local->monitors == 1) { |
| local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; |
| hw_reconf_flags |= IEEE80211_CONF_CHANGE_RADIOTAP; |
| } |
| |
| if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) |
| local->fif_fcsfail++; |
| if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) |
| local->fif_plcpfail++; |
| if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) |
| local->fif_control++; |
| if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
| local->fif_other_bss++; |
| |
| spin_lock_bh(&local->filter_lock); |
| ieee80211_configure_filter(local); |
| spin_unlock_bh(&local->filter_lock); |
| break; |
| default: |
| conf.vif = &sdata->vif; |
| conf.type = sdata->vif.type; |
| conf.mac_addr = dev->dev_addr; |
| res = drv_add_interface(local, &conf); |
| if (res) |
| goto err_stop; |
| |
| if (ieee80211_vif_is_mesh(&sdata->vif)) { |
| local->fif_other_bss++; |
| spin_lock_bh(&local->filter_lock); |
| ieee80211_configure_filter(local); |
| spin_unlock_bh(&local->filter_lock); |
| |
| ieee80211_start_mesh(sdata); |
| } |
| changed |= ieee80211_reset_erp_info(sdata); |
| ieee80211_bss_info_change_notify(sdata, changed); |
| ieee80211_enable_keys(sdata); |
| |
| if (sdata->vif.type == NL80211_IFTYPE_STATION) |
| netif_carrier_off(dev); |
| else |
| netif_carrier_on(dev); |
| } |
| |
| if (sdata->vif.type == NL80211_IFTYPE_WDS) { |
| /* Create STA entry for the WDS peer */ |
| sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, |
| GFP_KERNEL); |
| if (!sta) { |
| res = -ENOMEM; |
| goto err_del_interface; |
| } |
| |
| /* no locking required since STA is not live yet */ |
| sta->flags |= WLAN_STA_AUTHORIZED; |
| |
| res = sta_info_insert(sta); |
| if (res) { |
| /* STA has been freed */ |
| goto err_del_interface; |
| } |
| } |
| |
| if (local->open_count == 0) { |
| tasklet_enable(&local->tx_pending_tasklet); |
| tasklet_enable(&local->tasklet); |
| } |
| |
| /* |
| * set_multicast_list will be invoked by the networking core |
| * which will check whether any increments here were done in |
| * error and sync them down to the hardware as filter flags. |
| */ |
| if (sdata->flags & IEEE80211_SDATA_ALLMULTI) |
| atomic_inc(&local->iff_allmultis); |
| |
| if (sdata->flags & IEEE80211_SDATA_PROMISC) |
| atomic_inc(&local->iff_promiscs); |
| |
| hw_reconf_flags |= __ieee80211_recalc_idle(local); |
| |
| local->open_count++; |
| if (hw_reconf_flags) { |
| ieee80211_hw_config(local, hw_reconf_flags); |
| /* |
| * set default queue parameters so drivers don't |
| * need to initialise the hardware if the hardware |
| * doesn't start up with sane defaults |
| */ |
| ieee80211_set_wmm_default(sdata); |
| } |
| |
| ieee80211_recalc_ps(local, -1); |
| |
| /* |
| * ieee80211_sta_work is disabled while network interface |
| * is down. Therefore, some configuration changes may not |
| * yet be effective. Trigger execution of ieee80211_sta_work |
| * to fix this. |
| */ |
| if (sdata->vif.type == NL80211_IFTYPE_STATION) |
| queue_work(local->hw.workqueue, &sdata->u.mgd.work); |
| |
| netif_tx_start_all_queues(dev); |
| |
| return 0; |
| err_del_interface: |
| drv_remove_interface(local, &conf); |
| err_stop: |
| if (!local->open_count) |
| drv_stop(local); |
| err_del_bss: |
| sdata->bss = NULL; |
| if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
| list_del(&sdata->u.vlan.list); |
| return res; |
| } |
| |
| static int ieee80211_stop(struct net_device *dev) |
| { |
| struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_if_init_conf conf; |
| struct sta_info *sta; |
| unsigned long flags; |
| struct sk_buff *skb, *tmp; |
| u32 hw_reconf_flags = 0; |
| int i; |
| |
| /* |
