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2133 lines
56 KiB
2133 lines
56 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Interface handling |
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* |
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* Copyright 2002-2005, Instant802 Networks, Inc. |
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* Copyright 2005-2006, Devicescape Software, Inc. |
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* Copyright (c) 2006 Jiri Benc <[email protected]> |
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* Copyright 2008, Johannes Berg <[email protected]> |
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* Copyright 2013-2014 Intel Mobile Communications GmbH |
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* Copyright (c) 2016 Intel Deutschland GmbH |
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* Copyright (C) 2018-2020 Intel Corporation |
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*/ |
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#include <linux/slab.h> |
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#include <linux/kernel.h> |
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#include <linux/if_arp.h> |
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#include <linux/netdevice.h> |
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#include <linux/rtnetlink.h> |
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#include <net/mac80211.h> |
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#include <net/ieee80211_radiotap.h> |
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#include "ieee80211_i.h" |
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#include "sta_info.h" |
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#include "debugfs_netdev.h" |
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#include "mesh.h" |
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#include "led.h" |
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#include "driver-ops.h" |
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#include "wme.h" |
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#include "rate.h" |
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|
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/** |
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* DOC: Interface list locking |
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* |
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* The interface list in each struct ieee80211_local is protected |
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* three-fold: |
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* |
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* (1) modifications may only be done under the RTNL |
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* (2) modifications and readers are protected against each other by |
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* the iflist_mtx. |
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* (3) modifications are done in an RCU manner so atomic readers |
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* can traverse the list in RCU-safe blocks. |
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* |
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* As a consequence, reads (traversals) of the list can be protected |
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* by either the RTNL, the iflist_mtx or RCU. |
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*/ |
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|
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static void ieee80211_iface_work(struct work_struct *work); |
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|
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bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata) |
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{ |
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struct ieee80211_chanctx_conf *chanctx_conf; |
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int power; |
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|
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rcu_read_lock(); |
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chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
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if (!chanctx_conf) { |
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rcu_read_unlock(); |
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return false; |
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} |
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|
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power = ieee80211_chandef_max_power(&chanctx_conf->def); |
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rcu_read_unlock(); |
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|
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if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL) |
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power = min(power, sdata->user_power_level); |
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|
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if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL) |
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power = min(power, sdata->ap_power_level); |
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|
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if (power != sdata->vif.bss_conf.txpower) { |
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sdata->vif.bss_conf.txpower = power; |
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ieee80211_hw_config(sdata->local, 0); |
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return true; |
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} |
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|
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return false; |
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} |
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|
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void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata, |
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bool update_bss) |
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{ |
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if (__ieee80211_recalc_txpower(sdata) || |
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(update_bss && ieee80211_sdata_running(sdata))) |
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ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER); |
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} |
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|
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static u32 __ieee80211_idle_off(struct ieee80211_local *local) |
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{ |
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if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) |
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return 0; |
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|
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local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; |
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return IEEE80211_CONF_CHANGE_IDLE; |
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} |
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|
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static u32 __ieee80211_idle_on(struct ieee80211_local *local) |
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{ |
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if (local->hw.conf.flags & IEEE80211_CONF_IDLE) |
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return 0; |
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|
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ieee80211_flush_queues(local, NULL, false); |
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|
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local->hw.conf.flags |= IEEE80211_CONF_IDLE; |
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return IEEE80211_CONF_CHANGE_IDLE; |
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} |
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|
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static u32 __ieee80211_recalc_idle(struct ieee80211_local *local, |
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bool force_active) |
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{ |
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bool working, scanning, active; |
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unsigned int led_trig_start = 0, led_trig_stop = 0; |
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|
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lockdep_assert_held(&local->mtx); |
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|
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active = force_active || |
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!list_empty(&local->chanctx_list) || |
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local->monitors; |
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|
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working = !local->ops->remain_on_channel && |
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!list_empty(&local->roc_list); |
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|
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scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || |
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test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); |
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|
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if (working || scanning) |
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led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; |
