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linux/net/mac80211/main.c
Johannes Berg 177c6ae972 wifi: mac80211: handle tasklet frames before stopping 
The code itself doesn't want to handle frames from the driver
if it's already stopped, but if the tasklet was queued before
and runs after the stop, then all bets are off. Flush queues
before actually stopping, RX should be off at this point since
all the interfaces are removed already, etc.

Reported-by: syzbot+8830db5d3593b5546d2e@syzkaller.appspotmail.com
Link: https://msgid.link/20240515135318.b05f11385c9a.I41c1b33a2e1814c3a7ef352cd7f2951b91785617@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2024-05-29 15:25:10 +02:00

1796 lines
51 KiB
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2002-2005, Instant802 Networks, Inc.
* Copyright 2005-2006, Devicescape Software, Inc.
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
* Copyright 2013-2014 Intel Mobile Communications GmbH
* Copyright (C) 2017 Intel Deutschland GmbH
* Copyright (C) 2018-2023 Intel Corporation
*/
#include <net/mac80211.h>
#include <linux/module.h>
#include <linux/fips.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/rtnetlink.h>
#include <linux/bitmap.h>
#include <linux/inetdevice.h>
#include <net/net_namespace.h>
#include <net/dropreason.h>
#include <net/cfg80211.h>
#include <net/addrconf.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
#include "rate.h"
#include "mesh.h"
#include "wep.h"
#include "led.h"
#include "debugfs.h"
void ieee80211_configure_filter(struct ieee80211_local *local)
{
u64 mc;
unsigned int changed_flags;
unsigned int new_flags = 0;
if (atomic_read(&local->iff_allmultis))
new_flags |= FIF_ALLMULTI;
if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
new_flags |= FIF_BCN_PRBRESP_PROMISC;
if (local->fif_probe_req || local->probe_req_reg)
new_flags |= FIF_PROBE_REQ;
if (local->fif_fcsfail)
new_flags |= FIF_FCSFAIL;
if (local->fif_plcpfail)
new_flags |= FIF_PLCPFAIL;
if (local->fif_control)
new_flags |= FIF_CONTROL;
if (local->fif_other_bss)
new_flags |= FIF_OTHER_BSS;
if (local->fif_pspoll)
new_flags |= FIF_PSPOLL;
if (local->rx_mcast_action_reg)
new_flags |= FIF_MCAST_ACTION;
spin_lock_bh(&local->filter_lock);
changed_flags = local->filter_flags ^ new_flags;
mc = drv_prepare_multicast(local, &local->mc_list);
spin_unlock_bh(&local->filter_lock);
/* be a bit nasty */
new_flags |= (1<<31);
drv_configure_filter(local, changed_flags, &new_flags, mc);
WARN_ON(new_flags & (1<<31));
local->filter_flags = new_flags & ~(1<<31);
}
static void ieee80211_reconfig_filter(struct wiphy *wiphy,
struct wiphy_work *work)
{
struct ieee80211_local *local =
container_of(work, struct ieee80211_local, reconfig_filter);
ieee80211_configure_filter(local);
}
static u32 ieee80211_calc_hw_conf_chan(struct ieee80211_local *local,
struct ieee80211_chanctx_conf *ctx)
{
struct ieee80211_sub_if_data *sdata;
struct cfg80211_chan_def chandef = {};
struct cfg80211_chan_def *oper = NULL;
enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_STATIC;
u32 changed = 0;
int power;
u32 offchannel_flag;
if (!local->emulate_chanctx)
return 0;
offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
if (ctx && !WARN_ON(!ctx->def.chan)) {
oper = &ctx->def;
if (ctx->rx_chains_static > 1)
smps_mode = IEEE80211_SMPS_OFF;
else if (ctx->rx_chains_dynamic > 1)
smps_mode = IEEE80211_SMPS_DYNAMIC;
else
smps_mode = IEEE80211_SMPS_STATIC;
}
if (local->scan_chandef.chan) {
chandef = local->scan_chandef;
} else if (local->tmp_channel) {
chandef.chan = local->tmp_channel;
chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
chandef.center_freq1 = chandef.chan->center_freq;
chandef.freq1_offset = chandef.chan->freq_offset;
} else if (oper) {
chandef = *oper;
} else {
chandef = local->dflt_chandef;
}
if (WARN(!cfg80211_chandef_valid(&chandef),
"control:%d.%03d MHz width:%d center: %d.%03d/%d MHz",
chandef.chan ? chandef.chan->center_freq : -1,
chandef.chan ? chandef.chan->freq_offset : 0,
chandef.width, chandef.center_freq1, chandef.freq1_offset,
chandef.center_freq2))
return 0;
if (!oper || !cfg80211_chandef_identical(&chandef, oper))
local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
else
local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
/* force it also for scanning, since drivers might config differently */
if (offchannel_flag || local->scanning ||
!cfg80211_chandef_identical(&local->hw.conf.chandef, &chandef)) {
local->hw.conf.chandef = chandef;
changed |= IEEE80211_CONF_CHANGE_CHANNEL;
}
if (!conf_is_ht(&local->hw.conf)) {
/*
* mac80211.h documents that this is only valid
* when the channel is set to an HT type, and
* that otherwise STATIC is used.
*/
local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
} else if (local->hw.conf.smps_mode != smps_mode) {
local->hw.conf.smps_mode = smps_mode;
changed |= IEEE80211_CONF_CHANGE_SMPS;
}
power = ieee80211_chandef_max_power(&chandef);
rcu_read_lock();
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf))
continue;
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
continue;
if (sdata->vif.bss_conf.txpower == INT_MIN)
continue;
power = min(power, sdata->vif.bss_conf.txpower);
}
rcu_read_unlock();
if (local->hw.conf.power_level != power) {
changed |= IEEE80211_CONF_CHANGE_POWER;
local->hw.conf.power_level = power;
}
return changed;
}
int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
{
int ret = 0;
might_sleep();
WARN_ON(changed & (IEEE80211_CONF_CHANGE_CHANNEL |
IEEE80211_CONF_CHANGE_POWER |
IEEE80211_CONF_CHANGE_SMPS));
if (changed && local->open_count) {
ret = drv_config(local, changed);
/*
* Goal:
* HW reconfiguration should never fail, the driver has told
* us what it can support so it should live up to that promise.