| * Stop TX on this interface first. |
| */ |
| netif_tx_stop_all_queues(dev); |
| |
| /* |
| * Now delete all active aggregation sessions. |
| */ |
| rcu_read_lock(); |
| |
| list_for_each_entry_rcu(sta, &local->sta_list, list) { |
| if (sta->sdata == sdata) |
| ieee80211_sta_tear_down_BA_sessions(sta); |
| } |
| |
| rcu_read_unlock(); |
| |
| /* |
| * Remove all stations associated with this interface. |
| * |
| * This must be done before calling ops->remove_interface() |
| * because otherwise we can later invoke ops->sta_notify() |
| * whenever the STAs are removed, and that invalidates driver |
| * assumptions about always getting a vif pointer that is valid |
| * (because if we remove a STA after ops->remove_interface() |
| * the driver will have removed the vif info already!) |
| * |
| * We could relax this and only unlink the stations from the |
| * hash table and list but keep them on a per-sdata list that |
| * will be inserted back again when the interface is brought |
| * up again, but I don't currently see a use case for that, |
| * except with WDS which gets a STA entry created when it is |
| * brought up. |
| */ |
| sta_info_flush(local, sdata); |
| |
| /* |
| * Don't count this interface for promisc/allmulti while it |
| * is down. dev_mc_unsync() will invoke set_multicast_list |
| * on the master interface which will sync these down to the |
| * hardware as filter flags. |
| */ |
| if (sdata->flags & IEEE80211_SDATA_ALLMULTI) |
| atomic_dec(&local->iff_allmultis); |
| |
| if (sdata->flags & IEEE80211_SDATA_PROMISC) |
| atomic_dec(&local->iff_promiscs); |
| |
| netif_addr_lock_bh(dev); |
| spin_lock_bh(&local->filter_lock); |
| __dev_addr_unsync(&local->mc_list, &local->mc_count, |
| &dev->mc_list, &dev->mc_count); |
| ieee80211_configure_filter(local); |
| spin_unlock_bh(&local->filter_lock); |
| netif_addr_unlock_bh(dev); |
| |
| del_timer_sync(&local->dynamic_ps_timer); |
| cancel_work_sync(&local->dynamic_ps_enable_work); |
| |
| /* APs need special treatment */ |
| if (sdata->vif.type == NL80211_IFTYPE_AP) { |
| struct ieee80211_sub_if_data *vlan, *tmp; |
| struct beacon_data *old_beacon = sdata->u.ap.beacon; |
| |
| /* remove beacon */ |
| rcu_assign_pointer(sdata->u.ap.beacon, NULL); |
| synchronize_rcu(); |
| kfree(old_beacon); |
| |
| /* down all dependent devices, that is VLANs */ |
| list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans, |
| u.vlan.list) |
| dev_close(vlan->dev); |
| WARN_ON(!list_empty(&sdata->u.ap.vlans)); |
| } |
| |
| local->open_count--; |
| |
| switch (sdata->vif.type) { |
| case NL80211_IFTYPE_AP_VLAN: |
| list_del(&sdata->u.vlan.list); |
| /* no need to tell driver */ |
| break; |
| case NL80211_IFTYPE_MONITOR: |
| if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { |
| local->cooked_mntrs--; |
| break; |
| } |
| |
| local->monitors--; |
| if (local->monitors == 0) { |
| local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; |
| hw_reconf_flags |= IEEE80211_CONF_CHANGE_RADIOTAP; |
| } |
| |
| if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) |
| local->fif_fcsfail--; |
| if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) |
| local->fif_plcpfail--; |
| if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) |
| local->fif_control--; |
| if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) |
| local->fif_other_bss--; |
| |
| spin_lock_bh(&local->filter_lock); |
| ieee80211_configure_filter(local); |
| spin_unlock_bh(&local->filter_lock); |
| break; |
| case NL80211_IFTYPE_STATION: |
| del_timer_sync(&sdata->u.mgd.chswitch_timer); |
| del_timer_sync(&sdata->u.mgd.timer); |
| del_timer_sync(&sdata->u.mgd.conn_mon_timer); |
