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-rw-r--r--net/mac80211/scan.c220
1 files changed, 79 insertions, 141 deletions
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 68ec2124c3..fca3f67ac0 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -9,7 +9,7 @@
* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
* Copyright 2013-2015 Intel Mobile Communications GmbH
* Copyright 2016-2017 Intel Deutschland GmbH
- * Copyright (C) 2018-2023 Intel Corporation
+ * Copyright (C) 2018-2024 Intel Corporation
*/
#include <linux/if_arp.h>
@@ -187,12 +187,6 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC))
bss_meta.signal = (rx_status->signal * 100) / local->hw.max_signal;
- bss_meta.scan_width = NL80211_BSS_CHAN_WIDTH_20;
- if (rx_status->bw == RATE_INFO_BW_5)
- bss_meta.scan_width = NL80211_BSS_CHAN_WIDTH_5;
- else if (rx_status->bw == RATE_INFO_BW_10)
- bss_meta.scan_width = NL80211_BSS_CHAN_WIDTH_10;
-
bss_meta.chan = channel;
rcu_read_lock();
@@ -222,14 +216,18 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
}
static bool ieee80211_scan_accept_presp(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_channel *channel,
u32 scan_flags, const u8 *da)
{
if (!sdata)
return false;
- /* accept broadcast for OCE */
- if (scan_flags & NL80211_SCAN_FLAG_ACCEPT_BCAST_PROBE_RESP &&
- is_broadcast_ether_addr(da))
+
+ /* accept broadcast on 6 GHz and for OCE */
+ if (is_broadcast_ether_addr(da) &&
+ (channel->band == NL80211_BAND_6GHZ ||
+ scan_flags & NL80211_SCAN_FLAG_ACCEPT_BCAST_PROBE_RESP))
return true;
+
if (scan_flags & NL80211_SCAN_FLAG_RANDOM_ADDR)
return true;
return ether_addr_equal(da, sdata->vif.addr);
@@ -278,6 +276,12 @@ void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb)
wiphy_delayed_work_queue(local->hw.wiphy, &local->scan_work, 0);
}
+ channel = ieee80211_get_channel_khz(local->hw.wiphy,
+ ieee80211_rx_status_to_khz(rx_status));
+
+ if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
+ return;
+
if (ieee80211_is_probe_resp(mgmt->frame_control)) {
struct cfg80211_scan_request *scan_req;
struct cfg80211_sched_scan_request *sched_scan_req;
@@ -295,19 +299,15 @@ void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb)
/* ignore ProbeResp to foreign address or non-bcast (OCE)
* unless scanning with randomised address
*/
- if (!ieee80211_scan_accept_presp(sdata1, scan_req_flags,
+ if (!ieee80211_scan_accept_presp(sdata1, channel,
+ scan_req_flags,
mgmt->da) &&
- !ieee80211_scan_accept_presp(sdata2, sched_scan_req_flags,
+ !ieee80211_scan_accept_presp(sdata2, channel,
+ sched_scan_req_flags,
mgmt->da))
return;
}
- channel = ieee80211_get_channel_khz(local->hw.wiphy,
- ieee80211_rx_status_to_khz(rx_status));
-
- if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
- return;
-
bss = ieee80211_bss_info_update(local, rx_status,
mgmt, skb->len,
channel);
@@ -315,22 +315,11 @@ void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb)
ieee80211_rx_bss_put(local, bss);
}
-static void
-ieee80211_prepare_scan_chandef(struct cfg80211_chan_def *chandef,
- enum nl80211_bss_scan_width scan_width)
+static void ieee80211_prepare_scan_chandef(struct cfg80211_chan_def *chandef)
{
memset(chandef, 0, sizeof(*chandef));
- switch (scan_width) {
- case NL80211_BSS_CHAN_WIDTH_5:
- chandef->width = NL80211_CHAN_WIDTH_5;
- break;
- case NL80211_BSS_CHAN_WIDTH_10:
- chandef->width = NL80211_CHAN_WIDTH_10;
- break;
- default:
- chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
