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iface.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Interface handling
*
* Copyright 2002-2005, Instant802 Networks, Inc.
* Copyright 2005-2006, Devicescape Software, Inc.
* Copyright (c) 2006 Jiri Benc <[email protected]>
* Copyright 2008, Johannes Berg <[email protected]>
* Copyright 2013-2014 Intel Mobile Communications GmbH
* Copyright (c) 2016 Intel Deutschland GmbH
* Copyright (C) 2018-2023 Intel Corporation
*/
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/if_arp.h>
#include <linux/netdevice.h>
#include <linux/rtnetlink.h>
#include <linux/kcov.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 wiphy *wiphy, struct wiphy_work *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.bss_conf.chanctx_conf);
if (!chanctx_conf) {
rcu_read_unlock();
return false;
}
power = ieee80211_chandef_max_power(&chanctx_conf->def);
rcu_read_unlock();
if (sdata->deflink.user_power_level != IEEE80211_UNSET_POWER_LEVEL)
power = min(power, sdata->deflink.user_power_level);
if (sdata->deflink.ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
power = min(power, sdata->deflink.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_link_info_change_notify(sdata, &sdata->deflink,
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_can_powered_addr_change(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_roc_work *roc;
struct ieee80211_local *local = sdata->local;
struct ieee80211_sub_if_data *scan_sdata;
int ret = 0;
/* To be the most flexible here we want to only limit changing the
* address if the specific interface is doing offchannel work or
* scanning.
*/
if (netif_carrier_ok(sdata->dev))
return -EBUSY;
mutex_lock(&local->mtx);
/* First check no ROC work is happening on this iface */
list_for_each_entry(roc, &local->roc_list, list) {
if (roc->sdata != sdata)
continue;
if (roc->started) {
ret = -EBUSY;
goto unlock;
}
}
/* And if this iface is scanning */
if (local->scanning) {
scan_sdata = rcu_dereference_protected(local->scan_sdata,
lockdep_is_held(&local->mtx));
if (sdata == scan_sdata)
ret = -EBUSY;
}
switch (sdata->vif.type) {
case NL80211_IFTYPE_STATION:
case NL80211_IFTYPE_P2P_CLIENT:
/* More interface types could be added here but changing the
* address while powered makes the most sense in client modes.
*/
break;
default:
ret = -EOPNOTSUPP;
}
unlock:
mutex_unlock(&local->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 ieee80211_local *local = sdata->local;
struct sockaddr *sa = addr;
bool check_dup = true;
bool live = false;
int ret;
if (ieee80211_sdata_running(sdata)) {
ret = ieee80211_can_powered_addr_change(sdata);
if (ret)
return ret;
live = true;
}
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;
if (live)
drv_remove_interface(local, sdata);
ret = eth_mac_addr(dev, sa);
if (ret == 0) {
memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
}
/* Regardless of eth_mac_addr() return we still want to add the
* interface back. This should not fail...
*/
if (live)
WARN_ON(drv_add_interface(local, sdata));
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_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.bss_conf.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;
/* No support for VLAN with MLO yet */
if (iftype == NL80211_IFTYPE_AP_VLAN &&
sdata->wdev.use_4addr &&
nsdata->vif.type == NL80211_IFTYPE_AP &&
nsdata->vif.valid_links)
return -EOPNOTSUPP;
/*
* 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;
}
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;
wiphy_lock(sdata->local->hw.wiphy);
err = ieee80211_do_open(&sdata->wdev, true);
wiphy_unlock(sdata->local->hw.wiphy);
return err;
}
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);
synchronize_rcu(); /* flush _ieee80211_wake_txqs() */
cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
if (cancel_scan)
ieee80211_scan_cancel(local);
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_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!)