| del_timer_sync(&sdata->u.mgd.bcn_mon_timer); |
| /* |
| * If any of the timers fired while we waited for it, it will |
| * have queued its work. Now the work will be running again |
| * but will not rearm the timer again because it checks |
| * whether the interface is running, which, at this point, |
| * it no longer is. |
| */ |
| cancel_work_sync(&sdata->u.mgd.work); |
| cancel_work_sync(&sdata->u.mgd.chswitch_work); |
| cancel_work_sync(&sdata->u.mgd.monitor_work); |
| cancel_work_sync(&sdata->u.mgd.beacon_loss_work); |
| |
| /* |
| * When we get here, the interface is marked down. |
| * Call synchronize_rcu() to wait for the RX path |
| * should it be using the interface and enqueuing |
| * frames at this very time on another CPU. |
| */ |
| synchronize_rcu(); |
| skb_queue_purge(&sdata->u.mgd.skb_queue); |
| /* fall through */ |
| case NL80211_IFTYPE_ADHOC: |
| if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
| del_timer_sync(&sdata->u.ibss.timer); |
| cancel_work_sync(&sdata->u.ibss.work); |
| synchronize_rcu(); |
| skb_queue_purge(&sdata->u.ibss.skb_queue); |
| } |
| /* fall through */ |
| case NL80211_IFTYPE_MESH_POINT: |
| if (ieee80211_vif_is_mesh(&sdata->vif)) { |
| /* other_bss and allmulti are always set on mesh |
| * ifaces */ |
| local->fif_other_bss--; |
| atomic_dec(&local->iff_allmultis); |
| |
| spin_lock_bh(&local->filter_lock); |
| ieee80211_configure_filter(local); |
| spin_unlock_bh(&local->filter_lock); |
| |
| ieee80211_stop_mesh(sdata); |
| } |
| /* fall through */ |
| default: |
| if (local->scan_sdata == sdata) { |
| if (!local->ops->hw_scan) |
| cancel_delayed_work_sync(&local->scan_work); |
| /* |
| * The software scan can no longer run now, so we can |
| * clear out the scan_sdata reference. However, the |
| * hardware scan may still be running. The complete |
| * function must be prepared to handle a NULL value. |
| */ |
| local->scan_sdata = NULL; |
| /* |
| * The memory barrier guarantees that another CPU |
| * that is hardware-scanning will now see the fact |
| * that this interface is gone. |
| */ |
| smp_mb(); |
| /* |
| * If software scanning, complete the scan but since |
| * the scan_sdata is NULL already don't send out a |
| * scan event to userspace -- the scan is incomplete. |
| */ |
| if (test_bit(SCAN_SW_SCANNING, &local->scanning)) |
| ieee80211_scan_completed(&local->hw, true); |
| } |
| |
| conf.vif = &sdata->vif; |
| conf.type = sdata->vif.type; |
| conf.mac_addr = dev->dev_addr; |
| /* disable all keys for as long as this netdev is down */ |
| ieee80211_disable_keys(sdata); |
| drv_remove_interface(local, &conf); |
| } |
| |
| sdata->bss = NULL; |
| |
| hw_reconf_flags |= __ieee80211_recalc_idle(local); |
| |
| ieee80211_recalc_ps(local, -1); |
| |
| if (local->open_count == 0) { |
| drv_stop(local); |
| |
| ieee80211_led_radio(local, false); |
| |
| flush_workqueue(local->hw.workqueue); |
| |
| tasklet_disable(&local->tx_pending_tasklet); |
| tasklet_disable(&local->tasklet); |
| |
| /* no reconfiguring after stop! */ |
| hw_reconf_flags = 0; |
| } |
| |
| /* do after stop to avoid reconfiguring when we stop anyway */ |
| if (hw_reconf_flags) |
| ieee80211_hw_config(local, hw_reconf_flags); |
| |
| spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { |
| skb_queue_walk_safe(&local->pending[i], skb, tmp) { |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| if (info->control.vif == &sdata->vif) { |
| __skb_unlink(skb, &local->pending[i]); |
| dev_kfree_skb_irq(skb); |
| } |
| } |
| } |
| spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| |
| return 0; |
| } |
| |
| static void ieee80211_set_multicast_list(struct net_device *dev) |