*
* Current status:
* rfkill is not integrated with mac80211 and a
* configuration command can thus fail if hardware rfkill
* is enabled
*
* FIXME: integrate rfkill with mac80211 and then add this
* WARN_ON() back
*
*/
/* WARN_ON(ret); */
}
return ret;
}
/* for scanning, offchannel and chanctx emulation only */
static int _ieee80211_hw_conf_chan(struct ieee80211_local *local,
struct ieee80211_chanctx_conf *ctx)
{
u32 changed;
if (!local->open_count)
return 0;
changed = ieee80211_calc_hw_conf_chan(local, ctx);
if (!changed)
return 0;
return drv_config(local, changed);
}
int ieee80211_hw_conf_chan(struct ieee80211_local *local)
{
struct ieee80211_chanctx *ctx;
ctx = list_first_entry_or_null(&local->chanctx_list,
struct ieee80211_chanctx,
list);
return _ieee80211_hw_conf_chan(local, ctx ? &ctx->conf : NULL);
}
void ieee80211_hw_conf_init(struct ieee80211_local *local)
{
u32 changed = ~(IEEE80211_CONF_CHANGE_CHANNEL |
IEEE80211_CONF_CHANGE_POWER |
IEEE80211_CONF_CHANGE_SMPS);
if (WARN_ON(!local->open_count))
return;
if (local->emulate_chanctx) {
struct ieee80211_chanctx *ctx;
ctx = list_first_entry_or_null(&local->chanctx_list,
struct ieee80211_chanctx,
list);
changed |= ieee80211_calc_hw_conf_chan(local,
ctx ? &ctx->conf : NULL);
}
WARN_ON(drv_config(local, changed));
}
int ieee80211_emulate_add_chanctx(struct ieee80211_hw *hw,
struct ieee80211_chanctx_conf *ctx)
{
struct ieee80211_local *local = hw_to_local(hw);
local->hw.conf.radar_enabled = ctx->radar_enabled;
return _ieee80211_hw_conf_chan(local, ctx);
}
EXPORT_SYMBOL(ieee80211_emulate_add_chanctx);
void ieee80211_emulate_remove_chanctx(struct ieee80211_hw *hw,
struct ieee80211_chanctx_conf *ctx)
{
struct ieee80211_local *local = hw_to_local(hw);
local->hw.conf.radar_enabled = false;
_ieee80211_hw_conf_chan(local, NULL);
}
EXPORT_SYMBOL(ieee80211_emulate_remove_chanctx);
void ieee80211_emulate_change_chanctx(struct ieee80211_hw *hw,
struct ieee80211_chanctx_conf *ctx,
u32 changed)
{
struct ieee80211_local *local = hw_to_local(hw);
local->hw.conf.radar_enabled = ctx->radar_enabled;
_ieee80211_hw_conf_chan(local, ctx);
}
EXPORT_SYMBOL(ieee80211_emulate_change_chanctx);
int ieee80211_emulate_switch_vif_chanctx(struct ieee80211_hw *hw,
struct ieee80211_vif_chanctx_switch *vifs,
int n_vifs,
enum ieee80211_chanctx_switch_mode mode)
{
struct ieee80211_local *local = hw_to_local(hw);
if (n_vifs <= 0)
return -EINVAL;
local->hw.conf.radar_enabled = vifs[0].new_ctx->radar_enabled;
_ieee80211_hw_conf_chan(local, vifs[0].new_ctx);
return 0;
}
EXPORT_SYMBOL(ieee80211_emulate_switch_vif_chanctx);
#define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\
BSS_CHANGED_IDLE |\
BSS_CHANGED_PS |\
BSS_CHANGED_IBSS |\
BSS_CHANGED_ARP_FILTER |\
BSS_CHANGED_SSID |\
BSS_CHANGED_MLD_VALID_LINKS |\
BSS_CHANGED_MLD_TTLM)
void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
u64 changed)
{
struct ieee80211_local *local = sdata->local;
might_sleep();
if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
return;
if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
BSS_CHANGED_BEACON_ENABLED) &&
sdata->vif.type != NL80211_IFTYPE_AP &&
sdata->vif.type != NL80211_IFTYPE_ADHOC &&
sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
sdata->vif.type != NL80211_IFTYPE_OCB))
return;
if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE ||
sdata->vif.type == NL80211_IFTYPE_NAN ||
(sdata->vif.type == NL80211_IFTYPE_MONITOR &&
!sdata->vif.bss_conf.mu_mimo_owner &&
!(changed & BSS_CHANGED_TXPOWER))))
return;
if (!check_sdata_in_driver(sdata))
return;
if (changed & BSS_CHANGED_VIF_CFG_FLAGS) {
u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS;
trace_drv_vif_cfg_changed(local, sdata, changed);
if (local->ops->vif_cfg_changed)
local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch);
}
if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) {
u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS;
/* FIXME: should be for each link */
trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf,
changed);
if (local->ops->link_info_changed)
local->ops->link_info_changed(&local->hw, &sdata->vif,
&sdata->vif.bss_conf, ch);
}
if (local->ops->bss_info_changed)
local->ops->bss_info_changed(&local->hw, &sdata->vif,
&sdata->vif.bss_conf, changed);
trace_drv_return_void(local);
}
void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata,
u64 changed)
{
struct ieee80211_local *local = sdata->local;
WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS);
if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
return;
drv_vif_cfg_changed(local, sdata, changed);
}
void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata,
struct ieee80211_link_data *link,
u64 changed)
{
struct ieee80211_local *local = sdata->local;
WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS);
if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
return;
if (!check_sdata_in_driver(sdata))
return;
drv_link_info_changed(local, sdata, link->conf, link->link_id, changed);
}
u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
{
sdata->vif.bss_conf.use_cts_prot = false;
sdata->vif.bss_conf.use_short_preamble = false;
sdata->vif.bss_conf.use_short_slot = false;
return BSS_CHANGED_ERP_CTS_PROT |
BSS_CHANGED_ERP_PREAMBLE |
BSS_CHANGED_ERP_SLOT;
}
void ieee80211_handle_queued_frames(struct ieee80211_local *local)
{
struct sk_buff *skb;
while ((skb = skb_dequeue(&local->skb_queue)) ||
(skb = skb_dequeue(&local->skb_queue_unreliable))) {
switch (skb->pkt_type) {
case IEEE80211_RX_MSG:
/* Clear skb->pkt_type in order to not confuse kernel
* netstack. */
skb->pkt_type = 0;
ieee80211_rx(&local->hw, skb);
break;
case IEEE80211_TX_STATUS_MSG:
skb->pkt_type = 0;
ieee80211_tx_status_skb(&local->hw, skb);
break;
default:
WARN(1, "mac80211: Packet is of unknown type %d\n",
skb->pkt_type);
dev_kfree_skb(skb);
break;
}
}
}
static void ieee80211_tasklet_handler(struct tasklet_struct *t)
{
struct ieee80211_local *local = from_tasklet(local, t, tasklet);
ieee80211_handle_queued_frames(local);
}
static void ieee80211_restart_work(struct work_struct *work)
{
struct ieee80211_local *local =
container_of(work, struct ieee80211_local, restart_work);
struct ieee80211_sub_if_data *sdata;
int ret;
flush_workqueue(local->workqueue);
rtnl_lock();
/* we might do interface manipulations, so need both */
wiphy_lock(local->hw.wiphy);
wiphy_work_flush(local->hw.wiphy, NULL);
WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
"%s called with hardware scan in progress\n", __func__);
list_for_each_entry(sdata, &local->interfaces, list) {
/*
* XXX: there may be more work for other vif types and even
* for station mode: a good thing would be to run most of
* the iface type's dependent _stop (ieee80211_mg_stop,
* ieee80211_ibss_stop) etc...
