v4.19.13 snapshot.
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
new file mode 100644
index 0000000..5f3c81e
--- /dev/null
+++ b/net/mac80211/iface.c
@@ -0,0 +1,2023 @@
+/*
+ * Interface handling
+ *
+ * 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>
+ * Copyright 2013-2014 Intel Mobile Communications GmbH
+ * Copyright (c) 2016 Intel Deutschland GmbH
+ *
+ * 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/slab.h>
+#include <linux/kernel.h>
+#include <linux/if_arp.h>
+#include <linux/netdevice.h>
+#include <linux/rtnetlink.h>
+#include <net/mac80211.h>
+#include <net/ieee80211_radiotap.h>
+#include "ieee80211_i.h"
+#include "sta_info.h"
+#include "debugfs_netdev.h"
+#include "mesh.h"
+#include "led.h"
+#include "driver-ops.h"
+#include "wme.h"
+#include "rate.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 void ieee80211_iface_work(struct work_struct *work);
+
+bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_chanctx_conf *chanctx_conf;
+ int power;
+
+ rcu_read_lock();
+ chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+ if (!chanctx_conf) {
+ rcu_read_unlock();
+ return false;
+ }
+
+ power = ieee80211_chandef_max_power(&chanctx_conf->def);
+ rcu_read_unlock();
+
+ if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
+ power = min(power, sdata->user_power_level);
+
+ if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
+ power = min(power, sdata->ap_power_level);
+
+ if (power != sdata->vif.bss_conf.txpower) {
+ sdata->vif.bss_conf.txpower = power;
+ ieee80211_hw_config(sdata->local, 0);
+ return true;
+ }
+
+ return false;
+}
+
+void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
+ bool update_bss)
+{
+ if (__ieee80211_recalc_txpower(sdata) ||
+ (update_bss && ieee80211_sdata_running(sdata)))
+ ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
+}
+
+static u32 __ieee80211_idle_off(struct ieee80211_local *local)
+{
+ if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
+ return 0;
+
+ 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;
+
+ ieee80211_flush_queues(local, NULL, false);
+
+ local->hw.conf.flags |= IEEE80211_CONF_IDLE;
+ return IEEE80211_CONF_CHANGE_IDLE;
+}
+
+static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
+ bool force_active)
+{
+ bool working, scanning, active;
+ unsigned int led_trig_start = 0, led_trig_stop = 0;
+
+ lockdep_assert_held(&local->mtx);
+
+ active = force_active ||
+ !list_empty(&local->chanctx_list) ||
+ local->monitors;
+
+ working = !local->ops->remain_on_channel &&
+ !list_empty(&local->roc_list);
+
+ scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
+ test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
+
+ if (working || scanning)
+ led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
+ else
+ led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
+
+ if (active)
+ led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
+ else
+ led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
+
+ ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
+
+ if (working || scanning || active)
+ return __ieee80211_idle_off(local);
+ return __ieee80211_idle_on(local);
+}
+
+u32 ieee80211_idle_off(struct ieee80211_local *local)
+{
+ return __ieee80211_recalc_idle(local, true);
+}
+
+void ieee80211_recalc_idle(struct ieee80211_local *local)
+{
+ u32 change = __ieee80211_recalc_idle(local, false);
+ if (change)
+ ieee80211_hw_config(local, change);
+}
+
+static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
+ bool check_dup)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_sub_if_data *iter;
+ u64 new, mask, tmp;
+ u8 *m;
+ int ret = 0;
+
+ if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
+ return 0;
+
+ m = addr;
+ new = ((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);
+
+ 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 (!check_dup)
+ return ret;
+
+ mutex_lock(&local->iflist_mtx);
+ list_for_each_entry(iter, &local->interfaces, list) {
+ if (iter == sdata)
+ continue;
+
+ if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
+ !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
+ continue;
+
+ m = iter->vif.addr;
+ tmp = ((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 ((new & ~mask) != (tmp & ~mask)) {
+ ret = -EINVAL;
+ break;
+ }
+ }
+ mutex_unlock(&local->iflist_mtx);
+
+ return ret;
+}
+
+static int ieee80211_change_mac(struct net_device *dev, void *addr)
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct sockaddr *sa = addr;
+ bool check_dup = true;
+ int ret;
+
+ if (ieee80211_sdata_running(sdata))
+ return -EBUSY;
+
+ if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
+ !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
+ check_dup = false;
+
+ ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
+ if (ret)
+ return ret;
+
+ ret = eth_mac_addr(dev, sa);
+
+ if (ret == 0)
+ memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
+
+ return ret;
+}
+
+static inline int identical_mac_addr_allowed(int type1, int type2)
+{
+ return type1 == NL80211_IFTYPE_MONITOR ||
+ type2 == NL80211_IFTYPE_MONITOR ||
+ type1 == NL80211_IFTYPE_P2P_DEVICE ||
+ type2 == NL80211_IFTYPE_P2P_DEVICE ||
+ (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_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
+ enum nl80211_iftype iftype)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_sub_if_data *nsdata;
+ int ret;
+
+ ASSERT_RTNL();
+
+ /* we hold the RTNL here so can safely walk the list */
+ list_for_each_entry(nsdata, &local->interfaces, list) {
+ if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
+ /*
+ * Only OCB and monitor mode may coexist
+ */
+ if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
+ nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
+ (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
+ nsdata->vif.type == NL80211_IFTYPE_OCB))
+ return -EBUSY;
+
+ /*
+ * 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 (iftype == NL80211_IFTYPE_ADHOC &&
+ nsdata->vif.type == NL80211_IFTYPE_ADHOC)
+ return -EBUSY;
+ /*
+ * will not add another interface while any channel
+ * switch is active.