| { |
| struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| struct ieee80211_local *local = sdata->local; |
| int allmulti, promisc, sdata_allmulti, sdata_promisc; |
| |
| allmulti = !!(dev->flags & IFF_ALLMULTI); |
| promisc = !!(dev->flags & IFF_PROMISC); |
| sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); |
| sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); |
| |
| if (allmulti != sdata_allmulti) { |
| if (dev->flags & IFF_ALLMULTI) |
| atomic_inc(&local->iff_allmultis); |
| else |
| atomic_dec(&local->iff_allmultis); |
| sdata->flags ^= IEEE80211_SDATA_ALLMULTI; |
| } |
| |
| if (promisc != sdata_promisc) { |
| if (dev->flags & IFF_PROMISC) |
| atomic_inc(&local->iff_promiscs); |
| else |
| atomic_dec(&local->iff_promiscs); |
| sdata->flags ^= IEEE80211_SDATA_PROMISC; |
| } |
| spin_lock_bh(&local->filter_lock); |
| __dev_addr_sync(&local->mc_list, &local->mc_count, |
| &dev->mc_list, &dev->mc_count); |
| ieee80211_configure_filter(local); |
| spin_unlock_bh(&local->filter_lock); |
| } |
| |
| /* |
| * Called when the netdev is removed or, by the code below, before |
| * the interface type changes. |
| */ |
| static void ieee80211_teardown_sdata(struct net_device *dev) |
| { |
| struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| struct ieee80211_local *local = sdata->local; |
| struct beacon_data *beacon; |
| struct sk_buff *skb; |
| int flushed; |
| int i; |
| |
| /* free extra data */ |
| ieee80211_free_keys(sdata); |
| |
| ieee80211_debugfs_remove_netdev(sdata); |
| |
| for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
| __skb_queue_purge(&sdata->fragments[i].skb_list); |
| sdata->fragment_next = 0; |
| |
| switch (sdata->vif.type) { |
| case NL80211_IFTYPE_AP: |
| beacon = sdata->u.ap.beacon; |
| rcu_assign_pointer(sdata->u.ap.beacon, NULL); |
| synchronize_rcu(); |
| kfree(beacon); |
| |
| while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { |
| local->total_ps_buffered--; |
| dev_kfree_skb(skb); |
| } |
| |
| break; |
| case NL80211_IFTYPE_MESH_POINT: |
| if (ieee80211_vif_is_mesh(&sdata->vif)) |
| mesh_rmc_free(sdata); |
| break; |
| case NL80211_IFTYPE_ADHOC: |
| if (WARN_ON(sdata->u.ibss.presp)) |
| kfree_skb(sdata->u.ibss.presp); |
| break; |
| case NL80211_IFTYPE_STATION: |
| case NL80211_IFTYPE_WDS: |
| case NL80211_IFTYPE_AP_VLAN: |
| case NL80211_IFTYPE_MONITOR: |
| break; |
| case NL80211_IFTYPE_UNSPECIFIED: |
| case __NL80211_IFTYPE_AFTER_LAST: |
| BUG(); |
| break; |
| } |
| |
| flushed = sta_info_flush(local, sdata); |
| WARN_ON(flushed); |
| } |
| |
| static const struct net_device_ops ieee80211_dataif_ops = { |
| .ndo_open = ieee80211_open, |
| .ndo_stop = ieee80211_stop, |
| .ndo_uninit = ieee80211_teardown_sdata, |
| .ndo_start_xmit = ieee80211_subif_start_xmit, |
| .ndo_set_multicast_list = ieee80211_set_multicast_list, |
| .ndo_change_mtu = ieee80211_change_mtu, |
| .ndo_set_mac_address = eth_mac_addr, |
| }; |
| |
| static const struct net_device_ops ieee80211_monitorif_ops = { |
| .ndo_open = ieee80211_open, |
| .ndo_stop = ieee80211_stop, |
| .ndo_uninit = ieee80211_teardown_sdata, |
| .ndo_start_xmit = ieee80211_monitor_start_xmit, |
| .ndo_set_multicast_list = ieee80211_set_multicast_list, |
| .ndo_change_mtu = ieee80211_change_mtu, |
| .ndo_set_mac_address = eth_mac_addr, |
| }; |
| |
| static void ieee80211_if_setup(struct net_device *dev) |
| { |
| ether_setup(dev); |
| dev->netdev_ops = &ieee80211_dataif_ops; |
| dev->destructor = free_netdev; |
| } |
| |
| /* |
| * Helper function to initialise an interface to a specific type. |
| */ |
| static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, |
