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- /*
- * 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
- * Copyright (C) 2018 Intel Corporation
- *
- * 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_stop_vif_queues(local, sdata,
- IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
- synchronize_net();
- 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);
- 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_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);
- if (sdata->vif.txq)
- ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
- 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);
- 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);
- 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);
- }
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