* For now, fix only the specific bug that was seen: race
* between csa_connection_drop_work and us.
*/
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
/*
* This worker is scheduled from the iface worker that
* runs on mac80211's workqueue, so we can't be
* scheduling this worker after the cancel right here.
* The exception is ieee80211_chswitch_done.
* Then we can have a race...
*/
wiphy_work_cancel(local->hw.wiphy,
&sdata->u.mgd.csa_connection_drop_work);
if (sdata->vif.bss_conf.csa_active)
ieee80211_sta_connection_lost(sdata,
WLAN_REASON_UNSPECIFIED,
false);
}
wiphy_delayed_work_flush(local->hw.wiphy,
&sdata->dec_tailroom_needed_wk);
}
ieee80211_scan_cancel(local);
/* make sure any new ROC will consider local->in_reconfig */
wiphy_delayed_work_flush(local->hw.wiphy, &local->roc_work);
wiphy_work_flush(local->hw.wiphy, &local->hw_roc_done);
/* wait for all packet processing to be done */
synchronize_net();
ret = ieee80211_reconfig(local);
wiphy_unlock(local->hw.wiphy);
if (ret)
cfg80211_shutdown_all_interfaces(local->hw.wiphy);
rtnl_unlock();
}
void ieee80211_restart_hw(struct ieee80211_hw *hw)
{
struct ieee80211_local *local = hw_to_local(hw);
trace_api_restart_hw(local);
wiphy_info(hw->wiphy,
"Hardware restart was requested\n");
/* use this reason, ieee80211_reconfig will unblock it */
ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
IEEE80211_QUEUE_STOP_REASON_SUSPEND,
false);
/*
* Stop all Rx during the reconfig. We don't want state changes
* or driver callbacks while this is in progress.
*/
local->in_reconfig = true;
barrier();
queue_work(system_freezable_wq, &local->restart_work);
}
EXPORT_SYMBOL(ieee80211_restart_hw);
#ifdef CONFIG_INET
static int ieee80211_ifa_changed(struct notifier_block *nb,
unsigned long data, void *arg)
{
struct in_ifaddr *ifa = arg;
struct ieee80211_local *local =
container_of(nb, struct ieee80211_local,
ifa_notifier);
struct net_device *ndev = ifa->ifa_dev->dev;
struct wireless_dev *wdev = ndev->ieee80211_ptr;
struct in_device *idev;
struct ieee80211_sub_if_data *sdata;
struct ieee80211_vif_cfg *vif_cfg;
struct ieee80211_if_managed *ifmgd;
int c = 0;
/* Make sure it's our interface that got changed */
if (!wdev)
return NOTIFY_DONE;
if (wdev->wiphy != local->hw.wiphy || !wdev->registered)
return NOTIFY_DONE;
sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
vif_cfg = &sdata->vif.cfg;
/* ARP filtering is only supported in managed mode */
if (sdata->vif.type != NL80211_IFTYPE_STATION)
return NOTIFY_DONE;
idev = __in_dev_get_rtnl(sdata->dev);
if (!idev)
return NOTIFY_DONE;
ifmgd = &sdata->u.mgd;
/*
* The nested here is needed to convince lockdep that this is
* all OK. Yes, we lock the wiphy mutex here while we already
* hold the notifier rwsem, that's the normal case. And yes,
* we also acquire the notifier rwsem again when unregistering
* a netdev while we already hold the wiphy mutex, so it does
* look like a typical ABBA deadlock.
*
* However, both of these things happen with the RTNL held
* already. Therefore, they can't actually happen, since the
* lock orders really are ABC and ACB, which is fine due to
* the RTNL (A).
*
* We still need to prevent recursion, which is accomplished
* by the !wdev->registered check above.
*/
mutex_lock_nested(&local->hw.wiphy->mtx, 1);
__acquire(&local->hw.wiphy->mtx);
/* Copy the addresses to the vif config list */
ifa = rtnl_dereference(idev->ifa_list);
while (ifa) {
if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
vif_cfg->arp_addr_list[c] = ifa->ifa_address;
ifa = rtnl_dereference(ifa->ifa_next);
c++;
}
vif_cfg->arp_addr_cnt = c;
/* Configure driver only if associated (which also implies it is up) */
if (ifmgd->associated)
ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER);
wiphy_unlock(local->hw.wiphy);
return NOTIFY_OK;
}
#endif
#if IS_ENABLED(CONFIG_IPV6)
static int ieee80211_ifa6_changed(struct notifier_block *nb,
unsigned long data, void *arg)
{
struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
struct inet6_dev *idev = ifa->idev;
struct net_device *ndev = ifa->idev->dev;
struct ieee80211_local *local =
container_of(nb, struct ieee80211_local, ifa6_notifier);
struct wireless_dev *wdev = ndev->ieee80211_ptr;
struct ieee80211_sub_if_data *sdata;
/* Make sure it's our interface that got changed */
if (!wdev || wdev->wiphy != local->hw.wiphy)
return NOTIFY_DONE;
sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
/*
* For now only support station mode. This is mostly because
* doing AP would have to handle AP_VLAN in some way ...