+ */
+ if (nsdata->vif.csa_active)
+ return -EBUSY;
+
+ /*
+ * The remaining checks are only performed for interfaces
+ * with the same MAC address.
+ */
+ if (!ether_addr_equal(sdata->vif.addr,
+ nsdata->vif.addr))
+ continue;
+
+ /*
+ * check whether it may have the same address
+ */
+ if (!identical_mac_addr_allowed(iftype,
+ nsdata->vif.type))
+ return -ENOTUNIQ;
+
+ /*
+ * can only add VLANs to enabled APs
+ */
+ if (iftype == NL80211_IFTYPE_AP_VLAN &&
+ nsdata->vif.type == NL80211_IFTYPE_AP)
+ sdata->bss = &nsdata->u.ap;
+ }
+ }
+
+ mutex_lock(&local->chanctx_mtx);
+ ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
+ mutex_unlock(&local->chanctx_mtx);
+ return ret;
+}
+
+static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
+ enum nl80211_iftype iftype)
+{
+ int n_queues = sdata->local->hw.queues;
+ int i;
+
+ if (iftype == NL80211_IFTYPE_NAN)
+ return 0;
+
+ if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
+ for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+ if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
+ IEEE80211_INVAL_HW_QUEUE))
+ return -EINVAL;
+ if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
+ n_queues))
+ return -EINVAL;
+ }
+ }
+
+ if ((iftype != NL80211_IFTYPE_AP &&
+ iftype != NL80211_IFTYPE_P2P_GO &&
+ iftype != NL80211_IFTYPE_MESH_POINT) ||
+ !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
+ sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
+ return 0;
+ }
+
+ if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
+ return -EINVAL;
+
+ if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
+ return -EINVAL;
+
+ return 0;
+}
+
+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;
+ }
+
+ 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;
+ struct sta_info *sta;
+ u32 changed = 0;
+ int res;
+ u32 hw_reconf_flags = 0;
+
+ 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: {
+ 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->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:
+ /* 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);
+ } 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);
+ 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);
+
+ res = drv_add_interface(local, sdata);
+ if (res)
+ goto err_stop;
+ 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.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_WDS:
+ 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_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;
+ }
+
+ sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
+ sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
+ sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
+
+ res = sta_info_insert(sta);
+ if (res) {
+ /* STA has been freed */
+ goto err_del_interface;
+ }
+
+ rate_control_rate_init(sta);
+ netif_carrier_on(dev);
+ break;
+ 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 int ieee80211_open(struct net_device *dev)
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ int err;
+
+ /* fail early if user set an invalid address */
+ if (!is_valid_ether_addr(dev->dev_addr))
+ return -EADDRNOTAVAIL;
+
+ err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
+ if (err)
+ return err;
+
+ return ieee80211_do_open(&sdata->wdev, true);
+}
+
+static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
+ bool going_down)
+{
+ struct ieee80211_local *local = sdata->local;
+ unsigned long flags;
+ struct sk_buff *skb, *tmp;
+ u32 hw_reconf_flags = 0;
+ int i, flushed;
+ struct ps_data *ps;
+ struct cfg80211_chan_def chandef;
+ bool cancel_scan;
+ struct cfg80211_nan_func *func;
+
+ clear_bit(SDATA_STATE_RUNNING, &sdata->state);
+
+ cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
+ if (cancel_scan)
+ ieee80211_scan_cancel(local);
+
+ /*
+ * Stop TX on this interface first.