- break;
- }
+
+ chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
}
/* return false if no more work */
@@ -344,7 +333,7 @@ static bool ieee80211_prep_hw_scan(struct ieee80211_sub_if_data *sdata)
u32 flags = 0;
req = rcu_dereference_protected(local->scan_req,
- lockdep_is_held(&local->mtx));
+ lockdep_is_held(&local->hw.wiphy->mtx));
if (test_bit(SCAN_HW_CANCELLED, &local->scanning))
return false;
@@ -378,7 +367,7 @@ static bool ieee80211_prep_hw_scan(struct ieee80211_sub_if_data *sdata)
}
local->hw_scan_req->req.n_channels = n_chans;
- ieee80211_prepare_scan_chandef(&chandef, req->scan_width);
+ ieee80211_prepare_scan_chandef(&chandef);
if (req->flags & NL80211_SCAN_FLAG_MIN_PREQ_CONTENT)
flags |= IEEE80211_PROBE_FLAG_MIN_CONTENT;
@@ -409,7 +398,7 @@ static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted)
struct ieee80211_sub_if_data *scan_sdata;
struct ieee80211_sub_if_data *sdata;
- lockdep_assert_held(&local->mtx);
+ lockdep_assert_wiphy(local->hw.wiphy);
/*
* It's ok to abort a not-yet-running scan (that
@@ -424,7 +413,7 @@ static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted)
return;
scan_sdata = rcu_dereference_protected(local->scan_sdata,
- lockdep_is_held(&local->mtx));
+ lockdep_is_held(&local->hw.wiphy->mtx));
if (hw_scan && !aborted &&
!ieee80211_hw_check(&local->hw, SINGLE_SCAN_ON_ALL_BANDS) &&
@@ -433,7 +422,7 @@ static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted)
rc = drv_hw_scan(local,
rcu_dereference_protected(local->scan_sdata,
- lockdep_is_held(&local->mtx)),
+ lockdep_is_held(&local->hw.wiphy->mtx)),
local->hw_scan_req);
if (rc == 0)
@@ -450,7 +439,7 @@ static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted)
local->hw_scan_req = NULL;
scan_req = rcu_dereference_protected(local->scan_req,
- lockdep_is_held(&local->mtx));
+ lockdep_is_held(&local->hw.wiphy->mtx));
RCU_INIT_POINTER(local->scan_req, NULL);
RCU_INIT_POINTER(local->scan_sdata, NULL);
@@ -555,20 +544,18 @@ static bool __ieee80211_can_leave_ch(struct ieee80211_sub_if_data *sdata)
struct ieee80211_local *local = sdata->local;
struct ieee80211_sub_if_data *sdata_iter;
+ lockdep_assert_wiphy(local->hw.wiphy);
+
if (!ieee80211_is_radar_required(local))
return true;
if (!regulatory_pre_cac_allowed(local->hw.wiphy))
return false;
- mutex_lock(&local->iflist_mtx);
list_for_each_entry(sdata_iter, &local->interfaces, list) {
- if (sdata_iter->wdev.cac_started) {
- mutex_unlock(&local->iflist_mtx);
+ if (sdata_iter->wdev.cac_started)
return false;
- }
}
- mutex_unlock(&local->iflist_mtx);
return true;
}
@@ -591,7 +578,7 @@ static bool ieee80211_can_scan(struct ieee80211_local *local,
void ieee80211_run_deferred_scan(struct ieee80211_local *local)
{
- lockdep_assert_held(&local->mtx);
+ lockdep_assert_wiphy(local->hw.wiphy);
if (!local->scan_req || local->scanning)
return;
@@ -599,7 +586,7 @@ void ieee80211_run_deferred_scan(struct ieee80211_local *local)
if (!ieee80211_can_scan(local,
rcu_dereference_protected(
local->scan_sdata,
- lockdep_is_held(&local->mtx))))
+ lockdep_is_held(&local->hw.wiphy->mtx))))
return;
wiphy_delayed_work_queue(local->hw.wiphy, &local->scan_work,
@@ -644,7 +631,7 @@ static void ieee80211_scan_state_send_probe(struct ieee80211_local *local,
u32 flags = 0, tx_flags;
scan_req = rcu_dereference_protected(local->scan_req,
- lockdep_is_held(&local->mtx));
+ lockdep_is_held(&local->hw.wiphy->mtx));
tx_flags = IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