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else |
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led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; |
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|
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if (active) |
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led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; |
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else |
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led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; |
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|
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ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); |
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|
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if (working || scanning || active) |
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return __ieee80211_idle_off(local); |
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return __ieee80211_idle_on(local); |
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} |
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|
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u32 ieee80211_idle_off(struct ieee80211_local *local) |
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{ |
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return __ieee80211_recalc_idle(local, true); |
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} |
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|
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void ieee80211_recalc_idle(struct ieee80211_local *local) |
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{ |
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u32 change = __ieee80211_recalc_idle(local, false); |
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if (change) |
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ieee80211_hw_config(local, change); |
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} |
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|
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static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr, |
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bool check_dup) |
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{ |
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struct ieee80211_local *local = sdata->local; |
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struct ieee80211_sub_if_data *iter; |
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u64 new, mask, tmp; |
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u8 *m; |
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int ret = 0; |
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|
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if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) |
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return 0; |
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|
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m = addr; |
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new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
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((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | |
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((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); |
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|
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m = local->hw.wiphy->addr_mask; |
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mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
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((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | |
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((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); |
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|
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if (!check_dup) |
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return ret; |
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|
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mutex_lock(&local->iflist_mtx); |
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list_for_each_entry(iter, &local->interfaces, list) { |
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if (iter == sdata) |
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continue; |
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|
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if (iter->vif.type == NL80211_IFTYPE_MONITOR && |
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!(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE)) |
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continue; |
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|
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m = iter->vif.addr; |
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tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
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((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | |
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((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); |
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|
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if ((new & ~mask) != (tmp & ~mask)) { |
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ret = -EINVAL; |
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break; |
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} |
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} |
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mutex_unlock(&local->iflist_mtx); |
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|
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return ret; |
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} |
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|
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static int ieee80211_change_mac(struct net_device *dev, void *addr) |
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{ |
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struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
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struct sockaddr *sa = addr; |
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bool check_dup = true; |
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int ret; |
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|
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if (ieee80211_sdata_running(sdata)) |
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return -EBUSY; |
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|
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if (sdata->vif.type == NL80211_IFTYPE_MONITOR && |
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!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) |
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check_dup = false; |
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|
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ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup); |
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if (ret) |
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return ret; |
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|
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ret = eth_mac_addr(dev, sa); |
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|
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if (ret == 0) |
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memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); |
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|
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return ret; |
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} |
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|
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static inline int identical_mac_addr_allowed(int type1, int type2) |
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{ |
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return type1 == NL80211_IFTYPE_MONITOR || |
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type2 == NL80211_IFTYPE_MONITOR || |
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type1 == NL80211_IFTYPE_P2P_DEVICE || |
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type2 == NL80211_IFTYPE_P2P_DEVICE || |
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(type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || |
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(type1 == NL80211_IFTYPE_AP_VLAN && |
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(type2 == NL80211_IFTYPE_AP || |
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type2 == NL80211_IFTYPE_AP_VLAN)); |
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} |
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|
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static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, |
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enum nl80211_iftype iftype) |
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{ |
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struct ieee80211_local *local = sdata->local; |
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struct ieee80211_sub_if_data *nsdata; |
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int ret; |
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|
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ASSERT_RTNL(); |
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|
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/* we hold the RTNL here so can safely walk the list */ |
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list_for_each_entry(nsdata, &local->interfaces, list) { |