+ */
+ if (sdata->dev)
+ netif_tx_stop_all_queues(sdata->dev);
+
+ ieee80211_roc_purge(local, sdata);
+
+ switch (sdata->vif.type) {
+ case NL80211_IFTYPE_STATION:
+ ieee80211_mgd_stop(sdata);
+ break;
+ case NL80211_IFTYPE_ADHOC:
+ ieee80211_ibss_stop(sdata);
+ break;
+ case NL80211_IFTYPE_AP:
+ cancel_work_sync(&sdata->u.ap.request_smps_work);
+ break;
+ case NL80211_IFTYPE_MONITOR:
+ if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
+ break;
+ list_del_rcu(&sdata->u.mntr.list);
+ break;
+ default:
+ break;
+ }
+
+ /*
+ * 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!)
+ *
+ * In WDS mode a station must exist here and be flushed, for
+ * AP_VLANs stations may exist since there's nothing else that
+ * would have removed them, but in other modes there shouldn't
+ * be any stations.
+ */
+ flushed = sta_info_flush(sdata);
+ WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
+ ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
+ (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
+
+ /* don't count this interface for allmulti while it is down */
+ if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
+ atomic_dec(&local->iff_allmultis);
+
+ if (sdata->vif.type == NL80211_IFTYPE_AP) {
+ local->fif_pspoll--;
+ local->fif_probe_req--;
+ } 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,
+ 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);
+ /* fall through */
+ 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, and maybe
+ * also in WDS mode)
+ *
+ * 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;
+
+ /* fall through */
+ 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);
+
+ ieee80211_do_stop(sdata, true);
+
+ 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,
+ select_queue_fallback_t fallback)
+{
+ 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)
+{
+ int i;
+
+ for_each_possible_cpu(i) {
+ const struct pcpu_sw_netstats *tstats;
+ u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
+ unsigned int start;
+
+ tstats = per_cpu_ptr(dev->tstats, i);
+
+ do {
+ start = u64_stats_fetch_begin_irq(&tstats->syncp);
+ rx_packets = tstats->rx_packets;
+ tx_packets = tstats->tx_packets;
+ rx_bytes = tstats->rx_bytes;
+ tx_bytes = tstats->tx_bytes;
+ } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
+
+ stats->rx_packets += rx_packets;
+ stats->tx_packets += tx_packets;
+ stats->rx_bytes += rx_bytes;
+ stats->tx_bytes += tx_bytes;
+ }
+}
+
+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,
+ select_queue_fallback_t fallback)
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_hdr *hdr;
+ struct ieee80211_radiotap_header *rtap = (void *)skb->data;
+
+ if (local->hw.queues < IEEE80211_NUM_ACS)
+ return 0;
+
+ if (skb->len < 4 ||
+ skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
+ return 0; /* doesn't matter, frame will be dropped */
+
+ hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
+
+ 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 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;
+
+ 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_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);
+ }
+
+ /* 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->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
+ sdata->vif.bss_conf.idle = true;
+
+ 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;
+ /* fall through */
+ case NL80211_IFTYPE_AP:
+ skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
+ INIT_LIST_HEAD(&sdata->u.ap.vlans);
+ INIT_WORK(&sdata->u.ap.request_smps_work,
+ ieee80211_request_smps_ap_work);
+ sdata->vif.bss_conf.bssid = sdata->vif.addr;
+ sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
+ break;
+ case NL80211_IFTYPE_P2P_CLIENT:
+ type = NL80211_IFTYPE_STATION;
+ sdata->vif.type = type;
+ sdata->vif.p2p = true;
+ /* fall through */
+ 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_WDS:
+ sdata->vif.bss_conf.bssid = NULL;
+ 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 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 WDS here (WDS do_open can fail
+ * under memory pressure, which this
+ * code isn't prepared to handle).
+ */
+ 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_do_stop(sdata, false);
+
+ ieee80211_teardown_sdata(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);
+
+ err = ieee80211_do_open(&sdata->wdev, false);
+ WARN(err, "type change: do_open returned %d", err);
+
+ 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_WDS:
+ 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;
+ }
+ }
+ /* fall through */
+ 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;
+ 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 (params && 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) {
+ if (params) {
+ 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;
+
+ netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
+
+ /* MTU range: 256 - 2304 */
+ ndev->min_mtu = 256;
+ ndev->max_mtu = IEEE80211_MAX_DATA_LEN;
+
+ ret = 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);
+
+ synchronize_rcu();
+
+ if (sdata->dev) {
+ unregister_netdevice(sdata->dev);
+ } else {
+ cfg80211_unregister_wdev(&sdata->wdev);
+ 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);
+
+ 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);
+
+ list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
+ list_del(&sdata->list);
+ cfg80211_unregister_wdev(&sdata->wdev);
+ kfree(sdata);
+ }
+}
+
+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);
+}