![Johannes Berg](/assets/img/avatar_default.png)
When an associated station changes its VHT operating mode this can/will affect the bandwidth it's using, and consequently we must recalculate the minimum bandwidth we need to use. Failure to do so can lead to one of two scenarios: 1) we use a too high bandwidth, this is benign 2) we use a too narrow bandwidth, causing rate control and actual PHY configuration to be out of sync, which can in turn cause problems/crashes Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2038 lines
53 KiB
C
2038 lines
53 KiB
C
/*
|
|
* 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->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);
|
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_WDS) {
|
|
/* Create STA entry for the WDS peer */
|
|
sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
|
|
GFP_KERNEL);
|
|
if (!sta) {
|
|
res = -ENOMEM;
|
|
goto err_del_interface;
|
|
}
|
|
|
|
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);
|
|
} else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
|
|
rcu_assign_pointer(local->p2p_sdata, sdata);
|
|
}
|
|
|
|
/*
|
|
* 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) {
|
|
/* XXX: for AP_VLAN, actually track AP queues */
|
|
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;
|
|
struct fq *fq = &local->fq;
|
|
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;
|
|
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);
|
|
}
|
|
|
|
sdata->bss = NULL;
|
|
|
|
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.txq) {
|
|
struct txq_info *txqi = to_txq_info(sdata->vif.txq);
|
|
|
|
spin_lock_bh(&fq->lock);
|
|
ieee80211_txq_purge(local, txqi);
|
|
spin_unlock_bh(&fq->lock);
|
|
}
|
|
|
|
if (local->open_count == 0)
|
|
ieee80211_clear_tx_pending(local);
|
|
|
|
/*
|
|
* 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,
|
|
void *accel_priv,
|
|
select_queue_fallback_t fallback)
|
|
{
|
|
return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
|
|
}
|
|
|
|
static struct rtnl_link_stats64 *
|
|
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;
|
|
}
|
|
|
|
return stats;
|
|
}
|
|
|
|
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,
|
|
void *accel_priv,
|
|
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);
|
|
free_netdev(dev);
|
|
}
|
|
|
|
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->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;
|
|
struct ieee80211_ra_tid *ra_tid;
|
|
struct ieee80211_rx_agg *rx_agg;
|
|
|
|
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 (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
|
|
ra_tid = (void *)&skb->cb;
|
|
ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
|
|
ra_tid->tid);
|
|
} else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
|
|
ra_tid = (void *)&skb->cb;
|
|
ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
|
|
ra_tid->tid);
|
|
} else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
|
|
rx_agg = (void *)&skb->cb;
|
|
mutex_lock(&local->sta_mtx);
|
|
sta = sta_info_get_bss(sdata, rx_agg->addr);
|
|
if (sta)
|
|
__ieee80211_start_rx_ba_session(sta,
|
|
0, 0, 0, 1, rx_agg->tid,
|
|
IEEE80211_MAX_AMPDU_BUF,
|
|
false, true);
|
|
mutex_unlock(&local->sta_mtx);
|
|
} else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
|
|
rx_agg = (void *)&skb->cb;
|
|
mutex_lock(&local->sta_mtx);
|
|
sta = sta_info_get_bss(sdata, rx_agg->addr);
|
|
if (sta)
|
|
__ieee80211_stop_rx_ba_session(sta,
|
|
rx_agg->tid,
|
|
WLAN_BACK_RECIPIENT, 0,
|
|
false);
|
|
mutex_unlock(&local->sta_mtx);
|
|
} else 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_qos_ctl(hdr) &
|
|
IEEE80211_QOS_CTL_TID_MASK;
|
|
|
|
__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:
|
|
BUG();
|
|
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;
|
|
}
|
|
}
|
|
/* otherwise 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)
|
|
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);
|
|
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) {
|
|
ieee80211_if_free(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);
|
|
}
|