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if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { |
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/* |
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* Only OCB and monitor mode may coexist |
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*/ |
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if ((sdata->vif.type == NL80211_IFTYPE_OCB && |
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nsdata->vif.type != NL80211_IFTYPE_MONITOR) || |
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(sdata->vif.type != NL80211_IFTYPE_MONITOR && |
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nsdata->vif.type == NL80211_IFTYPE_OCB)) |
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return -EBUSY; |
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|
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/* |
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* Allow only a single IBSS interface to be up at any |
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* time. This is restricted because beacon distribution |
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* cannot work properly if both are in the same IBSS. |
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* |
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* To remove this restriction we'd have to disallow them |
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* from setting the same SSID on different IBSS interfaces |
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* belonging to the same hardware. Then, however, we're |
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* faced with having to adopt two different TSF timers... |
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*/ |
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if (iftype == NL80211_IFTYPE_ADHOC && |
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nsdata->vif.type == NL80211_IFTYPE_ADHOC) |
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return -EBUSY; |
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/* |
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* will not add another interface while any channel |
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* switch is active. |
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*/ |
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if (nsdata->vif.csa_active) |
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return -EBUSY; |
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|
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/* |
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* The remaining checks are only performed for interfaces |
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* with the same MAC address. |
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*/ |
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if (!ether_addr_equal(sdata->vif.addr, |
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nsdata->vif.addr)) |
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continue; |
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|
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/* |
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* check whether it may have the same address |
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*/ |
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if (!identical_mac_addr_allowed(iftype, |
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nsdata->vif.type)) |
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return -ENOTUNIQ; |
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|
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/* |
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* can only add VLANs to enabled APs |
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*/ |
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if (iftype == NL80211_IFTYPE_AP_VLAN && |
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nsdata->vif.type == NL80211_IFTYPE_AP) |
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sdata->bss = &nsdata->u.ap; |
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} |
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} |
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|
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mutex_lock(&local->chanctx_mtx); |
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ret = ieee80211_check_combinations(sdata, NULL, 0, 0); |
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mutex_unlock(&local->chanctx_mtx); |
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return ret; |
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} |
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|
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static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata, |
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enum nl80211_iftype iftype) |
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{ |
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int n_queues = sdata->local->hw.queues; |
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int i; |
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|
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if (iftype == NL80211_IFTYPE_NAN) |
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return 0; |
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|
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if (iftype != NL80211_IFTYPE_P2P_DEVICE) { |
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for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
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if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == |
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IEEE80211_INVAL_HW_QUEUE)) |
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return -EINVAL; |
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if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= |
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n_queues)) |
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return -EINVAL; |
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} |
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} |
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|
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if ((iftype != NL80211_IFTYPE_AP && |
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iftype != NL80211_IFTYPE_P2P_GO && |
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iftype != NL80211_IFTYPE_MESH_POINT) || |
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!ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) { |
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sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; |
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return 0; |
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} |
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|
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if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) |
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return -EINVAL; |
|
|
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if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) |
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return -EINVAL; |
|
|
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return 0; |
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} |
|
|
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static int ieee80211_open(struct net_device *dev) |
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{ |
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struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
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int err; |
|
|
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/* fail early if user set an invalid address */ |
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if (!is_valid_ether_addr(dev->dev_addr)) |
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return -EADDRNOTAVAIL; |
|
|
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err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); |
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if (err) |
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return err; |
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|
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wiphy_lock(sdata->local->hw.wiphy); |
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err = ieee80211_do_open(&sdata->wdev, true); |
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wiphy_unlock(sdata->local->hw.wiphy); |
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|
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return err; |
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} |
|
|
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static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down) |
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{ |
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struct ieee80211_local *local = sdata->local; |
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unsigned long flags; |
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struct sk_buff *skb, *tmp; |
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u32 hw_reconf_flags = 0; |
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int i, flushed; |
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struct ps_data *ps; |
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struct cfg80211_chan_def chandef; |
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bool cancel_scan; |
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struct cfg80211_nan_func *func; |
|
|
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clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