*/
if (sdata->vif.type != NL80211_IFTYPE_STATION)
return NOTIFY_DONE;
drv_ipv6_addr_change(local, sdata, idev);
return NOTIFY_OK;
}
#endif
/* There isn't a lot of sense in it, but you can transmit anything you like */
static const struct ieee80211_txrx_stypes
ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
[NL80211_IFTYPE_ADHOC] = {
.tx = 0xffff,
.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
BIT(IEEE80211_STYPE_AUTH >> 4) |
BIT(IEEE80211_STYPE_DEAUTH >> 4) |
BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
},
[NL80211_IFTYPE_STATION] = {
.tx = 0xffff,
/*
* To support Pre Association Security Negotiation (PASN) while
* already associated to one AP, allow user space to register to
* Rx authentication frames, so that the user space logic would
* be able to receive/handle authentication frames from a
* different AP as part of PASN.
* It is expected that user space would intelligently register
* for Rx authentication frames, i.e., only when PASN is used
* and configure a match filter only for PASN authentication
* algorithm, as otherwise the MLME functionality of mac80211
* would be broken.
*/
.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
BIT(IEEE80211_STYPE_AUTH >> 4) |
BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
},
[NL80211_IFTYPE_AP] = {
.tx = 0xffff,
.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
BIT(IEEE80211_STYPE_DISASSOC >> 4) |
BIT(IEEE80211_STYPE_AUTH >> 4) |
BIT(IEEE80211_STYPE_DEAUTH >> 4) |
BIT(IEEE80211_STYPE_ACTION >> 4),
},
[NL80211_IFTYPE_AP_VLAN] = {
/* copy AP */
.tx = 0xffff,
.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
BIT(IEEE80211_STYPE_DISASSOC >> 4) |
BIT(IEEE80211_STYPE_AUTH >> 4) |
BIT(IEEE80211_STYPE_DEAUTH >> 4) |
BIT(IEEE80211_STYPE_ACTION >> 4),
},
[NL80211_IFTYPE_P2P_CLIENT] = {
.tx = 0xffff,
.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
},
[NL80211_IFTYPE_P2P_GO] = {
.tx = 0xffff,
.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
BIT(IEEE80211_STYPE_DISASSOC >> 4) |
BIT(IEEE80211_STYPE_AUTH >> 4) |
BIT(IEEE80211_STYPE_DEAUTH >> 4) |
BIT(IEEE80211_STYPE_ACTION >> 4),
},
[NL80211_IFTYPE_MESH_POINT] = {
.tx = 0xffff,
.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
BIT(IEEE80211_STYPE_AUTH >> 4) |
BIT(IEEE80211_STYPE_DEAUTH >> 4),
},
[NL80211_IFTYPE_P2P_DEVICE] = {
.tx = 0xffff,
.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
},
};
static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
.ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
IEEE80211_HT_AMPDU_PARM_DENSITY,
.cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
IEEE80211_HT_CAP_MAX_AMSDU |
IEEE80211_HT_CAP_SGI_20 |
IEEE80211_HT_CAP_SGI_40 |
IEEE80211_HT_CAP_TX_STBC |
IEEE80211_HT_CAP_RX_STBC |
IEEE80211_HT_CAP_LDPC_CODING |
IEEE80211_HT_CAP_40MHZ_INTOLERANT),
.mcs = {
.rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, },
},
};
static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
.vht_cap_info =
cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
IEEE80211_VHT_CAP_SHORT_GI_80 |
IEEE80211_VHT_CAP_SHORT_GI_160 |
IEEE80211_VHT_CAP_RXSTBC_MASK |
IEEE80211_VHT_CAP_TXSTBC |
IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
.supp_mcs = {
.rx_mcs_map = cpu_to_le16(~0),
.tx_mcs_map = cpu_to_le16(~0),
},
};
struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
const struct ieee80211_ops *ops,
const char *requested_name)
{
struct ieee80211_local *local;
int priv_size, i;
struct wiphy *wiphy;
bool emulate_chanctx;
if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
!ops->add_interface || !ops->remove_interface ||
!ops->configure_filter || !ops->wake_tx_queue))
return NULL;
if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
return NULL;
if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed ||
(ops->link_info_changed && ops->bss_info_changed)))
return NULL;
/* check all or no channel context operations exist */
if (ops->add_chanctx == ieee80211_emulate_add_chanctx &&
ops->remove_chanctx == ieee80211_emulate_remove_chanctx &&
ops->change_chanctx == ieee80211_emulate_change_chanctx) {
if (WARN_ON(ops->assign_vif_chanctx ||
ops->unassign_vif_chanctx))
return NULL;
emulate_chanctx = true;
} else {
if (WARN_ON(ops->add_chanctx == ieee80211_emulate_add_chanctx ||
ops->remove_chanctx == ieee80211_emulate_remove_chanctx ||
ops->change_chanctx == ieee80211_emulate_change_chanctx))
return NULL;
if (WARN_ON(!ops->add_chanctx ||
!ops->remove_chanctx ||
!ops->change_chanctx ||
!ops->assign_vif_chanctx ||
!ops->unassign_vif_chanctx))
return NULL;
emulate_chanctx = false;
}
/* Ensure 32-byte alignment of our private data and hw private data.