if (scan_req->no_cck)
@@ -655,7 +642,7 @@ static void ieee80211_scan_state_send_probe(struct ieee80211_local *local,
flags |= IEEE80211_PROBE_FLAG_RANDOM_SN;
sdata = rcu_dereference_protected(local->scan_sdata,
- lockdep_is_held(&local->mtx));
+ lockdep_is_held(&local->hw.wiphy->mtx));
for (i = 0; i < scan_req->n_ssids; i++)
ieee80211_send_scan_probe_req(
@@ -680,7 +667,7 @@ static int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata,
bool hw_scan = local->ops->hw_scan;
int rc;
- lockdep_assert_held(&local->mtx);
+ lockdep_assert_wiphy(local->hw.wiphy);
if (local->scan_req)
return -EBUSY;
@@ -860,12 +847,13 @@ static void ieee80211_scan_state_decision(struct ieee80211_local *local,
enum mac80211_scan_state next_scan_state;
struct cfg80211_scan_request *scan_req;
+ lockdep_assert_wiphy(local->hw.wiphy);
+
/*
* check if at least one STA interface is associated,
* check if at least one STA interface has pending tx frames
* and grab the lowest used beacon interval
*/
- mutex_lock(&local->iflist_mtx);
list_for_each_entry(sdata, &local->interfaces, list) {
if (!ieee80211_sdata_running(sdata))
continue;
@@ -881,10 +869,9 @@ static void ieee80211_scan_state_decision(struct ieee80211_local *local,
}
}
}
- mutex_unlock(&local->iflist_mtx);
scan_req = rcu_dereference_protected(local->scan_req,
- lockdep_is_held(&local->mtx));
+ lockdep_is_held(&local->hw.wiphy->mtx));
next_chan = scan_req->channels[local->scan_channel_idx];
@@ -921,11 +908,10 @@ static void ieee80211_scan_state_set_channel(struct ieee80211_local *local,
{
int skip;
struct ieee80211_channel *chan;
- enum nl80211_bss_scan_width oper_scan_width;
struct cfg80211_scan_request *scan_req;
scan_req = rcu_dereference_protected(local->scan_req,
- lockdep_is_held(&local->mtx));
+ lockdep_is_held(&local->hw.wiphy->mtx));
skip = 0;
chan = scan_req->channels[local->scan_channel_idx];
@@ -935,42 +921,21 @@ static void ieee80211_scan_state_set_channel(struct ieee80211_local *local,
local->scan_chandef.freq1_offset = chan->freq_offset;
local->scan_chandef.center_freq2 = 0;
- /* For scanning on the S1G band, ignore scan_width (which is constant
- * across all channels) for now since channel width is specific to each
- * channel. Detect the required channel width here and likely revisit
- * later. Maybe scan_width could be used to build the channel scan list?
+ /* For scanning on the S1G band, detect the channel width according to
+ * the channel being scanned.
*/
if (chan->band == NL80211_BAND_S1GHZ) {
local->scan_chandef.width = ieee80211_s1g_channel_width(chan);
goto set_channel;
}
- switch (scan_req->scan_width) {
- case NL80211_BSS_CHAN_WIDTH_5:
- local->scan_chandef.width = NL80211_CHAN_WIDTH_5;
- break;
- case NL80211_BSS_CHAN_WIDTH_10:
- local->scan_chandef.width = NL80211_CHAN_WIDTH_10;
- break;
- default:
- case NL80211_BSS_CHAN_WIDTH_20:
- /* If scanning on oper channel, use whatever channel-type
- * is currently in use.
- */
- oper_scan_width = cfg80211_chandef_to_scan_width(
- &local->_oper_chandef);
- if (chan == local->_oper_chandef.chan &&
- oper_scan_width == scan_req->scan_width)
- local->scan_chandef = local->_oper_chandef;
- else
- local->scan_chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
- break;
- case NL80211_BSS_CHAN_WIDTH_1:
- case NL80211_BSS_CHAN_WIDTH_2:
- /* shouldn't get here, S1G handled above */
- WARN_ON(1);
- break;
- }
+ /* If scanning on oper channel, use whatever channel-type
+ * is currently in use.