|
|
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cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; |
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if (cancel_scan) |
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ieee80211_scan_cancel(local); |
|
|
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/* |
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* Stop TX on this interface first. |
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*/ |
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if (sdata->dev) |
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netif_tx_stop_all_queues(sdata->dev); |
|
|
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ieee80211_roc_purge(local, sdata); |
|
|
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switch (sdata->vif.type) { |
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case NL80211_IFTYPE_STATION: |
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ieee80211_mgd_stop(sdata); |
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break; |
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case NL80211_IFTYPE_ADHOC: |
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ieee80211_ibss_stop(sdata); |
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break; |
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case NL80211_IFTYPE_MONITOR: |
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if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) |
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break; |
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list_del_rcu(&sdata->u.mntr.list); |
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break; |
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default: |
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break; |
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} |
|
|
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/* |
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* Remove all stations associated with this interface. |
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* |
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* This must be done before calling ops->remove_interface() |
|
* because otherwise we can later invoke ops->sta_notify() |
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* whenever the STAs are removed, and that invalidates driver |
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* assumptions about always getting a vif pointer that is valid |
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* (because if we remove a STA after ops->remove_interface() |
|
* the driver will have removed the vif info already!) |
|
* |
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* For AP_VLANs stations may exist since there's nothing else that |
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* would have removed them, but in other modes there shouldn't |
|
* be any stations. |
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*/ |
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flushed = sta_info_flush(sdata); |
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WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0); |
|
|
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/* don't count this interface for allmulti while it is down */ |
|
if (sdata->flags & IEEE80211_SDATA_ALLMULTI) |
|
atomic_dec(&local->iff_allmultis); |
|
|
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if (sdata->vif.type == NL80211_IFTYPE_AP) { |
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local->fif_pspoll--; |
|
local->fif_probe_req--; |
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} else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
|
local->fif_probe_req--; |
|
} |
|
|
|
if (sdata->dev) { |
|
netif_addr_lock_bh(sdata->dev); |
|
spin_lock_bh(&local->filter_lock); |
|
__hw_addr_unsync(&local->mc_list, &sdata->dev->mc, |
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sdata->dev->addr_len); |
|
spin_unlock_bh(&local->filter_lock); |
|
netif_addr_unlock_bh(sdata->dev); |
|
} |
|
|
|
del_timer_sync(&local->dynamic_ps_timer); |
|
cancel_work_sync(&local->dynamic_ps_enable_work); |
|
|
|
cancel_work_sync(&sdata->recalc_smps); |
|
sdata_lock(sdata); |
|
mutex_lock(&local->mtx); |
|
sdata->vif.csa_active = false; |
|
if (sdata->vif.type == NL80211_IFTYPE_STATION) |
|
sdata->u.mgd.csa_waiting_bcn = false; |
|
if (sdata->csa_block_tx) { |
|
ieee80211_wake_vif_queues(local, sdata, |
|
IEEE80211_QUEUE_STOP_REASON_CSA); |
|
sdata->csa_block_tx = false; |
|
} |
|
mutex_unlock(&local->mtx); |
|
sdata_unlock(sdata); |
|
|
|
cancel_work_sync(&sdata->csa_finalize_work); |
|
|
|
cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); |
|
|
|
if (sdata->wdev.cac_started) { |
|
chandef = sdata->vif.bss_conf.chandef; |
|
WARN_ON(local->suspended); |
|
mutex_lock(&local->mtx); |
|
ieee80211_vif_release_channel(sdata); |
|
mutex_unlock(&local->mtx); |
|
cfg80211_cac_event(sdata->dev, &chandef, |
|
NL80211_RADAR_CAC_ABORTED, |
|
GFP_KERNEL); |
|
} |
|
|
|
/* APs need special treatment */ |
|
if (sdata->vif.type == NL80211_IFTYPE_AP) { |
|
struct ieee80211_sub_if_data *vlan, *tmpsdata; |
|
|
|
/* down all dependent devices, that is VLANs */ |
|
list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, |
|
u.vlan.list) |
|
dev_close(vlan->dev); |
|
WARN_ON(!list_empty(&sdata->u.ap.vlans)); |
|
} else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
|
/* remove all packets in parent bc_buf pointing to this dev */ |
|
ps = &sdata->bss->ps; |
|
|
|
spin_lock_irqsave(&ps->bc_buf.lock, flags); |
|
skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { |
|
if (skb->dev == sdata->dev) { |
|
__skb_unlink(skb, &ps->bc_buf); |
|
local->total_ps_buffered--; |
|
ieee80211_free_txskb(&local->hw, skb); |
|
} |
|
} |
|
spin_unlock_irqrestore(&ps->bc_buf.lock, flags); |
|
} |
|
|
|
if (going_down) |
|
local->open_count--; |
|
|
|
switch (sdata->vif.type) { |
|
case NL80211_IFTYPE_AP_VLAN: |
|
mutex_lock(&local->mtx); |
|
list_del(&sdata->u.vlan.list); |
|
mutex_unlock(&local->mtx); |
|
RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); |
|
/* see comment in the default case below */ |
|
ieee80211_free_keys(sdata, true); |
|
/* 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_MONITOR; |
|
hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; |
|
} |
|
|
|
ieee80211_adjust_monitor_flags(sdata, -1); |
|
break; |
|
case NL80211_IFTYPE_NAN: |
|
/* clean all the functions */ |
|
spin_lock_bh(&sdata->u.nan.func_lock); |
|
|
|
idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) { |
|
idr_remove(&sdata->u.nan.function_inst_ids, i); |
|
cfg80211_free_nan_func(func); |
|
} |
|
idr_destroy(&sdata->u.nan.function_inst_ids); |
|
|
|
spin_unlock_bh(&sdata->u.nan.func_lock); |
|
break; |
|
case NL80211_IFTYPE_P2P_DEVICE: |
|
/* relies on synchronize_rcu() below */ |
|
RCU_INIT_POINTER(local->p2p_sdata, NULL); |
|
fallthrough; |
|
default: |
|
cancel_work_sync(&sdata->work); |
|
/* |
|
* When we get here, the interface is marked down. |
|
* Free the remaining keys, if there are any |
|
* (which can happen in AP mode if userspace sets |
|
* keys before the interface is operating) |
|
* |
|
* Force the key freeing to always synchronize_net() |
|
* to wait for the RX path in case it is using this |
|
* interface enqueuing frames at this very time on |
|
* another CPU. |
|
*/ |
|
ieee80211_free_keys(sdata, true); |
|
skb_queue_purge(&sdata->skb_queue); |
|
} |
|
|
|
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]); |
|
ieee80211_free_txskb(&local->hw, skb); |
|
} |
|
} |
|
} |
|
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
|
ieee80211_txq_remove_vlan(local, sdata); |
|
|
|
sdata->bss = NULL; |
|
|
|
if (local->open_count == 0) |
|
ieee80211_clear_tx_pending(local); |
|
|
|
sdata->vif.bss_conf.beacon_int = 0; |
|
|
|
/* |
|
* If the interface goes down while suspended, presumably because |
|
* the device was unplugged and that happens before our resume, |
|
* then the driver is already unconfigured and the remainder of |
|
* this function isn't needed. |
|
* XXX: what about WoWLAN? If the device has software state, e.g. |
|
* memory allocated, it might expect teardown commands from |
|
* mac80211 here? |
|
*/ |
|
if (local->suspended) { |
|
WARN_ON(local->wowlan); |
|
WARN_ON(rtnl_dereference(local->monitor_sdata)); |
|
return; |
|
} |
|
|
|
switch (sdata->vif.type) { |
|
case NL80211_IFTYPE_AP_VLAN: |
|
break; |
|
case NL80211_IFTYPE_MONITOR: |
|
if (local->monitors == 0) |
|
ieee80211_del_virtual_monitor(local); |
|
|
|
mutex_lock(&local->mtx); |
|
ieee80211_recalc_idle(local); |
|
mutex_unlock(&local->mtx); |
|
|
|
if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) |
|
break; |
|
|
|
fallthrough; |
|
default: |
|
if (going_down) |
|
drv_remove_interface(local, sdata); |
|
} |
|
|
|
ieee80211_recalc_ps(local); |
|
|
|
if (cancel_scan) |
|
flush_delayed_work(&local->scan_work); |
|
|
|
if (local->open_count == 0) { |
|
ieee80211_stop_device(local); |
|
|
|
/* no reconfiguring after stop! */ |
|
return; |
|
} |
|
|
|
/* do after stop to avoid reconfiguring when we stop anyway */ |
|
ieee80211_configure_filter(local); |
|
ieee80211_hw_config(local, hw_reconf_flags); |
|
|
|
if (local->monitors == local->open_count) |
|
ieee80211_add_virtual_monitor(local); |
|
} |
|
|
|
static int ieee80211_stop(struct net_device *dev) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
|
|
|
wiphy_lock(sdata->local->hw.wiphy); |
|
ieee80211_do_stop(sdata, true); |
|
wiphy_unlock(sdata->local->hw.wiphy); |
|
|
|
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, sdata_allmulti; |
|
|
|
allmulti = !!(dev->flags & IFF_ALLMULTI); |
|
sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); |
|
|
|
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; |
|
} |
|
|
|
spin_lock_bh(&local->filter_lock); |
|
__hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); |
|
spin_unlock_bh(&local->filter_lock); |
|
ieee80211_queue_work(&local->hw, &local->reconfig_filter); |
|
} |
|
|
|
/* |
|
* Called when the netdev is removed or, by the code below, before |
|
* the interface type changes. |
|
*/ |
|
static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
int i; |
|
|
|
/* free extra data */ |
|
ieee80211_free_keys(sdata, false); |
|
|
|
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; |
|
|
|
if (ieee80211_vif_is_mesh(&sdata->vif)) |
|
ieee80211_mesh_teardown_sdata(sdata); |
|
} |
|
|
|
static void ieee80211_uninit(struct net_device *dev) |
|
{ |
|
ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); |
|
} |
|
|
|
static u16 ieee80211_netdev_select_queue(struct net_device *dev, |
|
struct sk_buff *skb, |
|
struct net_device *sb_dev) |
|
{ |
|
return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); |
|
} |
|
|
|
static void |
|
ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) |
|
{ |
|
dev_fetch_sw_netstats(stats, dev->tstats); |
|
} |
|
|
|
static const struct net_device_ops ieee80211_dataif_ops = { |
|
.ndo_open = ieee80211_open, |
|
.ndo_stop = ieee80211_stop, |
|
.ndo_uninit = ieee80211_uninit, |
|
.ndo_start_xmit = ieee80211_subif_start_xmit, |
|
.ndo_set_rx_mode = ieee80211_set_multicast_list, |
|
.ndo_set_mac_address = ieee80211_change_mac, |
|
.ndo_select_queue = ieee80211_netdev_select_queue, |
|
.ndo_get_stats64 = ieee80211_get_stats64, |
|
}; |
|
|
|
static u16 ieee80211_monitor_select_queue(struct net_device *dev, |
|
struct sk_buff *skb, |
|
struct net_device *sb_dev) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
|
struct ieee80211_hdr *hdr; |
|
int len_rthdr; |
|
|
|
if (local->hw.queues < IEEE80211_NUM_ACS) |
|
return 0; |
|
|
|
/* reset flags and info before parsing radiotap header */ |
|
memset(info, 0, sizeof(*info)); |
|
|
|
if (!ieee80211_parse_tx_radiotap(skb, dev)) |
|
return 0; /* doesn't matter, frame will be dropped */ |
|
|
|
len_rthdr = ieee80211_get_radiotap_len(skb->data); |
|
hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); |
|
if (skb->len < len_rthdr + 2 || |
|
skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control)) |
|
return 0; /* doesn't matter, frame will be dropped */ |
|
|
|
return ieee80211_select_queue_80211(sdata, skb, hdr); |
|
} |
|
|
|
static const struct net_device_ops ieee80211_monitorif_ops = { |
|
.ndo_open = ieee80211_open, |
|
.ndo_stop = ieee80211_stop, |
|
.ndo_uninit = ieee80211_uninit, |
|
.ndo_start_xmit = ieee80211_monitor_start_xmit, |
|
.ndo_set_rx_mode = ieee80211_set_multicast_list, |
|
.ndo_set_mac_address = ieee80211_change_mac, |
|
.ndo_select_queue = ieee80211_monitor_select_queue, |
|
.ndo_get_stats64 = ieee80211_get_stats64, |
|
}; |
|
|
|
static const struct net_device_ops ieee80211_dataif_8023_ops = { |
|
.ndo_open = ieee80211_open, |
|
.ndo_stop = ieee80211_stop, |
|
.ndo_uninit = ieee80211_uninit, |
|
.ndo_start_xmit = ieee80211_subif_start_xmit_8023, |
|
.ndo_set_rx_mode = ieee80211_set_multicast_list, |
|
.ndo_set_mac_address = ieee80211_change_mac, |
|
.ndo_select_queue = ieee80211_netdev_select_queue, |
|
.ndo_get_stats64 = ieee80211_get_stats64, |
|
}; |
|
|
|
static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype) |
|
{ |
|
switch (iftype) { |
|
/* P2P GO and client are mapped to AP/STATION types */ |
|
case NL80211_IFTYPE_AP: |
|
case NL80211_IFTYPE_STATION: |
|
return true; |
|
default: |
|
return false; |
|
} |
|
} |
|
|
|
static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
u32 flags; |
|
|
|
flags = sdata->vif.offload_flags; |
|
|
|
if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) && |
|
ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { |
|
flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED; |
|
|
|
if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) && |
|
local->hw.wiphy->frag_threshold != (u32)-1) |
|
flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; |
|
|
|
if (local->monitors) |
|
flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; |
|
} else { |
|
flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; |
|
} |
|
|
|
if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) && |
|
ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { |
|
flags |= IEEE80211_OFFLOAD_DECAP_ENABLED; |
|
|
|
if (local->monitors) |
|
flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; |
|
} else { |
|
flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; |
|
} |
|
|
|
if (sdata->vif.offload_flags == flags) |
|
return false; |
|
|
|
sdata->vif.offload_flags = flags; |
|
ieee80211_check_fast_rx_iface(sdata); |
|
return true; |
|
} |
|
|
|
static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_sub_if_data *bss = sdata; |
|
bool enabled; |
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
|
if (!sdata->bss) |
|
return; |
|
|
|
bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); |
|
} |
|
|
|
if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) || |
|
!ieee80211_iftype_supports_hdr_offload(bss->vif.type)) |
|
return; |
|
|
|
enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED; |
|
if (sdata->wdev.use_4addr && |
|
!(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR)) |
|
enabled = false; |
|
|
|
sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops : |
|
&ieee80211_dataif_ops; |
|
} |
|
|
|
static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_sub_if_data *vsdata; |
|
|
|
if (ieee80211_set_sdata_offload_flags(sdata)) { |
|
drv_update_vif_offload(local, sdata); |
|
ieee80211_set_vif_encap_ops(sdata); |
|
} |
|
|
|
list_for_each_entry(vsdata, &local->interfaces, list) { |
|
if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN || |
|
vsdata->bss != &sdata->u.ap) |
|
continue; |
|
|
|
ieee80211_set_vif_encap_ops(vsdata); |
|
} |
|
} |
|
|
|
void ieee80211_recalc_offload(struct ieee80211_local *local) |
|
{ |
|
struct ieee80211_sub_if_data *sdata; |
|
|
|
if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD)) |
|
return; |
|
|
|
mutex_lock(&local->iflist_mtx); |
|
|
|
list_for_each_entry(sdata, &local->interfaces, list) { |
|
if (!ieee80211_sdata_running(sdata)) |
|
continue; |
|
|
|
ieee80211_recalc_sdata_offload(sdata); |
|
} |
|
|
|
mutex_unlock(&local->iflist_mtx); |
|
} |
|
|
|
void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, |
|
const int offset) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
u32 flags = sdata->u.mntr.flags; |
|
|
|
#define ADJUST(_f, _s) do { \ |
|
if (flags & MONITOR_FLAG_##_f) \ |
|
local->fif_##_s += offset; \ |
|
} while (0) |
|
|
|
ADJUST(FCSFAIL, fcsfail); |
|
ADJUST(PLCPFAIL, plcpfail); |
|
ADJUST(CONTROL, control); |
|
ADJUST(CONTROL, pspoll); |
|
ADJUST(OTHER_BSS, other_bss); |
|
|
|
#undef ADJUST |
|
} |
|
|
|
static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
int i; |
|
|
|
for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
|
if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) |
|
sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; |
|
else if (local->hw.queues >= IEEE80211_NUM_ACS) |
|
sdata->vif.hw_queue[i] = i; |
|
else |
|
sdata->vif.hw_queue[i] = 0; |
|
} |
|
sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; |
|
} |
|
|
|
int ieee80211_add_virtual_monitor(struct ieee80211_local *local) |
|
{ |
|
struct ieee80211_sub_if_data *sdata; |
|
int ret; |
|
|
|
if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) |
|
return 0; |
|
|
|
ASSERT_RTNL(); |
|
|
|
if (local->monitor_sdata) |
|
return 0; |
|
|
|
sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); |
|
if (!sdata) |
|
return -ENOMEM; |
|
|
|
/* set up data */ |
|
sdata->local = local; |
|
sdata->vif.type = NL80211_IFTYPE_MONITOR; |
|
snprintf(sdata->name, IFNAMSIZ, "%s-monitor", |
|
wiphy_name(local->hw.wiphy)); |
|
sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; |
|
|
|
sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; |
|
|
|
ieee80211_set_default_queues(sdata); |
|
|
|
ret = drv_add_interface(local, sdata); |
|
if (WARN_ON(ret)) { |
|
/* ok .. stupid driver, it asked for this! */ |
|
kfree(sdata); |
|
return ret; |
|
} |
|
|
|
set_bit(SDATA_STATE_RUNNING, &sdata->state); |
|
|
|
ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); |
|
if (ret) { |
|
kfree(sdata); |
|
return ret; |
|
} |
|
|
|
mutex_lock(&local->iflist_mtx); |
|
rcu_assign_pointer(local->monitor_sdata, sdata); |
|
mutex_unlock(&local->iflist_mtx); |
|
|
|
mutex_lock(&local->mtx); |
|
ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, |
|
IEEE80211_CHANCTX_EXCLUSIVE); |
|
mutex_unlock(&local->mtx); |
|
if (ret) { |
|
mutex_lock(&local->iflist_mtx); |
|
RCU_INIT_POINTER(local->monitor_sdata, NULL); |
|
mutex_unlock(&local->iflist_mtx); |
|
synchronize_net(); |
|
drv_remove_interface(local, sdata); |
|
kfree(sdata); |
|
return ret; |
|
} |
|
|
|
skb_queue_head_init(&sdata->skb_queue); |
|
INIT_WORK(&sdata->work, ieee80211_iface_work); |
|
|
|
return 0; |
|
} |
|
|
|
void ieee80211_del_virtual_monitor(struct ieee80211_local *local) |
|
{ |
|
struct ieee80211_sub_if_data *sdata; |
|
|
|
if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) |
|
return; |
|
|
|
ASSERT_RTNL(); |
|
|
|
mutex_lock(&local->iflist_mtx); |
|
|
|
sdata = rcu_dereference_protected(local->monitor_sdata, |
|
lockdep_is_held(&local->iflist_mtx)); |
|
if (!sdata) { |
|
mutex_unlock(&local->iflist_mtx); |
|
return; |
|
} |
|
|
|
RCU_INIT_POINTER(local->monitor_sdata, NULL); |
|
mutex_unlock(&local->iflist_mtx); |
|
|
|
synchronize_net(); |
|
|
|
mutex_lock(&local->mtx); |
|
ieee80211_vif_release_channel(sdata); |
|
mutex_unlock(&local->mtx); |
|
|
|
drv_remove_interface(local, sdata); |
|
|
|
kfree(sdata); |
|
} |
|
|
|
/* |
|
* NOTE: Be very careful when changing this function, it must NOT return |
|
* an error on interface type changes that have been pre-checked, so most |
|
* checks should be in ieee80211_check_concurrent_iface. |
|
*/ |
|
int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); |