* We use the wiphy priv data for both our ieee80211_local and for
* the driver's private data
*
* In memory it'll be like this:
*
* +-------------------------+
* | struct wiphy |
* +-------------------------+
* | struct ieee80211_local |
* +-------------------------+
* | driver's private data |
* +-------------------------+
*
*/
priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
if (!wiphy)
return NULL;
wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
wiphy->privid = mac80211_wiphy_privid;
wiphy->flags |= WIPHY_FLAG_NETNS_OK |
WIPHY_FLAG_4ADDR_AP |
WIPHY_FLAG_4ADDR_STATION |
WIPHY_FLAG_REPORTS_OBSS |
WIPHY_FLAG_OFFCHAN_TX;
if (emulate_chanctx || ops->remain_on_channel)
wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
NL80211_FEATURE_SAE |
NL80211_FEATURE_HT_IBSS |
NL80211_FEATURE_VIF_TXPOWER |
NL80211_FEATURE_MAC_ON_CREATE |
NL80211_FEATURE_USERSPACE_MPM |
NL80211_FEATURE_FULL_AP_CLIENT_STATE;
wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
wiphy_ext_feature_set(wiphy,
NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
wiphy_ext_feature_set(wiphy,
NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
wiphy_ext_feature_set(wiphy,
NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
wiphy_ext_feature_set(wiphy,
NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
wiphy_ext_feature_set(wiphy,
NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE);
if (!ops->hw_scan) {
wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
NL80211_FEATURE_AP_SCAN;
/*
* if the driver behaves correctly using the probe request
* (template) from mac80211, then both of these should be
* supported even with hw scan - but let drivers opt in.
*/
wiphy_ext_feature_set(wiphy,
NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
wiphy_ext_feature_set(wiphy,
NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
}
if (!ops->set_key) {
wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
wiphy_ext_feature_set(wiphy,
NL80211_EXT_FEATURE_SPP_AMSDU_SUPPORT);
}
wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
local = wiphy_priv(wiphy);
if (sta_info_init(local))
goto err_free;
local->hw.wiphy = wiphy;
local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
local->ops = ops;
local->emulate_chanctx = emulate_chanctx;
if (emulate_chanctx)
ieee80211_hw_set(&local->hw, CHANCTX_STA_CSA);
/*
* We need a bit of data queued to build aggregates properly, so
* instruct the TCP stack to allow more than a single ms of data
* to be queued in the stack. The value is a bit-shift of 1
* second, so 7 is ~8ms of queued data. Only affects local TCP
* sockets.
* This is the default, anyhow - drivers may need to override it
* for local reasons (longer buffers, longer completion time, or
* similar).
*/
local->hw.tx_sk_pacing_shift = 7;
/* set up some defaults */
local->hw.queues = 1;
local->hw.max_rates = 1;
local->hw.max_report_rates = 0;
local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
IEEE80211_RADIOTAP_MCS_HAVE_GI |
IEEE80211_RADIOTAP_MCS_HAVE_BW;
local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
wiphy->extended_capabilities = local->ext_capa;
wiphy->extended_capabilities_mask = local->ext_capa;
wiphy->extended_capabilities_len =
ARRAY_SIZE(local->ext_capa);
INIT_LIST_HEAD(&local->interfaces);
INIT_LIST_HEAD(&local->mon_list);
__hw_addr_init(&local->mc_list);
mutex_init(&local->iflist_mtx);
spin_lock_init(&local->filter_lock);
spin_lock_init(&local->rx_path_lock);
spin_lock_init(&local->queue_stop_reason_lock);
for (i = 0; i < IEEE80211_NUM_ACS; i++) {
INIT_LIST_HEAD(&local->active_txqs[i]);
spin_lock_init(&local->active_txq_lock[i]);
local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
local->aql_txq_limit_high[i] =
IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
atomic_set(&local->aql_ac_pending_airtime[i], 0);
}
local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
local->aql_threshold = IEEE80211_AQL_THRESHOLD;
atomic_set(&local->aql_total_pending_airtime, 0);
spin_lock_init(&local->handle_wake_tx_queue_lock);
INIT_LIST_HEAD(&local->chanctx_list);
wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work);
INIT_WORK(&local->restart_work, ieee80211_restart_work);
wiphy_work_init(&local->radar_detected_work,
ieee80211_dfs_radar_detected_work);
wiphy_work_init(&local->reconfig_filter, ieee80211_reconfig_filter);
wiphy_work_init(&local->dynamic_ps_enable_work,
ieee80211_dynamic_ps_enable_work);
wiphy_work_init(&local->dynamic_ps_disable_work,
ieee80211_dynamic_ps_disable_work);
timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
wiphy_work_init(&local->sched_scan_stopped_work,
ieee80211_sched_scan_stopped_work);
spin_lock_init(&local->ack_status_lock);
idr_init(&local->ack_status_frames);
for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
skb_queue_head_init(&local->pending[i]);
atomic_set(&local->agg_queue_stop[i], 0);
}
tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
skb_queue_head_init(&local->skb_queue);
skb_queue_head_init(&local->skb_queue_unreliable);
ieee80211_alloc_led_names(local);
ieee80211_roc_setup(local);
local->hw.radiotap_timestamp.units_pos = -1;
local->hw.radiotap_timestamp.accuracy = -1;
return &local->hw;
err_free:
wiphy_free(wiphy);
return NULL;
}
EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
{
bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
int r = 0, w = 0;
u32 *suites;
static const u32 cipher_suites[] = {
/* keep WEP first, it may be removed below */
WLAN_CIPHER_SUITE_WEP40,
WLAN_CIPHER_SUITE_WEP104,
WLAN_CIPHER_SUITE_TKIP,
WLAN_CIPHER_SUITE_CCMP,
WLAN_CIPHER_SUITE_CCMP_256,
WLAN_CIPHER_SUITE_GCMP,
WLAN_CIPHER_SUITE_GCMP_256,
/* keep last -- depends on hw flags! */
WLAN_CIPHER_SUITE_AES_CMAC,
WLAN_CIPHER_SUITE_BIP_CMAC_256,
WLAN_CIPHER_SUITE_BIP_GMAC_128,
WLAN_CIPHER_SUITE_BIP_GMAC_256,
};
if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
local->hw.wiphy->cipher_suites) {
/* If the driver advertises, or doesn't support SW crypto,
* we only need to remove WEP if necessary.