+ */
+ if (chan == local->_oper_chandef.chan)
+ local->scan_chandef = local->_oper_chandef;
+ else
+ local->scan_chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
set_channel:
if (ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL))
@@ -1051,7 +1016,7 @@ void ieee80211_scan_work(struct wiphy *wiphy, struct wiphy_work *work)
unsigned long next_delay = 0;
bool aborted;
- mutex_lock(&local->mtx);
+ lockdep_assert_wiphy(local->hw.wiphy);
if (!ieee80211_can_run_worker(local)) {
aborted = true;
@@ -1059,9 +1024,9 @@ void ieee80211_scan_work(struct wiphy *wiphy, struct wiphy_work *work)
}
sdata = rcu_dereference_protected(local->scan_sdata,
- lockdep_is_held(&local->mtx));
+ lockdep_is_held(&local->hw.wiphy->mtx));
scan_req = rcu_dereference_protected(local->scan_req,
- lockdep_is_held(&local->mtx));
+ lockdep_is_held(&local->hw.wiphy->mtx));
/* When scanning on-channel, the first-callback means completed. */
if (test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) {
@@ -1075,7 +1040,7 @@ void ieee80211_scan_work(struct wiphy *wiphy, struct wiphy_work *work)
}
if (!sdata || !scan_req)
- goto out;
+ return;
if (!local->scanning) {
int rc;
@@ -1084,13 +1049,12 @@ void ieee80211_scan_work(struct wiphy *wiphy, struct wiphy_work *work)
RCU_INIT_POINTER(local->scan_sdata, NULL);
rc = __ieee80211_start_scan(sdata, scan_req);
- if (rc) {
- /* need to complete scan in cfg80211 */
- rcu_assign_pointer(local->scan_req, scan_req);
- aborted = true;
- goto out_complete;
- } else
- goto out;
+ if (!rc)
+ return;
+ /* need to complete scan in cfg80211 */
+ rcu_assign_pointer(local->scan_req, scan_req);
+ aborted = true;
+ goto out_complete;
}
clear_bit(SCAN_BEACON_WAIT, &local->scanning);
@@ -1138,37 +1102,30 @@ void ieee80211_scan_work(struct wiphy *wiphy, struct wiphy_work *work)
wiphy_delayed_work_queue(local->hw.wiphy, &local->scan_work,
next_delay);
- goto out;
+ return;
out_complete:
__ieee80211_scan_completed(&local->hw, aborted);
-out:
- mutex_unlock(&local->mtx);
}
int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
struct cfg80211_scan_request *req)
{
- int res;
+ lockdep_assert_wiphy(sdata->local->hw.wiphy);
- mutex_lock(&sdata->local->mtx);
- res = __ieee80211_start_scan(sdata, req);
- mutex_unlock(&sdata->local->mtx);
-
- return res;
+ return __ieee80211_start_scan(sdata, req);
}
int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
const u8 *ssid, u8 ssid_len,
struct ieee80211_channel **channels,
- unsigned int n_channels,
- enum nl80211_bss_scan_width scan_width)
+ unsigned int n_channels)
{
struct ieee80211_local *local = sdata->local;
int ret = -EBUSY, i, n_ch = 0;
enum nl80211_band band;
- mutex_lock(&local->mtx);
+ lockdep_assert_wiphy(local->hw.wiphy);
/* busy scanning */
if (local->scan_req)
@@ -1219,13 +1176,11 @@ int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
local->int_scan_req->ssids = &local->scan_ssid;
local->int_scan_req->n_ssids = 1;
- local->int_scan_req->scan_width = scan_width;
memcpy(local->int_scan_req->ssids[0].ssid, ssid, IEEE80211_MAX_SSID_LEN);
local->int_scan_req->ssids[0].ssid_len = ssid_len;
ret = __ieee80211_start_scan(sdata, sdata->local->int_scan_req);
unlock:
- mutex_unlock(&local->mtx);
return ret;
}
@@ -1252,9 +1207,8 @@ void ieee80211_scan_cancel(struct ieee80211_local *local)
* after the scan was completed/aborted.