|
struct net_device *dev = wdev->netdev; |
|
struct ieee80211_local *local = sdata->local; |
|
u32 changed = 0; |
|
int res; |
|
u32 hw_reconf_flags = 0; |
|
|
|
switch (sdata->vif.type) { |
|
case NL80211_IFTYPE_AP_VLAN: { |
|
struct ieee80211_sub_if_data *master; |
|
|
|
if (!sdata->bss) |
|
return -ENOLINK; |
|
|
|
mutex_lock(&local->mtx); |
|
list_add(&sdata->u.vlan.list, &sdata->bss->vlans); |
|
mutex_unlock(&local->mtx); |
|
|
|
master = container_of(sdata->bss, |
|
struct ieee80211_sub_if_data, u.ap); |
|
sdata->control_port_protocol = |
|
master->control_port_protocol; |
|
sdata->control_port_no_encrypt = |
|
master->control_port_no_encrypt; |
|
sdata->control_port_over_nl80211 = |
|
master->control_port_over_nl80211; |
|
sdata->control_port_no_preauth = |
|
master->control_port_no_preauth; |
|
sdata->vif.cab_queue = master->vif.cab_queue; |
|
memcpy(sdata->vif.hw_queue, master->vif.hw_queue, |
|
sizeof(sdata->vif.hw_queue)); |
|
sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef; |
|
|
|
mutex_lock(&local->key_mtx); |
|
sdata->crypto_tx_tailroom_needed_cnt += |
|
master->crypto_tx_tailroom_needed_cnt; |
|
mutex_unlock(&local->key_mtx); |
|
|
|
break; |
|
} |
|
case NL80211_IFTYPE_AP: |
|
sdata->bss = &sdata->u.ap; |
|
break; |
|
case NL80211_IFTYPE_MESH_POINT: |
|
case NL80211_IFTYPE_STATION: |
|
case NL80211_IFTYPE_MONITOR: |
|
case NL80211_IFTYPE_ADHOC: |
|
case NL80211_IFTYPE_P2P_DEVICE: |
|
case NL80211_IFTYPE_OCB: |
|
case NL80211_IFTYPE_NAN: |
|
/* no special treatment */ |
|
break; |
|
case NL80211_IFTYPE_UNSPECIFIED: |
|
case NUM_NL80211_IFTYPES: |
|
case NL80211_IFTYPE_P2P_CLIENT: |
|
case NL80211_IFTYPE_P2P_GO: |
|
case NL80211_IFTYPE_WDS: |
|
/* 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); |
|
ieee80211_mod_tpt_led_trig(local, |
|
IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); |
|
} |
|
|
|
/* |
|
* Copy the hopefully now-present MAC address to |
|
* this interface, if it has the special null one. |
|
*/ |
|
if (dev && is_zero_ether_addr(dev->dev_addr)) { |
|
memcpy(dev->dev_addr, |
|
local->hw.wiphy->perm_addr, |
|
ETH_ALEN); |
|
memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); |
|
|
|
if (!is_valid_ether_addr(dev->dev_addr)) { |
|
res = -EADDRNOTAVAIL; |
|
goto err_stop; |
|
} |
|
} |
|
|
|
switch (sdata->vif.type) { |
|
case NL80211_IFTYPE_AP_VLAN: |
|
/* no need to tell driver, but set carrier and chanctx */ |
|
if (rtnl_dereference(sdata->bss->beacon)) { |
|
ieee80211_vif_vlan_copy_chanctx(sdata); |
|
netif_carrier_on(dev); |
|
ieee80211_set_vif_encap_ops(sdata); |
|
} else { |
|
netif_carrier_off(dev); |
|
} |
|
break; |
|
case NL80211_IFTYPE_MONITOR: |
|
if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { |
|
local->cooked_mntrs++; |
|
break; |
|
} |
|
|
|
if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { |
|
res = drv_add_interface(local, sdata); |
|
if (res) |
|
goto err_stop; |
|
} else if (local->monitors == 0 && local->open_count == 0) { |
|
res = ieee80211_add_virtual_monitor(local); |
|
if (res) |
|
goto err_stop; |
|
} |
|
|
|
/* must be before the call to ieee80211_configure_filter */ |
|
local->monitors++; |
|
if (local->monitors == 1) { |
|
local->hw.conf.flags |= IEEE80211_CONF_MONITOR; |
|
hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; |
|
} |
|
|
|
ieee80211_adjust_monitor_flags(sdata, 1); |
|
ieee80211_configure_filter(local); |
|
ieee80211_recalc_offload(local); |
|
mutex_lock(&local->mtx); |
|
ieee80211_recalc_idle(local); |
|
mutex_unlock(&local->mtx); |
|
|
|
netif_carrier_on(dev); |
|
break; |
|
default: |
|
if (coming_up) { |
|
ieee80211_del_virtual_monitor(local); |
|
ieee80211_set_sdata_offload_flags(sdata); |
|
|
|
res = drv_add_interface(local, sdata); |
|
if (res) |
|
goto err_stop; |
|
|
|
ieee80211_set_vif_encap_ops(sdata); |
|
res = ieee80211_check_queues(sdata, |
|
ieee80211_vif_type_p2p(&sdata->vif)); |
|
if (res) |
|
goto err_del_interface; |
|
} |
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP) { |
|
local->fif_pspoll++; |
|
local->fif_probe_req++; |
|
|
|
ieee80211_configure_filter(local); |
|
} else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
|
local->fif_probe_req++; |
|
} |
|
|
|
if (sdata->vif.probe_req_reg) |
|
drv_config_iface_filter(local, sdata, |
|
FIF_PROBE_REQ, |
|
FIF_PROBE_REQ); |
|
|
|
if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && |
|
sdata->vif.type != NL80211_IFTYPE_NAN) |
|
changed |= ieee80211_reset_erp_info(sdata); |
|
ieee80211_bss_info_change_notify(sdata, changed); |
|
|
|
switch (sdata->vif.type) { |
|
case NL80211_IFTYPE_STATION: |
|
case NL80211_IFTYPE_ADHOC: |
|
case NL80211_IFTYPE_AP: |
|
case NL80211_IFTYPE_MESH_POINT: |
|
case NL80211_IFTYPE_OCB: |
|
netif_carrier_off(dev); |
|
break; |
|
case NL80211_IFTYPE_P2P_DEVICE: |
|
case NL80211_IFTYPE_NAN: |
|
break; |
|
default: |
|
/* not reached */ |
|
WARN_ON(1); |
|
} |
|
|
|
/* |
|
* Set default queue parameters so drivers don't |
|
* need to initialise the hardware if the hardware |
|
* doesn't start up with sane defaults. |
|
* Enable QoS for anything but station interfaces. |
|
*/ |
|
ieee80211_set_wmm_default(sdata, true, |
|
sdata->vif.type != NL80211_IFTYPE_STATION); |
|
} |
|
|
|
set_bit(SDATA_STATE_RUNNING, &sdata->state); |
|
|
|
switch (sdata->vif.type) { |
|
case NL80211_IFTYPE_P2P_DEVICE: |
|
rcu_assign_pointer(local->p2p_sdata, sdata); |
|
break; |
|
case NL80211_IFTYPE_MONITOR: |
|
if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) |
|
break; |
|
list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
/* |
|
* 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 (coming_up) |
|
local->open_count++; |
|
|
|
if (hw_reconf_flags) |
|
ieee80211_hw_config(local, hw_reconf_flags); |
|
|
|
ieee80211_recalc_ps(local); |
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
|
sdata->vif.type == NL80211_IFTYPE_AP_VLAN || |
|
local->ops->wake_tx_queue) { |
|
/* XXX: for AP_VLAN, actually track AP queues */ |
|
if (dev) |
|
netif_tx_start_all_queues(dev); |
|
} else if (dev) { |
|
unsigned long flags; |
|
int n_acs = IEEE80211_NUM_ACS; |
|
int ac; |
|
|
|
if (local->hw.queues < IEEE80211_NUM_ACS) |
|
n_acs = 1; |
|
|
|
spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
|
if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || |
|
(local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && |
|
skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { |
|
for (ac = 0; ac < n_acs; ac++) { |
|
int ac_queue = sdata->vif.hw_queue[ac]; |
|
|
|
if (local->queue_stop_reasons[ac_queue] == 0 && |
|
skb_queue_empty(&local->pending[ac_queue])) |
|
netif_start_subqueue(dev, ac); |
|
} |
|
} |
|
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
|
} |
|
|
|
return 0; |
|
err_del_interface: |
|
drv_remove_interface(local, sdata); |
|
err_stop: |
|
if (!local->open_count) |
|
drv_stop(local); |
|
err_del_bss: |
|
sdata->bss = NULL; |
|
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
|
mutex_lock(&local->mtx); |
|
list_del(&sdata->u.vlan.list); |
|
mutex_unlock(&local->mtx); |
|
} |
|
/* might already be clear but that doesn't matter */ |
|
clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
|
return res; |
|
} |
|
|
|
static void ieee80211_if_free(struct net_device *dev) |
|
{ |
|
free_percpu(dev->tstats); |
|
} |
|
|
|
static void ieee80211_if_setup(struct net_device *dev) |
|
{ |
|
ether_setup(dev); |
|
dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
|
dev->netdev_ops = &ieee80211_dataif_ops; |
|
dev->needs_free_netdev = true; |
|
dev->priv_destructor = ieee80211_if_free; |
|
} |
|
|
|
static void ieee80211_if_setup_no_queue(struct net_device *dev) |
|
{ |
|
ieee80211_if_setup(dev); |
|
dev->priv_flags |= IFF_NO_QUEUE; |
|
} |
|
|
|
static void ieee80211_iface_work(struct work_struct *work) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = |
|
container_of(work, struct ieee80211_sub_if_data, work); |
|
struct ieee80211_local *local = sdata->local; |
|
struct sk_buff *skb; |
|
struct sta_info *sta; |
|
|
|
if (!ieee80211_sdata_running(sdata)) |
|
return; |
|
|
|
if (test_bit(SCAN_SW_SCANNING, &local->scanning)) |
|
return; |
|
|
|
if (!ieee80211_can_run_worker(local)) |
|
return; |
|
|
|
/* first process frames */ |
|
while ((skb = skb_dequeue(&sdata->skb_queue))) { |
|
struct ieee80211_mgmt *mgmt = (void *)skb->data; |
|
|
|
kcov_remote_start_common(skb_get_kcov_handle(skb)); |
|
if (ieee80211_is_action(mgmt->frame_control) && |
|
mgmt->u.action.category == WLAN_CATEGORY_BACK) { |
|
int len = skb->len; |
|
|
|
mutex_lock(&local->sta_mtx); |
|
sta = sta_info_get_bss(sdata, mgmt->sa); |
|
if (sta) { |
|
switch (mgmt->u.action.u.addba_req.action_code) { |
|
case WLAN_ACTION_ADDBA_REQ: |
|
ieee80211_process_addba_request( |
|
local, sta, mgmt, len); |
|
break; |
|
case WLAN_ACTION_ADDBA_RESP: |
|
ieee80211_process_addba_resp(local, sta, |
|
mgmt, len); |
|
break; |
|
case WLAN_ACTION_DELBA: |
|
ieee80211_process_delba(sdata, sta, |
|
mgmt, len); |
|
break; |
|
default: |
|
WARN_ON(1); |
|
break; |
|
} |
|
} |
|
mutex_unlock(&local->sta_mtx); |
|
} else if (ieee80211_is_action(mgmt->frame_control) && |
|
mgmt->u.action.category == WLAN_CATEGORY_VHT) { |
|
switch (mgmt->u.action.u.vht_group_notif.action_code) { |
|
case WLAN_VHT_ACTION_OPMODE_NOTIF: { |
|
struct ieee80211_rx_status *status; |
|
enum nl80211_band band; |
|
u8 opmode; |
|
|
|
status = IEEE80211_SKB_RXCB(skb); |
|
band = status->band; |
|
opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; |
|
|
|
mutex_lock(&local->sta_mtx); |
|
sta = sta_info_get_bss(sdata, mgmt->sa); |
|
|
|
if (sta) |
|
ieee80211_vht_handle_opmode(sdata, sta, |
|
opmode, |
|
band); |
|
|
|
mutex_unlock(&local->sta_mtx); |
|
break; |
|
} |
|
case WLAN_VHT_ACTION_GROUPID_MGMT: |
|
ieee80211_process_mu_groups(sdata, mgmt); |
|
break; |
|
default: |
|
WARN_ON(1); |
|
break; |
|
} |
|
} else if (ieee80211_is_ext(mgmt->frame_control)) { |
|
if (sdata->vif.type == NL80211_IFTYPE_STATION) |
|