*/
if (have_wep)
return 0;
/* well if it has _no_ ciphers ... fine */
if (!local->hw.wiphy->n_cipher_suites)
return 0;
/* Driver provides cipher suites, but we need to exclude WEP */
suites = kmemdup(local->hw.wiphy->cipher_suites,
sizeof(u32) * local->hw.wiphy->n_cipher_suites,
GFP_KERNEL);
if (!suites)
return -ENOMEM;
for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
u32 suite = local->hw.wiphy->cipher_suites[r];
if (suite == WLAN_CIPHER_SUITE_WEP40 ||
suite == WLAN_CIPHER_SUITE_WEP104)
continue;
suites[w++] = suite;
}
} else {
/* assign the (software supported and perhaps offloaded)
* cipher suites
*/
local->hw.wiphy->cipher_suites = cipher_suites;
local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
if (!have_mfp)
local->hw.wiphy->n_cipher_suites -= 4;
if (!have_wep) {
local->hw.wiphy->cipher_suites += 2;
local->hw.wiphy->n_cipher_suites -= 2;
}
/* not dynamically allocated, so just return */
return 0;
}
local->hw.wiphy->cipher_suites = suites;
local->hw.wiphy->n_cipher_suites = w;
local->wiphy_ciphers_allocated = true;
return 0;
}
int ieee80211_register_hw(struct ieee80211_hw *hw)
{
struct ieee80211_local *local = hw_to_local(hw);
int result, i;
enum nl80211_band band;
int channels, max_bitrates;
bool supp_ht, supp_vht, supp_he, supp_eht;
struct cfg80211_chan_def dflt_chandef = {};
if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
(local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
local->hw.offchannel_tx_hw_queue >= local->hw.queues))
return -EINVAL;
if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
(!local->ops->tdls_channel_switch ||
!local->ops->tdls_cancel_channel_switch ||
!local->ops->tdls_recv_channel_switch))
return -EOPNOTSUPP;
if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
!local->ops->set_frag_threshold))
return -EINVAL;
if (WARN_ON(local->hw.wiphy->interface_modes &
BIT(NL80211_IFTYPE_NAN) &&
(!local->ops->start_nan || !local->ops->stop_nan)))
return -EINVAL;
if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) {
/*
* For drivers capable of doing MLO, assume modern driver
* or firmware facilities, so software doesn't have to do
* as much, e.g. monitoring beacons would be hard if we
* might not even know which link is active at which time.
*/
if (WARN_ON(local->emulate_chanctx))
return -EINVAL;
if (WARN_ON(!local->ops->link_info_changed))
return -EINVAL;
if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL)))
return -EINVAL;
if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION)))
return -EINVAL;
if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING)))
return -EINVAL;
if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) &&
(!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) ||
ieee80211_hw_check(hw, PS_NULLFUNC_STACK))))
return -EINVAL;
if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE)))
return -EINVAL;
if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR)))
return -EINVAL;
if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC)))
return -EINVAL;
if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY)))
return -EINVAL;
if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS)))
return -EINVAL;
if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP)))
return -EINVAL;
}
#ifdef CONFIG_PM
if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
return -EINVAL;
#endif
if (local->emulate_chanctx) {
for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
const struct ieee80211_iface_combination *comb;
comb = &local->hw.wiphy->iface_combinations[i];
if (comb->num_different_channels > 1)
return -EINVAL;
}
} else {
/* DFS is not supported with multi-channel combinations yet */
for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
const struct ieee80211_iface_combination *comb;
comb = &local->hw.wiphy->iface_combinations[i];
if (comb->radar_detect_widths &&
comb->num_different_channels > 1)
return -EINVAL;
}
}
/* Only HW csum features are currently compatible with mac80211 */
if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
return -EINVAL;
if (hw->max_report_rates == 0)
hw->max_report_rates = hw->max_rates;
local->rx_chains = 1;
/*
* generic code guarantees at least one band,
* set this very early because much code assumes
* that hw.conf.channel is assigned
*/
channels = 0;
max_bitrates = 0;
supp_ht = false;
supp_vht = false;
supp_he = false;
supp_eht = false;
for (band = 0; band < NUM_NL80211_BANDS; band++) {
const struct ieee80211_sband_iftype_data *iftd;
struct ieee80211_supported_band *sband;
sband = local->hw.wiphy->bands[band];
if (!sband)
continue;
if (!dflt_chandef.chan) {
/*
* Assign the first enabled channel to dflt_chandef
* from the list of channels
*/
for (i = 0; i < sband->n_channels; i++)
if (!(sband->channels[i].flags &
IEEE80211_CHAN_DISABLED))
break;
/* if none found then use the first anyway */
if (i == sband->n_channels)
i = 0;
cfg80211_chandef_create(&dflt_chandef,
&sband->channels[i],
NL80211_CHAN_NO_HT);
/* init channel we're on */
local->monitor_chanreq.oper = dflt_chandef;
if (local->emulate_chanctx) {
local->dflt_chandef = dflt_chandef;
local->hw.conf.chandef = dflt_chandef;
}
}
channels += sband->n_channels;
/*
* Due to the way the aggregation code handles this and it
* being an HT capability, we can't really support delayed
* BA in MLO (yet).
*/
if (WARN_ON(sband->ht_cap.ht_supported &&
(sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) &&
hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
return -EINVAL;
if (max_bitrates < sband->n_bitrates)
max_bitrates = sband->n_bitrates;
supp_ht = supp_ht || sband->ht_cap.ht_supported;
supp_vht = supp_vht || sband->vht_cap.vht_supported;
for_each_sband_iftype_data(sband, i, iftd) {
u8 he_40_mhz_cap;
supp_he = supp_he || iftd->he_cap.has_he;
supp_eht = supp_eht || iftd->eht_cap.has_eht;
if (band == NL80211_BAND_2GHZ)
he_40_mhz_cap =
IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G;
else
he_40_mhz_cap =
IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G;
/* currently no support for HE client where HT has 40 MHz but not HT */
if (iftd->he_cap.has_he &&
iftd->types_mask & (BIT(NL80211_IFTYPE_STATION) |
BIT(NL80211_IFTYPE_P2P_CLIENT)) &&
sband->ht_cap.ht_supported &&
sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
!(iftd->he_cap.he_cap_elem.phy_cap_info[0] & he_40_mhz_cap))
return -EINVAL;
}
/* HT, VHT, HE require QoS, thus >= 4 queues */
if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
(supp_ht || supp_vht || supp_he)))
return -EINVAL;
/* EHT requires HE support */
if (WARN_ON(supp_eht && !supp_he))
return -EINVAL;
if (!sband->ht_cap.ht_supported)
continue;
/* TODO: consider VHT for RX chains, hopefully it's the same */
local->rx_chains =
max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
local->rx_chains);
/* no need to mask, SM_PS_DISABLED has all bits set */
sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
IEEE80211_HT_CAP_SM_PS_SHIFT;
}
/* if low-level driver supports AP, we also support VLAN.
* drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
* based on their support to transmit SW encrypted packets.
*/
if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
!ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
}
/* mac80211 always supports monitor */
hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
/* mac80211 doesn't support more than one IBSS interface right now */
for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
const struct ieee80211_iface_combination *c;
int j;
c = &hw->wiphy->iface_combinations[i];
for (j = 0; j < c->n_limits; j++)
if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
c->limits[j].max > 1)
return -EINVAL;
}
local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
sizeof(void *) * channels, GFP_KERNEL);
if (!local->int_scan_req)
return -ENOMEM;
eth_broadcast_addr(local->int_scan_req->bssid);
for (band = 0; band < NUM_NL80211_BANDS; band++) {
if (!local->hw.wiphy->bands[band])
continue;
local->int_scan_req->rates[band] = (u32) -1;
}
#ifndef CONFIG_MAC80211_MESH
/* mesh depends on Kconfig, but drivers should set it if they want */
local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
#endif
/* if the underlying driver supports mesh, mac80211 will (at least)
* provide routing of mesh authentication frames to userspace */
if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
/* mac80211 supports control port protocol changing */
local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
} else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
if (hw->max_signal <= 0) {
result = -EINVAL;
goto fail_workqueue;
}
}
/* Mac80211 and therefore all drivers using SW crypto only
* are able to handle PTK rekeys and Extended Key ID.
*/
if (!local->ops->set_key) {
wiphy_ext_feature_set(local->hw.wiphy,
NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
wiphy_ext_feature_set(local->hw.wiphy,
NL80211_EXT_FEATURE_EXT_KEY_ID);
}
if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
wiphy_ext_feature_set(local->hw.wiphy,
NL80211_EXT_FEATURE_DEL_IBSS_STA);
/*
* Calculate scan IE length -- we need this to alloc
* memory and to subtract from the driver limit. It
* includes the DS Params, (extended) supported rates, and HT
* information -- SSID is the driver's responsibility.
*/
local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
3 /* DS Params */;
if (supp_ht)
local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
if (supp_vht)
local->scan_ies_len +=
2 + sizeof(struct ieee80211_vht_cap);
/*
* HE cap element is variable in size - set len to allow max size */
if (supp_he) {
local->scan_ies_len +=
3 + sizeof(struct ieee80211_he_cap_elem) +
sizeof(struct ieee80211_he_mcs_nss_supp) +
IEEE80211_HE_PPE_THRES_MAX_LEN;
if (supp_eht)
local->scan_ies_len +=
3 + sizeof(struct ieee80211_eht_cap_elem) +
sizeof(struct ieee80211_eht_mcs_nss_supp) +
IEEE80211_EHT_PPE_THRES_MAX_LEN;
}
if (!local->ops->hw_scan) {
/* For hw_scan, driver needs to set these up. */
local->hw.wiphy->max_scan_ssids = 4;
local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
}
/*
* If the driver supports any scan IEs, then assume the
* limit includes the IEs mac80211 will add, otherwise
* leave it at zero and let the driver sort it out; we
* still pass our IEs to the driver but userspace will
* not be allowed to in that case.
*/
if (local->hw.wiphy->max_scan_ie_len)
local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
result = ieee80211_init_cipher_suites(local);
if (result < 0)
goto fail_workqueue;
if (!local->ops->remain_on_channel)
local->hw.wiphy->max_remain_on_channel_duration = 5000;
/* mac80211 based drivers don't support internal TDLS setup */
if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
/* mac80211 supports eCSA, if the driver supports STA CSA at all */
if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
/* mac80211 supports multi BSSID, if the driver supports it */
if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
local->hw.wiphy->support_mbssid = true;
if (ieee80211_hw_check(&local->hw,
SUPPORTS_ONLY_HE_MULTI_BSSID))
local->hw.wiphy->support_only_he_mbssid = true;
else
local->ext_capa[2] |=
WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
}
local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
/*
* We use the number of queues for feature tests (QoS, HT) internally
* so restrict them appropriately.
*/
if (hw->queues > IEEE80211_MAX_QUEUES)
hw->queues = IEEE80211_MAX_QUEUES;
local->workqueue =
alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
if (!local->workqueue) {
result = -ENOMEM;
goto fail_workqueue;
}
/*
* The hardware needs headroom for sending the frame,
* and we need some headroom for passing the frame to monitor
* interfaces, but never both at the same time.
*/
local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
IEEE80211_TX_STATUS_HEADROOM);
/*
* if the driver doesn't specify a max listen interval we
* use 5 which should be a safe default
*/
if (local->hw.max_listen_interval == 0)
local->hw.max_listen_interval = 5;
local->hw.conf.listen_interval = local->hw.max_listen_interval;
local->dynamic_ps_forced_timeout = -1;
if (!local->hw.max_nan_de_entries)
local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
if (!local->hw.weight_multiplier)
local->hw.weight_multiplier = 1;
ieee80211_wep_init(local);
local->hw.conf.flags = IEEE80211_CONF_IDLE;
ieee80211_led_init(local);
result = ieee80211_txq_setup_flows(local);
if (result)
goto fail_flows;
rtnl_lock();
result = ieee80211_init_rate_ctrl_alg(local,
hw->rate_control_algorithm);
rtnl_unlock();
if (result < 0) {
wiphy_debug(local->hw.wiphy,
"Failed to initialize rate control algorithm\n");
goto fail_rate;
}
if (local->rate_ctrl) {
clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
}
/*
* If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
* or have it when we don't, copy the sband structure and set/clear it.
* This is necessary because rate scaling algorithms could be switched
* and have different support values.
* Print a message so that in the common case the reallocation can be
* avoided.