| enum nl80211_iftype type) |
| { |
| /* clear type-dependent union */ |
| memset(&sdata->u, 0, sizeof(sdata->u)); |
| |
| /* and set some type-dependent values */ |
| sdata->vif.type = type; |
| sdata->dev->netdev_ops = &ieee80211_dataif_ops; |
| sdata->wdev.iftype = type; |
| |
| /* only monitor differs */ |
| sdata->dev->type = ARPHRD_ETHER; |
| |
| switch (type) { |
| case NL80211_IFTYPE_AP: |
| skb_queue_head_init(&sdata->u.ap.ps_bc_buf); |
| INIT_LIST_HEAD(&sdata->u.ap.vlans); |
| break; |
| case NL80211_IFTYPE_STATION: |
| ieee80211_sta_setup_sdata(sdata); |
| break; |
| case NL80211_IFTYPE_ADHOC: |
| ieee80211_ibss_setup_sdata(sdata); |
| break; |
| case NL80211_IFTYPE_MESH_POINT: |
| if (ieee80211_vif_is_mesh(&sdata->vif)) |
| ieee80211_mesh_init_sdata(sdata); |
| break; |
| case NL80211_IFTYPE_MONITOR: |
| sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
| sdata->dev->netdev_ops = &ieee80211_monitorif_ops; |
| sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | |
| MONITOR_FLAG_OTHER_BSS; |
| break; |
| case NL80211_IFTYPE_WDS: |
| case NL80211_IFTYPE_AP_VLAN: |
| break; |
| case NL80211_IFTYPE_UNSPECIFIED: |
| case __NL80211_IFTYPE_AFTER_LAST: |
| BUG(); |
| break; |
| } |
| |
| ieee80211_debugfs_add_netdev(sdata); |
| } |
| |
| int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
| enum nl80211_iftype type) |
| { |
| ASSERT_RTNL(); |
| |
| if (type == sdata->vif.type) |
| return 0; |
| |
| /* Setting ad-hoc mode on non-IBSS channel is not supported. */ |
| if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && |
| type == NL80211_IFTYPE_ADHOC) |
| return -EOPNOTSUPP; |
| |
| /* |
| * We could, here, on changes between IBSS/STA/MESH modes, |
| * invoke an MLME function instead that disassociates etc. |
| * and goes into the requested mode. |
| */ |
| |
| if (netif_running(sdata->dev)) |
| return -EBUSY; |
| |
| /* Purge and reset type-dependent state. */ |
| ieee80211_teardown_sdata(sdata->dev); |
| ieee80211_setup_sdata(sdata, type); |
| |
| /* reset some values that shouldn't be kept across type changes */ |
| sdata->vif.bss_conf.basic_rates = |
| ieee80211_mandatory_rates(sdata->local, |
| sdata->local->hw.conf.channel->band); |
| sdata->drop_unencrypted = 0; |
| |
| return 0; |
| } |
| |
| int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
| struct net_device **new_dev, enum nl80211_iftype type, |
| struct vif_params *params) |
| { |
| struct net_device *ndev; |
| struct ieee80211_sub_if_data *sdata = NULL; |
| int ret, i; |
| |
| ASSERT_RTNL(); |
| |
| ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size, |
| name, ieee80211_if_setup); |
| if (!ndev) |
| return -ENOMEM; |
| dev_net_set(ndev, wiphy_net(local->hw.wiphy)); |
| |
| ndev->needed_headroom = local->tx_headroom + |
| 4*6 /* four MAC addresses */ |
| + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ |
| + 6 /* mesh */ |
| + 8 /* rfc1042/bridge tunnel */ |
| - ETH_HLEN /* ethernet hard_header_len */ |
| + IEEE80211_ENCRYPT_HEADROOM; |
| ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; |
| |
| ret = dev_alloc_name(ndev, ndev->name); |
| if (ret < 0) |
| goto fail; |
| |
| memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); |
| SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); |
| |
| /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ |
| sdata = netdev_priv(ndev); |
| ndev->ieee80211_ptr = &sdata->wdev; |
| |
| /* initialise type-independent data */ |
| sdata->wdev.wiphy = local->hw.wiphy; |
| sdata->local = local; |
| sdata->dev = ndev; |
| |
| for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
| skb_queue_head_init(&sdata->fragments[i].skb_list); |
| |