ieee80211_sta_rx_queued_ext(sdata, skb); |
|
else |
|
WARN_ON(1); |
|
} else if (ieee80211_is_data_qos(mgmt->frame_control)) { |
|
struct ieee80211_hdr *hdr = (void *)mgmt; |
|
/* |
|
* So the frame isn't mgmt, but frame_control |
|
* is at the right place anyway, of course, so |
|
* the if statement is correct. |
|
* |
|
* Warn if we have other data frame types here, |
|
* they must not get here. |
|
*/ |
|
WARN_ON(hdr->frame_control & |
|
cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); |
|
WARN_ON(!(hdr->seq_ctrl & |
|
cpu_to_le16(IEEE80211_SCTL_FRAG))); |
|
/* |
|
* This was a fragment of a frame, received while |
|
* a block-ack session was active. That cannot be |
|
* right, so terminate the session. |
|
*/ |
|
mutex_lock(&local->sta_mtx); |
|
sta = sta_info_get_bss(sdata, mgmt->sa); |
|
if (sta) { |
|
u16 tid = ieee80211_get_tid(hdr); |
|
|
|
__ieee80211_stop_rx_ba_session( |
|
sta, tid, WLAN_BACK_RECIPIENT, |
|
WLAN_REASON_QSTA_REQUIRE_SETUP, |
|
true); |
|
} |
|
mutex_unlock(&local->sta_mtx); |
|
} else switch (sdata->vif.type) { |
|
case NL80211_IFTYPE_STATION: |
|
ieee80211_sta_rx_queued_mgmt(sdata, skb); |
|
break; |
|
case NL80211_IFTYPE_ADHOC: |
|
ieee80211_ibss_rx_queued_mgmt(sdata, skb); |
|
break; |
|
case NL80211_IFTYPE_MESH_POINT: |
|
if (!ieee80211_vif_is_mesh(&sdata->vif)) |
|
break; |
|
ieee80211_mesh_rx_queued_mgmt(sdata, skb); |
|
break; |
|
default: |
|
WARN(1, "frame for unexpected interface type"); |
|
break; |
|
} |
|
|
|
kfree_skb(skb); |
|
kcov_remote_stop(); |
|
} |
|
|
|
/* then other type-dependent work */ |
|
switch (sdata->vif.type) { |
|
case NL80211_IFTYPE_STATION: |
|
ieee80211_sta_work(sdata); |
|
break; |
|
case NL80211_IFTYPE_ADHOC: |
|
ieee80211_ibss_work(sdata); |
|
break; |
|
case NL80211_IFTYPE_MESH_POINT: |
|
if (!ieee80211_vif_is_mesh(&sdata->vif)) |
|
break; |
|
ieee80211_mesh_work(sdata); |
|
break; |
|
case NL80211_IFTYPE_OCB: |
|
ieee80211_ocb_work(sdata); |
|
break; |
|
default: |
|
break; |
|
} |
|
} |
|
|
|
static void ieee80211_recalc_smps_work(struct work_struct *work) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = |
|
container_of(work, struct ieee80211_sub_if_data, recalc_smps); |
|
|
|
ieee80211_recalc_smps(sdata); |
|
} |
|
|
|
/* |
|
* 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) |
|
{ |
|
static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, |
|
0xff, 0xff, 0xff}; |
|
|
|
/* clear type-dependent union */ |
|
memset(&sdata->u, 0, sizeof(sdata->u)); |
|
|
|
/* and set some type-dependent values */ |
|
sdata->vif.type = type; |
|
sdata->vif.p2p = false; |
|
sdata->wdev.iftype = type; |
|
|
|
sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); |
|
sdata->control_port_no_encrypt = false; |
|
sdata->control_port_over_nl80211 = false; |
|
sdata->control_port_no_preauth = false; |
|
sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; |
|
sdata->vif.bss_conf.idle = true; |
|
sdata->vif.bss_conf.txpower = INT_MIN; /* unset */ |
|
|
|
sdata->noack_map = 0; |
|
|
|
/* only monitor/p2p-device differ */ |
|
if (sdata->dev) { |
|
sdata->dev->netdev_ops = &ieee80211_dataif_ops; |
|
sdata->dev->type = ARPHRD_ETHER; |
|
} |
|
|
|
skb_queue_head_init(&sdata->skb_queue); |
|
INIT_WORK(&sdata->work, ieee80211_iface_work); |
|
INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); |
|
INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); |
|
INIT_LIST_HEAD(&sdata->assigned_chanctx_list); |
|
INIT_LIST_HEAD(&sdata->reserved_chanctx_list); |
|
|
|
switch (type) { |
|
case NL80211_IFTYPE_P2P_GO: |
|
type = NL80211_IFTYPE_AP; |
|
sdata->vif.type = type; |
|
sdata->vif.p2p = true; |
|
fallthrough; |
|
case NL80211_IFTYPE_AP: |
|
skb_queue_head_init(&sdata->u.ap.ps.bc_buf); |
|
INIT_LIST_HEAD(&sdata->u.ap.vlans); |
|
sdata->vif.bss_conf.bssid = sdata->vif.addr; |
|
break; |
|
case NL80211_IFTYPE_P2P_CLIENT: |
|
type = NL80211_IFTYPE_STATION; |
|
sdata->vif.type = type; |
|
sdata->vif.p2p = true; |
|
fallthrough; |
|
case NL80211_IFTYPE_STATION: |
|
sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; |
|
ieee80211_sta_setup_sdata(sdata); |
|
break; |
|
case NL80211_IFTYPE_OCB: |
|
sdata->vif.bss_conf.bssid = bssid_wildcard; |
|
ieee80211_ocb_setup_sdata(sdata); |
|
break; |
|
case NL80211_IFTYPE_ADHOC: |
|
sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; |
|
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_NAN: |
|
idr_init(&sdata->u.nan.function_inst_ids); |
|
spin_lock_init(&sdata->u.nan.func_lock); |
|
sdata->vif.bss_conf.bssid = sdata->vif.addr; |
|
break; |
|
case NL80211_IFTYPE_AP_VLAN: |
|
case NL80211_IFTYPE_P2P_DEVICE: |
|
sdata->vif.bss_conf.bssid = sdata->vif.addr; |
|
break; |
|
case NL80211_IFTYPE_UNSPECIFIED: |
|
case NL80211_IFTYPE_WDS: |
|
case NUM_NL80211_IFTYPES: |
|
WARN_ON(1); |
|
break; |
|
} |
|
|
|
ieee80211_debugfs_add_netdev(sdata); |
|
} |
|
|
|
static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, |
|
enum nl80211_iftype type) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
int ret, err; |
|
enum nl80211_iftype internal_type = type; |
|
bool p2p = false; |
|
|
|
ASSERT_RTNL(); |
|
|
|
if (!local->ops->change_interface) |
|
return -EBUSY; |
|
|
|
switch (sdata->vif.type) { |
|
case NL80211_IFTYPE_AP: |
|
case NL80211_IFTYPE_STATION: |
|
case NL80211_IFTYPE_ADHOC: |
|
case NL80211_IFTYPE_OCB: |
|
/* |
|
* Could maybe also all others here? |
|
* Just not sure how that interacts |
|
* with the RX/config path e.g. for |
|
* mesh. |
|
*/ |
|
break; |
|
default: |
|
return -EBUSY; |
|
} |
|
|
|
switch (type) { |
|
case NL80211_IFTYPE_AP: |
|
case NL80211_IFTYPE_STATION: |
|
case NL80211_IFTYPE_ADHOC: |
|
case NL80211_IFTYPE_OCB: |
|
/* |
|
* Could probably support everything |
|
* but here. |
|
*/ |
|
break; |
|
case NL80211_IFTYPE_P2P_CLIENT: |
|
p2p = true; |
|
internal_type = NL80211_IFTYPE_STATION; |
|
break; |
|
case NL80211_IFTYPE_P2P_GO: |
|
p2p = true; |
|
internal_type = NL80211_IFTYPE_AP; |
|
break; |
|
default: |
|
return -EBUSY; |
|
} |
|
|
|
ret = ieee80211_check_concurrent_iface(sdata, internal_type); |
|
if (ret) |
|
return ret; |
|
|
|
ieee80211_stop_vif_queues(local, sdata, |
|
IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); |
|
synchronize_net(); |
|
|
|
ieee80211_do_stop(sdata, false); |
|
|
|
ieee80211_teardown_sdata(sdata); |
|
|
|
ieee80211_set_sdata_offload_flags(sdata); |
|
ret = drv_change_interface(local, sdata, internal_type, p2p); |
|
if (ret) |
|
type = ieee80211_vif_type_p2p(&sdata->vif); |
|
|
|
/* |
|
* Ignore return value here, there's not much we can do since |
|
* the driver changed the interface type internally already. |
|
* The warnings will hopefully make driver authors fix it :-) |
|
*/ |
|
ieee80211_check_queues(sdata, type); |
|
|
|
ieee80211_setup_sdata(sdata, type); |
|
ieee80211_set_vif_encap_ops(sdata); |
|
|
|
err = ieee80211_do_open(&sdata->wdev, false); |
|
WARN(err, "type change: do_open returned %d", err); |
|
|
|
ieee80211_wake_vif_queues(local, sdata, |
|
IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); |
|
return ret; |
|
} |
|
|
|
int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
|
enum nl80211_iftype type) |
|
{ |
|
int ret; |
|
|
|
ASSERT_RTNL(); |
|
|
|
if (type == ieee80211_vif_type_p2p(&sdata->vif)) |
|
return 0; |
|
|
|
if (ieee80211_sdata_running(sdata)) { |
|
ret = ieee80211_runtime_change_iftype(sdata, type); |
|
if (ret) |
|
return ret; |
|
} else { |
|
/* Purge and reset type-dependent state. */ |
|
ieee80211_teardown_sdata(sdata); |
|
ieee80211_setup_sdata(sdata, type); |
|
} |
|
|
|
/* reset some values that shouldn't be kept across type changes */ |
|
if (type == NL80211_IFTYPE_STATION) |
|
sdata->u.mgd.use_4addr = false; |
|
|
|
return 0; |
|
} |
|
|
|
static void ieee80211_assign_perm_addr(struct ieee80211_local *local, |
|
u8 *perm_addr, enum nl80211_iftype type) |
|
{ |
|
struct ieee80211_sub_if_data *sdata; |
|
u64 mask, start, addr, val, inc; |
|
u8 *m; |
|
u8 tmp_addr[ETH_ALEN]; |
|
int i; |
|
|
|
/* default ... something at least */ |
|
memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); |
|
|
|
if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && |
|
local->hw.wiphy->n_addresses <= 1) |
|
return; |
|
|
|
mutex_lock(&local->iflist_mtx); |
|
|
|
switch (type) { |
|
case NL80211_IFTYPE_MONITOR: |
|
/* doesn't matter */ |
|
break; |
|
case NL80211_IFTYPE_AP_VLAN: |
|
/* match up with an AP interface */ |
|
list_for_each_entry(sdata, &local->interfaces, list) { |
|
if (sdata->vif.type != NL80211_IFTYPE_AP) |
|
continue; |
|
memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); |
|
break; |
|
} |
|
/* keep default if no AP interface present */ |
|
break; |
|
case NL80211_IFTYPE_P2P_CLIENT: |
|
case NL80211_IFTYPE_P2P_GO: |
|
if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { |
|
list_for_each_entry(sdata, &local->interfaces, list) { |
|
if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) |
|
continue; |
|
if (!ieee80211_sdata_running(sdata)) |
|
continue; |
|
memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); |
|
goto out_unlock; |
|
} |
|
} |
|
fallthrough; |
|
default: |
|
/* assign a new address if possible -- try n_addresses first */ |
|
for (i = 0; i < local->hw.wiphy->n_addresses; i++) { |
|
bool used = false; |
|
|
|
list_for_each_entry(sdata, &local->interfaces, list) { |
|
if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, |
|
sdata->vif.addr)) { |
|
used = true; |
|
break; |
|
} |
|
} |
|
|
|
if (!used) { |
|
memcpy(perm_addr, |
|
local->hw.wiphy->addresses[i].addr, |
|
ETH_ALEN); |
|
break; |
|
} |
|
} |
|
|
|
/* try mask if available */ |
|
if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) |
|
break; |
|
|
|
m = local->hw.wiphy->addr_mask; |
|
mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
|
((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | |
|
((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); |
|
|
|
if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { |
|