*/
- mutex_lock(&local->mtx);
if (!local->scan_req)
- goto out;
+ return;
/*
* We have a scan running and the driver already reported completion,
@@ -1264,7 +1218,7 @@ void ieee80211_scan_cancel(struct ieee80211_local *local)
if (test_bit(SCAN_HW_SCANNING, &local->scanning) &&
test_bit(SCAN_COMPLETED, &local->scanning)) {
set_bit(SCAN_HW_CANCELLED, &local->scanning);
- goto out;
+ return;
}
if (test_bit(SCAN_HW_SCANNING, &local->scanning)) {
@@ -1276,16 +1230,14 @@ void ieee80211_scan_cancel(struct ieee80211_local *local)
if (local->ops->cancel_hw_scan)
drv_cancel_hw_scan(local,
rcu_dereference_protected(local->scan_sdata,
- lockdep_is_held(&local->mtx)));
- goto out;
+ lockdep_is_held(&local->hw.wiphy->mtx)));
+ return;
}
wiphy_delayed_work_cancel(local->hw.wiphy, &local->scan_work);
/* and clean up */
memset(&local->scan_info, 0, sizeof(local->scan_info));
__ieee80211_scan_completed(&local->hw, true);
-out:
- mutex_unlock(&local->mtx);
}
int __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
@@ -1300,9 +1252,9 @@ int __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
u8 *ie;
u32 flags = 0;
- iebufsz = local->scan_ies_len + req->ie_len;
+ lockdep_assert_wiphy(local->hw.wiphy);
- lockdep_assert_held(&local->mtx);
+ iebufsz = local->scan_ies_len + req->ie_len;
if (!local->ops->sched_scan_start)
return -ENOTSUPP;
@@ -1324,7 +1276,7 @@ int __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
goto out;
}
- ieee80211_prepare_scan_chandef(&chandef, req->scan_width);
+ ieee80211_prepare_scan_chandef(&chandef);
ieee80211_build_preq_ies(sdata, ie, num_bands * iebufsz,
&sched_scan_ies, req->ie,
@@ -1353,19 +1305,13 @@ int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
struct cfg80211_sched_scan_request *req)
{
struct ieee80211_local *local = sdata->local;
- int ret;
- mutex_lock(&local->mtx);
+ lockdep_assert_wiphy(local->hw.wiphy);
- if (rcu_access_pointer(local->sched_scan_sdata)) {
- mutex_unlock(&local->mtx);
+ if (rcu_access_pointer(local->sched_scan_sdata))
return -EBUSY;
- }
-
- ret = __ieee80211_request_sched_scan_start(sdata, req);
- mutex_unlock(&local->mtx);
- return ret;
+ return __ieee80211_request_sched_scan_start(sdata, req);
}
int ieee80211_request_sched_scan_stop(struct ieee80211_local *local)
@@ -1373,25 +1319,21 @@ int ieee80211_request_sched_scan_stop(struct ieee80211_local *local)
struct ieee80211_sub_if_data *sched_scan_sdata;
int ret = -ENOENT;
- mutex_lock(&local->mtx);
+ lockdep_assert_wiphy(local->hw.wiphy);
- if (!local->ops->sched_scan_stop) {
- ret = -ENOTSUPP;
- goto out;
- }
+ if (!local->ops->sched_scan_stop)
+ return -ENOTSUPP;
/* We don't want to restart sched scan anymore. */
RCU_INIT_POINTER(local->sched_scan_req, NULL);
sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
- lockdep_is_held(&local->mtx));
+ lockdep_is_held(&local->hw.wiphy->mtx));
if (sched_scan_sdata) {
ret = drv_sched_scan_stop(local, sched_scan_sdata);
if (!ret)
RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
}
-out:
- mutex_unlock(&local->mtx);
return ret;
}
@@ -1408,20 +1350,16 @@ EXPORT_SYMBOL(ieee80211_sched_scan_results);
void ieee80211_sched_scan_end(struct ieee80211_local *local)
{
- mutex_lock(&local->mtx);
+ lockdep_assert_wiphy(local->hw.wiphy);
- if (!rcu_access_pointer(local->sched_scan_sdata)) {
- mutex_unlock(&local->mtx);
+ if (!rcu_access_pointer(local->sched_scan_sdata))
return;
- }
RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
/* If sched scan was aborted by the driver. */
RCU_INIT_POINTER(local->sched_scan_req, NULL);
- mutex_unlock(&local->mtx);
-
cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 17:48:59 +0000