| INIT_LIST_HEAD(&sdata->key_list); |
| |
| sdata->force_unicast_rateidx = -1; |
| sdata->max_ratectrl_rateidx = -1; |
| |
| /* setup type-dependent data */ |
| ieee80211_setup_sdata(sdata, type); |
| |
| ret = register_netdevice(ndev); |
| if (ret) |
| goto fail; |
| |
| if (ieee80211_vif_is_mesh(&sdata->vif) && |
| params && params->mesh_id_len) |
| ieee80211_sdata_set_mesh_id(sdata, |
| params->mesh_id_len, |
| params->mesh_id); |
| |
| mutex_lock(&local->iflist_mtx); |
| list_add_tail_rcu(&sdata->list, &local->interfaces); |
| mutex_unlock(&local->iflist_mtx); |
| |
| if (new_dev) |
| *new_dev = ndev; |
| |
| return 0; |
| |
| fail: |
| free_netdev(ndev); |
| return ret; |
| } |
| |
| void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
| { |
| ASSERT_RTNL(); |
| |
| mutex_lock(&sdata->local->iflist_mtx); |
| list_del_rcu(&sdata->list); |
| mutex_unlock(&sdata->local->iflist_mtx); |
| |
| synchronize_rcu(); |
| unregister_netdevice(sdata->dev); |
| } |
| |
| /* |
| * Remove all interfaces, may only be called at hardware unregistration |
| * time because it doesn't do RCU-safe list removals. |
| */ |
| void ieee80211_remove_interfaces(struct ieee80211_local *local) |
| { |
| struct ieee80211_sub_if_data *sdata, *tmp; |
| |
| ASSERT_RTNL(); |
| |
| list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
| /* |
| * we cannot hold the iflist_mtx across unregister_netdevice, |
| * but we only need to hold it for list modifications to lock |
| * out readers since we're under the RTNL here as all other |
| * writers. |
| */ |
| mutex_lock(&local->iflist_mtx); |
| list_del(&sdata->list); |
| mutex_unlock(&local->iflist_mtx); |
| |
| unregister_netdevice(sdata->dev); |
| } |
| } |
| |
| static u32 ieee80211_idle_off(struct ieee80211_local *local, |
| const char *reason) |
| { |
| if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) |
| return 0; |
| |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| printk(KERN_DEBUG "%s: device no longer idle - %s\n", |
| wiphy_name(local->hw.wiphy), reason); |
| #endif |
| |
| local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; |
| return IEEE80211_CONF_CHANGE_IDLE; |
| } |
| |
| static u32 ieee80211_idle_on(struct ieee80211_local *local) |
| { |
| if (local->hw.conf.flags & IEEE80211_CONF_IDLE) |
| return 0; |
| |
| #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| printk(KERN_DEBUG "%s: device now idle\n", |
| wiphy_name(local->hw.wiphy)); |
| #endif |
| |
| local->hw.conf.flags |= IEEE80211_CONF_IDLE; |
| return IEEE80211_CONF_CHANGE_IDLE; |
| } |
| |
| u32 __ieee80211_recalc_idle(struct ieee80211_local *local) |
| { |
| struct ieee80211_sub_if_data *sdata; |
| int count = 0; |
| |
| if (local->scanning) |
| return ieee80211_idle_off(local, "scanning"); |
| |
| list_for_each_entry(sdata, &local->interfaces, list) { |
| if (!netif_running(sdata->dev)) |
| continue; |
| /* do not count disabled managed interfaces */ |
| if (sdata->vif.type == NL80211_IFTYPE_STATION && |
| !sdata->u.mgd.associated && |
| list_empty(&sdata->u.mgd.work_list)) |
| continue; |
| /* do not count unused IBSS interfaces */ |
| if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
| !sdata->u.ibss.ssid_len) |
| continue; |
| /* count everything else */ |
| count++; |
| } |
| |
| if (!count) |
| return ieee80211_idle_on(local); |
| else |
| return ieee80211_idle_off(local, "in use"); |
| |
| return 0; |
| } |
| |
| void ieee80211_recalc_idle(struct ieee80211_local *local) |
| { |
| u32 chg; |
| |
| mutex_lock(&local->iflist_mtx); |
| chg = __ieee80211_recalc_idle(local); |
| mutex_unlock(&local->iflist_mtx); |
| if (chg) |
| ieee80211_hw_config(local, chg); |
| } |