*/
BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
for (band = 0; band < NUM_NL80211_BANDS; band++) {
struct ieee80211_supported_band *sband;
bool local_cap, ie_cap;
local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
sband = local->hw.wiphy->bands[band];
if (!sband || !sband->vht_cap.vht_supported)
continue;
ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
if (local_cap == ie_cap)
continue;
sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
if (!sband) {
result = -ENOMEM;
goto fail_rate;
}
wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
band);
sband->vht_cap.vht_mcs.tx_highest ^=
cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
local->hw.wiphy->bands[band] = sband;
local->sband_allocated |= BIT(band);
}
result = wiphy_register(local->hw.wiphy);
if (result < 0)
goto fail_wiphy_register;
debugfs_hw_add(local);
rate_control_add_debugfs(local);
ieee80211_check_wbrf_support(local);
rtnl_lock();
wiphy_lock(hw->wiphy);
/* add one default STA interface if supported */
if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
!ieee80211_hw_check(hw, NO_AUTO_VIF)) {
struct vif_params params = {0};
result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
NL80211_IFTYPE_STATION, &params);
if (result)
wiphy_warn(local->hw.wiphy,
"Failed to add default virtual iface\n");
}
wiphy_unlock(hw->wiphy);
rtnl_unlock();
#ifdef CONFIG_INET
local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
result = register_inetaddr_notifier(&local->ifa_notifier);
if (result)
goto fail_ifa;
#endif
#if IS_ENABLED(CONFIG_IPV6)
local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
result = register_inet6addr_notifier(&local->ifa6_notifier);
if (result)
goto fail_ifa6;
#endif
return 0;
#if IS_ENABLED(CONFIG_IPV6)
fail_ifa6:
#ifdef CONFIG_INET
unregister_inetaddr_notifier(&local->ifa_notifier);
#endif
#endif
#if defined(CONFIG_INET) || defined(CONFIG_IPV6)
fail_ifa:
#endif
wiphy_unregister(local->hw.wiphy);
fail_wiphy_register:
rtnl_lock();
rate_control_deinitialize(local);
ieee80211_remove_interfaces(local);
rtnl_unlock();
fail_rate:
ieee80211_txq_teardown_flows(local);
fail_flows:
ieee80211_led_exit(local);
destroy_workqueue(local->workqueue);
fail_workqueue:
if (local->wiphy_ciphers_allocated) {
kfree(local->hw.wiphy->cipher_suites);
local->wiphy_ciphers_allocated = false;
}
kfree(local->int_scan_req);
return result;
}
EXPORT_SYMBOL(ieee80211_register_hw);
void ieee80211_unregister_hw(struct ieee80211_hw *hw)
{
struct ieee80211_local *local = hw_to_local(hw);
tasklet_kill(&local->tx_pending_tasklet);
tasklet_kill(&local->tasklet);
#ifdef CONFIG_INET
unregister_inetaddr_notifier(&local->ifa_notifier);
#endif
#if IS_ENABLED(CONFIG_IPV6)
unregister_inet6addr_notifier(&local->ifa6_notifier);
#endif
rtnl_lock();
/*
* At this point, interface list manipulations are fine
* because the driver cannot be handing us frames any
* more and the tasklet is killed.
*/
ieee80211_remove_interfaces(local);
ieee80211_txq_teardown_flows(local);
wiphy_lock(local->hw.wiphy);
wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work);
wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter);
wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work);
wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work);
wiphy_unlock(local->hw.wiphy);
rtnl_unlock();
cancel_work_sync(&local->restart_work);
ieee80211_clear_tx_pending(local);
rate_control_deinitialize(local);
if (skb_queue_len(&local->skb_queue) ||
skb_queue_len(&local->skb_queue_unreliable))
wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
skb_queue_purge(&local->skb_queue);
skb_queue_purge(&local->skb_queue_unreliable);
wiphy_unregister(local->hw.wiphy);
destroy_workqueue(local->workqueue);
ieee80211_led_exit(local);
kfree(local->int_scan_req);
}
EXPORT_SYMBOL(ieee80211_unregister_hw);
static int ieee80211_free_ack_frame(int id, void *p, void *data)
{
WARN_ONCE(1, "Have pending ack frames!\n");
kfree_skb(p);
return 0;
}
void ieee80211_free_hw(struct ieee80211_hw *hw)
{
struct ieee80211_local *local = hw_to_local(hw);
enum nl80211_band band;
mutex_destroy(&local->iflist_mtx);
if (local->wiphy_ciphers_allocated) {
kfree(local->hw.wiphy->cipher_suites);
local->wiphy_ciphers_allocated = false;
}
idr_for_each(&local->ack_status_frames,
ieee80211_free_ack_frame, NULL);
idr_destroy(&local->ack_status_frames);
sta_info_stop(local);
ieee80211_free_led_names(local);
for (band = 0; band < NUM_NL80211_BANDS; band++) {
if (!(local->sband_allocated & BIT(band)))
continue;
kfree(local->hw.wiphy->bands[band]);
}
wiphy_free(local->hw.wiphy);
}
EXPORT_SYMBOL(ieee80211_free_hw);
static const char * const drop_reasons_monitor[] = {
#define V(x) #x,
[0] = "RX_DROP_MONITOR",
MAC80211_DROP_REASONS_MONITOR(V)
};
static struct drop_reason_list drop_reason_list_monitor = {
.reasons = drop_reasons_monitor,
.n_reasons = ARRAY_SIZE(drop_reasons_monitor),
};
static const char * const drop_reasons_unusable[] = {
[0] = "RX_DROP_UNUSABLE",
MAC80211_DROP_REASONS_UNUSABLE(V)
#undef V
};
static struct drop_reason_list drop_reason_list_unusable = {
.reasons = drop_reasons_unusable,
.n_reasons = ARRAY_SIZE(drop_reasons_unusable),
};
static int __init ieee80211_init(void)
{
struct sk_buff *skb;
int ret;
BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
ret = rc80211_minstrel_init();
if (ret)
return ret;
ret = ieee80211_iface_init();
if (ret)
goto err_netdev;
drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR,
&drop_reason_list_monitor);
drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE,
&drop_reason_list_unusable);
return 0;
err_netdev:
rc80211_minstrel_exit();
return ret;
}
static void __exit ieee80211_exit(void)
{
rc80211_minstrel_exit();
ieee80211s_stop();
ieee80211_iface_exit();
drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR);
drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE);
rcu_barrier();
}
subsys_initcall(ieee80211_init);
module_exit(ieee80211_exit);
MODULE_DESCRIPTION("IEEE 802.11 subsystem");
MODULE_LICENSE("GPL");
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