*
* 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 && flushed > 0);
/* 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);
WARN(ieee80211_vif_is_mld(&sdata->vif),
"destroying interface with valid links 0x%04x\n",
sdata->vif.valid_links);
mutex_lock(&local->mtx);
sdata->vif.bss_conf.csa_active = false;
if (sdata->vif.type == NL80211_IFTYPE_STATION)
sdata->deflink.u.mgd.csa_waiting_bcn = false;
if (sdata->deflink.csa_block_tx) {
ieee80211_wake_vif_queues(local, sdata,
IEEE80211_QUEUE_STOP_REASON_CSA);
sdata->deflink.csa_block_tx = false;
}
mutex_unlock(&local->mtx);
sdata_unlock(sdata);
cancel_work_sync(&sdata->deflink.csa_finalize_work);
cancel_work_sync(&sdata->deflink.color_change_finalize_work);
cancel_delayed_work_sync(&sdata->deflink.dfs_cac_timer_work);
if (sdata->wdev.cac_started) {
chandef = sdata->vif.bss_conf.chandef;
WARN_ON(local->suspended);
mutex_lock(&local->mtx);
ieee80211_link_release_channel(&sdata->deflink);
mutex_unlock(&local->mtx);
cfg80211_cac_event(sdata->dev, &chandef,
NL80211_RADAR_CAC_ABORTED,
GFP_KERNEL);
}
if (sdata->vif.type == NL80211_IFTYPE_AP) {
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.bss_conf.chanctx_conf, NULL);
/* see comment in the default case below */
ieee80211_free_keys(sdata, true);
/* no need to tell driver */
break;
case NL80211_IFTYPE_MONITOR:
if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
local->cooked_mntrs--;
break;
}
local->monitors--;
if (local->monitors == 0) {
local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
}
ieee80211_adjust_monitor_flags(sdata, -1);
break;
case NL80211_IFTYPE_NAN:
/* clean all the functions */
spin_lock_bh(&sdata->u.nan.func_lock);
idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
idr_remove(&sdata->u.nan.function_inst_ids, i);
cfg80211_free_nan_func(func);
}
idr_destroy(&sdata->u.nan.function_inst_ids);
spin_unlock_bh(&sdata->u.nan.func_lock);
break;
case NL80211_IFTYPE_P2P_DEVICE:
/* relies on synchronize_rcu() below */
RCU_INIT_POINTER(local->p2p_sdata, NULL);
fallthrough;
default:
wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work);
/*
* When we get here, the interface is marked down.
* Free the remaining keys, if there are any
* (which can happen in AP mode if userspace sets
* keys before the interface is operating)
*
* Force the key freeing to always synchronize_net()
* to wait for the RX path in case it is using this
* interface enqueuing frames at this very time on
* another CPU.
*/
ieee80211_free_keys(sdata, true);
skb_queue_purge(&sdata->skb_queue);
skb_queue_purge(&sdata->status_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(rcu_access_pointer(local->monitor_sdata));
return;
}
switch (sdata->vif.type) {
case NL80211_IFTYPE_AP_VLAN:
break;
case NL80211_IFTYPE_MONITOR:
if (local->monitors == 0)
ieee80211_del_virtual_monitor(local);
mutex_lock(&local->mtx);
ieee80211_recalc_idle(local);
mutex_unlock(&local->mtx);
if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
break;
fallthrough;
default:
if (going_down)
drv_remove_interface(local, sdata);
}
ieee80211_recalc_ps(local);
if (cancel_scan)
flush_delayed_work(&local->scan_work);
if (local->open_count == 0) {
ieee80211_stop_device(local);
/* no reconfiguring after stop! */
return;
}
/* do after stop to avoid reconfiguring when we stop anyway */
ieee80211_configure_filter(local);
ieee80211_hw_config(local, hw_reconf_flags);
if (local->monitors == local->open_count)
ieee80211_add_virtual_monitor(local);
}
static void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_sub_if_data *tx_sdata, *non_tx_sdata, *tmp_sdata;
struct ieee80211_vif *tx_vif = sdata->vif.mbssid_tx_vif;
if (!tx_vif)
return;
tx_sdata = vif_to_sdata(tx_vif);
sdata->vif.mbssid_tx_vif = NULL;
list_for_each_entry_safe(non_tx_sdata, tmp_sdata,
&tx_sdata->local->interfaces, list) {
if (non_tx_sdata != sdata && non_tx_sdata != tx_sdata &&
non_tx_sdata->vif.mbssid_tx_vif == tx_vif &&
ieee80211_sdata_running(non_tx_sdata)) {
non_tx_sdata->vif.mbssid_tx_vif = NULL;
dev_close(non_tx_sdata->wdev.netdev);
}
}
if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata)) {
tx_sdata->vif.mbssid_tx_vif = NULL;
dev_close(tx_sdata->wdev.netdev);
}
}
static int ieee80211_stop(struct net_device *dev)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
/* close dependent VLAN and MBSSID interfaces before locking wiphy */
if (sdata->vif.type == NL80211_IFTYPE_AP) {
struct ieee80211_sub_if_data *vlan, *tmpsdata;
list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
u.vlan.list)
dev_close(vlan->dev);
ieee80211_stop_mbssid(sdata);
}
cancel_work_sync(&sdata->activate_links_work);
wiphy_lock(sdata->local->hw.wiphy);
ieee80211_do_stop(sdata, true);
wiphy_unlock(sdata->local->hw.wiphy);
return 0;
}
static void ieee80211_set_multicast_list(struct net_device *dev)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct ieee80211_local *local = sdata->local;
int allmulti, sdata_allmulti;
allmulti = !!(dev->flags & IFF_ALLMULTI);
sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
if (allmulti != sdata_allmulti) {
if (dev->flags & IFF_ALLMULTI)
atomic_inc(&local->iff_allmultis);
else
atomic_dec(&local->iff_allmultis);
sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
}
spin_lock_bh(&local->filter_lock);
__hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
spin_unlock_bh(&local->filter_lock);
ieee80211_queue_work(&local->hw, &local->reconfig_filter);
}
/*
* Called when the netdev is removed or, by the code below, before
* the interface type changes.