/* not a contiguous mask ... not handled now! */ |
|
pr_info("not contiguous\n"); |
|
break; |
|
} |
|
|
|
/* |
|
* Pick address of existing interface in case user changed |
|
* MAC address manually, default to perm_addr. |
|
*/ |
|
m = local->hw.wiphy->perm_addr; |
|
list_for_each_entry(sdata, &local->interfaces, list) { |
|
if (sdata->vif.type == NL80211_IFTYPE_MONITOR) |
|
continue; |
|
m = sdata->vif.addr; |
|
break; |
|
} |
|
start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | |
|
((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | |
|
((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); |
|
|
|
inc = 1ULL<<__ffs64(mask); |
|
val = (start & mask); |
|
addr = (start & ~mask) | (val & mask); |
|
do { |
|
bool used = false; |
|
|
|
tmp_addr[5] = addr >> 0*8; |
|
tmp_addr[4] = addr >> 1*8; |
|
tmp_addr[3] = addr >> 2*8; |
|
tmp_addr[2] = addr >> 3*8; |
|
tmp_addr[1] = addr >> 4*8; |
|
tmp_addr[0] = addr >> 5*8; |
|
|
|
val += inc; |
|
|
|
list_for_each_entry(sdata, &local->interfaces, list) { |
|
if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { |
|
used = true; |
|
break; |
|
} |
|
} |
|
|
|
if (!used) { |
|
memcpy(perm_addr, tmp_addr, ETH_ALEN); |
|
break; |
|
} |
|
addr = (start & ~mask) | (val & mask); |
|
} while (addr != start); |
|
|
|
break; |
|
} |
|
|
|
out_unlock: |
|
mutex_unlock(&local->iflist_mtx); |
|
} |
|
|
|
int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
|
unsigned char name_assign_type, |
|
struct wireless_dev **new_wdev, enum nl80211_iftype type, |
|
struct vif_params *params) |
|
{ |
|
struct net_device *ndev = NULL; |
|
struct ieee80211_sub_if_data *sdata = NULL; |
|
struct txq_info *txqi; |
|
void (*if_setup)(struct net_device *dev); |
|
int ret, i; |
|
int txqs = 1; |
|
|
|
ASSERT_RTNL(); |
|
|
|
if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { |
|
struct wireless_dev *wdev; |
|
|
|
sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, |
|
GFP_KERNEL); |
|
if (!sdata) |
|
return -ENOMEM; |
|
wdev = &sdata->wdev; |
|
|
|
sdata->dev = NULL; |
|
strlcpy(sdata->name, name, IFNAMSIZ); |
|
ieee80211_assign_perm_addr(local, wdev->address, type); |
|
memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); |
|
} else { |
|
int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, |
|
sizeof(void *)); |
|
int txq_size = 0; |
|
|
|
if (local->ops->wake_tx_queue && |
|
type != NL80211_IFTYPE_AP_VLAN && |
|
(type != NL80211_IFTYPE_MONITOR || |
|
(params->flags & MONITOR_FLAG_ACTIVE))) |
|
txq_size += sizeof(struct txq_info) + |
|
local->hw.txq_data_size; |
|
|
|
if (local->ops->wake_tx_queue) { |
|
if_setup = ieee80211_if_setup_no_queue; |
|
} else { |
|
if_setup = ieee80211_if_setup; |
|
if (local->hw.queues >= IEEE80211_NUM_ACS) |
|
txqs = IEEE80211_NUM_ACS; |
|
} |
|
|
|
ndev = alloc_netdev_mqs(size + txq_size, |
|
name, name_assign_type, |
|
if_setup, txqs, 1); |
|
if (!ndev) |
|
return -ENOMEM; |
|
|
|
if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len) |
|
ndev->tx_queue_len = local->hw.wiphy->tx_queue_len; |
|
|
|
dev_net_set(ndev, wiphy_net(local->hw.wiphy)); |
|
|
|
ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
|
if (!ndev->tstats) { |
|
free_netdev(ndev); |
|
return -ENOMEM; |
|
} |
|
|
|
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) { |
|
ieee80211_if_free(ndev); |
|
free_netdev(ndev); |
|
return ret; |
|
} |
|
|
|
ieee80211_assign_perm_addr(local, ndev->perm_addr, type); |
|
if (is_valid_ether_addr(params->macaddr)) |
|
memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN); |
|
else |
|
memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); |
|
SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); |
|
|
|
/* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ |
|
sdata = netdev_priv(ndev); |
|
ndev->ieee80211_ptr = &sdata->wdev; |
|
memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); |
|
memcpy(sdata->name, ndev->name, IFNAMSIZ); |
|
|
|
if (txq_size) { |
|
txqi = netdev_priv(ndev) + size; |
|
ieee80211_txq_init(sdata, NULL, txqi, 0); |
|
} |
|
|
|
sdata->dev = ndev; |
|
} |
|
|
|
/* initialise type-independent data */ |
|
sdata->wdev.wiphy = local->hw.wiphy; |
|
sdata->local = local; |
|
|
|
for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
|
skb_queue_head_init(&sdata->fragments[i].skb_list); |
|
|
|
INIT_LIST_HEAD(&sdata->key_list); |
|
|
|
INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, |
|
ieee80211_dfs_cac_timer_work); |
|
INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, |
|
ieee80211_delayed_tailroom_dec); |
|
|
|
for (i = 0; i < NUM_NL80211_BANDS; i++) { |
|
struct ieee80211_supported_band *sband; |
|
sband = local->hw.wiphy->bands[i]; |
|
sdata->rc_rateidx_mask[i] = |
|
sband ? (1 << sband->n_bitrates) - 1 : 0; |
|
if (sband) { |
|
__le16 cap; |
|
u16 *vht_rate_mask; |
|
|
|
memcpy(sdata->rc_rateidx_mcs_mask[i], |
|
sband->ht_cap.mcs.rx_mask, |
|
sizeof(sdata->rc_rateidx_mcs_mask[i])); |
|
|
|
cap = sband->vht_cap.vht_mcs.rx_mcs_map; |
|
vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; |
|
ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); |
|
} else { |
|
memset(sdata->rc_rateidx_mcs_mask[i], 0, |
|
sizeof(sdata->rc_rateidx_mcs_mask[i])); |
|
memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, |
|
sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); |
|
} |
|
} |
|
|
|
ieee80211_set_default_queues(sdata); |
|
|
|
sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; |
|
sdata->user_power_level = local->user_power_level; |
|
|
|
sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; |
|
|
|
/* setup type-dependent data */ |
|
ieee80211_setup_sdata(sdata, type); |
|
|
|
if (ndev) { |
|
ndev->ieee80211_ptr->use_4addr = params->use_4addr; |
|
if (type == NL80211_IFTYPE_STATION) |
|
sdata->u.mgd.use_4addr = params->use_4addr; |
|
|
|
ndev->features |= local->hw.netdev_features; |
|
ndev->hw_features |= ndev->features & |
|
MAC80211_SUPPORTED_FEATURES_TX; |
|
|
|
netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); |
|
|
|
/* MTU range: 256 - 2304 */ |
|
ndev->min_mtu = 256; |
|
ndev->max_mtu = local->hw.max_mtu; |
|
|
|
ret = cfg80211_register_netdevice(ndev); |
|
if (ret) { |
|
free_netdev(ndev); |
|
return ret; |
|
} |
|
} |
|
|
|
mutex_lock(&local->iflist_mtx); |
|
list_add_tail_rcu(&sdata->list, &local->interfaces); |
|
mutex_unlock(&local->iflist_mtx); |
|
|
|
if (new_wdev) |
|
*new_wdev = &sdata->wdev; |
|
|
|
return 0; |
|
} |
|
|
|
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); |
|
|
|
if (sdata->vif.txq) |
|
ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); |
|
|
|
synchronize_rcu(); |
|
|
|
cfg80211_unregister_wdev(&sdata->wdev); |
|
|
|
if (!sdata->dev) { |
|
ieee80211_teardown_sdata(sdata); |
|
kfree(sdata); |
|
} |
|
} |
|
|
|
void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) |
|
return; |
|
ieee80211_do_stop(sdata, true); |
|
} |
|
|
|
void ieee80211_remove_interfaces(struct ieee80211_local *local) |
|
{ |
|
struct ieee80211_sub_if_data *sdata, *tmp; |
|
LIST_HEAD(unreg_list); |
|
LIST_HEAD(wdev_list); |
|
|
|
ASSERT_RTNL(); |
|
|
|
/* Before destroying the interfaces, make sure they're all stopped so |
|
* that the hardware is stopped. Otherwise, the driver might still be |
|
* iterating the interfaces during the shutdown, e.g. from a worker |
|
* or from RX processing or similar, and if it does so (using atomic |
|
* iteration) while we're manipulating the list, the iteration will |
|
* crash. |
|
* |
|
* After this, the hardware should be stopped and the driver should |
|
* have stopped all of its activities, so that we can do RCU-unaware |
|
* manipulations of the interface list below. |
|
*/ |
|
cfg80211_shutdown_all_interfaces(local->hw.wiphy); |
|
|
|
WARN(local->open_count, "%s: open count remains %d\n", |
|
wiphy_name(local->hw.wiphy), local->open_count); |
|
|
|
ieee80211_txq_teardown_flows(local); |
|
|
|
mutex_lock(&local->iflist_mtx); |
|
list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
|
list_del(&sdata->list); |
|
|
|
if (sdata->dev) |
|
unregister_netdevice_queue(sdata->dev, &unreg_list); |
|
else |
|
list_add(&sdata->list, &wdev_list); |
|
} |
|
mutex_unlock(&local->iflist_mtx); |
|
|
|
unregister_netdevice_many(&unreg_list); |
|
|
|
wiphy_lock(local->hw.wiphy); |
|
list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { |
|
list_del(&sdata->list); |
|
cfg80211_unregister_wdev(&sdata->wdev); |
|
kfree(sdata); |
|
} |
|
wiphy_unlock(local->hw.wiphy); |
|
} |
|
|
|
static int netdev_notify(struct notifier_block *nb, |
|
unsigned long state, void *ptr) |
|
{ |
|
struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
|
struct ieee80211_sub_if_data *sdata; |
|
|
|
if (state != NETDEV_CHANGENAME) |
|
return NOTIFY_DONE; |
|
|
|
if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) |
|
return NOTIFY_DONE; |
|
|
|
if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) |
|
return NOTIFY_DONE; |
|
|
|
sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
|
memcpy(sdata->name, dev->name, IFNAMSIZ); |
|
ieee80211_debugfs_rename_netdev(sdata); |
|
|
|
return NOTIFY_OK; |
|
} |
|
|
|
static struct notifier_block mac80211_netdev_notifier = { |
|
.notifier_call = netdev_notify, |
|
}; |
|
|
|
int ieee80211_iface_init(void) |
|
{ |
|
return register_netdevice_notifier(&mac80211_netdev_notifier); |
|
} |
|
|
|
void ieee80211_iface_exit(void) |
|
{ |
|
unregister_netdevice_notifier(&mac80211_netdev_notifier); |
|
} |
|
|
|
void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
if (sdata->vif.type == NL80211_IFTYPE_AP) |
|
atomic_inc(&sdata->u.ap.num_mcast_sta); |
|
else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
|
atomic_inc(&sdata->u.vlan.num_mcast_sta); |
|
} |
|
|
|
void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) |
|
{ |
|
if (sdata->vif.type == NL80211_IFTYPE_AP) |
|
atomic_dec(&sdata->u.ap.num_mcast_sta); |
|
else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
|
atomic_dec(&sdata->u.vlan.num_mcast_sta); |
|
}
|
|
|