*/
static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
{
/* free extra data */
ieee80211_free_keys(sdata, false);
ieee80211_debugfs_remove_netdev(sdata);
ieee80211_destroy_frag_cache(&sdata->frags);
if (ieee80211_vif_is_mesh(&sdata->vif))
ieee80211_mesh_teardown_sdata(sdata);
ieee80211_vif_clear_links(sdata);
ieee80211_link_stop(&sdata->deflink);
}
static void ieee80211_uninit(struct net_device *dev)
{
ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
}
static void
ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
{
dev_fetch_sw_netstats(stats, dev->tstats);
}
static int ieee80211_netdev_setup_tc(struct net_device *dev,
enum tc_setup_type type, void *type_data)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct ieee80211_local *local = sdata->local;
return drv_net_setup_tc(local, sdata, dev, type, type_data);
}
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_get_stats64 = ieee80211_get_stats64,
.ndo_setup_tc = ieee80211_netdev_setup_tc,
};
static u16 ieee80211_monitor_select_queue(struct net_device *dev,
struct sk_buff *skb,
struct net_device *sb_dev)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct ieee80211_local *local = sdata->local;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_hdr *hdr;
int len_rthdr;
if (local->hw.queues < IEEE80211_NUM_ACS)
return 0;
/* reset flags and info before parsing radiotap header */
memset(info, 0, sizeof(*info));
if (!ieee80211_parse_tx_radiotap(skb, dev))
return 0; /* doesn't matter, frame will be dropped */
len_rthdr = ieee80211_get_radiotap_len(skb->data);
hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
if (skb->len < len_rthdr + 2 ||
skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
return 0; /* doesn't matter, frame will be dropped */
return ieee80211_select_queue_80211(sdata, skb, hdr);
}
static const struct net_device_ops ieee80211_monitorif_ops = {
.ndo_open = ieee80211_open,
.ndo_stop = ieee80211_stop,
.ndo_uninit = ieee80211_uninit,
.ndo_start_xmit = ieee80211_monitor_start_xmit,
.ndo_set_rx_mode = ieee80211_set_multicast_list,
.ndo_set_mac_address = ieee80211_change_mac,
.ndo_select_queue = ieee80211_monitor_select_queue,
.ndo_get_stats64 = ieee80211_get_stats64,
};
static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx,
struct net_device_path *path)
{
struct ieee80211_sub_if_data *sdata;
struct ieee80211_local *local;
struct sta_info *sta;
int ret = -ENOENT;
sdata = IEEE80211_DEV_TO_SUB_IF(ctx->dev);
local = sdata->local;
if (!local->ops->net_fill_forward_path)
return -EOPNOTSUPP;
rcu_read_lock();
switch (sdata->vif.type) {
case NL80211_IFTYPE_AP_VLAN:
sta = rcu_dereference(sdata->u.vlan.sta);
if (sta)
break;
if (sdata->wdev.use_4addr)
goto out;
if (is_multicast_ether_addr(ctx->daddr))
goto out;
sta = sta_info_get_bss(sdata, ctx->daddr);
break;
case NL80211_IFTYPE_AP:
if (is_multicast_ether_addr(ctx->daddr))
goto out;
sta = sta_info_get(sdata, ctx->daddr);
break;
case NL80211_IFTYPE_STATION:
if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
sta = sta_info_get(sdata, ctx->daddr);
if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
goto out;
break;
}
}
sta = sta_info_get(sdata, sdata->deflink.u.mgd.bssid);
break;
default:
goto out;
}
if (!sta)
goto out;
ret = drv_net_fill_forward_path(local, sdata, &sta->sta, ctx, path);
out:
rcu_read_unlock();
return ret;
}
static const struct net_device_ops ieee80211_dataif_8023_ops = {
.ndo_open = ieee80211_open,
.ndo_stop = ieee80211_stop,
.ndo_uninit = ieee80211_uninit,
.ndo_start_xmit = ieee80211_subif_start_xmit_8023,
.ndo_set_rx_mode = ieee80211_set_multicast_list,
.ndo_set_mac_address = ieee80211_change_mac,
.ndo_get_stats64 = ieee80211_get_stats64,
.ndo_fill_forward_path = ieee80211_netdev_fill_forward_path,
.ndo_setup_tc = ieee80211_netdev_setup_tc,
};
static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
{
switch (iftype) {
/* P2P GO and client are mapped to AP/STATION types */
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_STATION:
return true;
default:
return false;
}
}
static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
u32 flags;
flags = sdata->vif.offload_flags;
if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
local->hw.wiphy->frag_threshold != (u32)-1)
flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
if (local->monitors)
flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
} else {
flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
}
if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) &&
ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
if (local->monitors &&
!ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
} else {
flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
}
if (sdata->vif.offload_flags == flags)
return false;
sdata->vif.offload_flags = flags;
ieee80211_check_fast_rx_iface(sdata);
return true;
}
static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_sub_if_data *bss = sdata;