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Diffstat (limited to 'net/mac80211/scan.c')
-rw-r--r--net/mac80211/scan.c75
1 files changed, 27 insertions, 48 deletions
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index bf82e69d060..43a45cf00e0 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -27,22 +27,15 @@
#define IEEE80211_PROBE_DELAY (HZ / 33)
#define IEEE80211_CHANNEL_TIME (HZ / 33)
-#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 8)
-
-static void ieee80211_rx_bss_free(struct cfg80211_bss *cbss)
-{
- struct ieee80211_bss *bss = (void *)cbss->priv;
-
- kfree(bss_mesh_id(bss));
- kfree(bss_mesh_cfg(bss));
-}
+#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 9)
void ieee80211_rx_bss_put(struct ieee80211_local *local,
struct ieee80211_bss *bss)
{
if (!bss)
return;
- cfg80211_put_bss(container_of((void *)bss, struct cfg80211_bss, priv));
+ cfg80211_put_bss(local->hw.wiphy,
+ container_of((void *)bss, struct cfg80211_bss, priv));
}
static bool is_uapsd_supported(struct ieee802_11_elems *elems)
@@ -65,12 +58,11 @@ static bool is_uapsd_supported(struct ieee802_11_elems *elems)
struct ieee80211_bss *
ieee80211_bss_info_update(struct ieee80211_local *local,
struct ieee80211_rx_status *rx_status,
- struct ieee80211_mgmt *mgmt,
- size_t len,
+ struct ieee80211_mgmt *mgmt, size_t len,
struct ieee802_11_elems *elems,
- struct ieee80211_channel *channel,
- bool beacon)
+ struct ieee80211_channel *channel)
{
+ bool beacon = ieee80211_is_beacon(mgmt->frame_control);
struct cfg80211_bss *cbss;
struct ieee80211_bss *bss;
int clen, srlen;
@@ -86,10 +78,12 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
if (!cbss)
return NULL;
- cbss->free_priv = ieee80211_rx_bss_free;
bss = (void *)cbss->priv;
- bss->device_ts = rx_status->device_timestamp;
+ if (beacon)
+ bss->device_ts_beacon = rx_status->device_timestamp;
+ else
+ bss->device_ts_presp = rx_status->device_timestamp;
if (elems->parse_error) {
if (beacon)
@@ -147,9 +141,6 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
bss->valid_data |= IEEE80211_BSS_VALID_WMM;
}
- if (!beacon)
- bss->last_probe_resp = jiffies;
-
return bss;
}
@@ -203,7 +194,7 @@ void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb)
bss = ieee80211_bss_info_update(local, rx_status,
mgmt, skb->len, &elems,
- channel, beacon);
+ channel);
if (bss)
ieee80211_rx_bss_put(local, bss);
}
@@ -343,6 +334,9 @@ static int ieee80211_start_sw_scan(struct ieee80211_local *local)
ieee80211_offchannel_stop_vifs(local);
+ /* ensure nullfunc is transmitted before leaving operating channel */
+ drv_flush(local, false);
+
ieee80211_configure_filter(local);
/* We need to set power level at maximum rate for scanning. */
@@ -357,6 +351,9 @@ static int ieee80211_start_sw_scan(struct ieee80211_local *local)
static bool ieee80211_can_scan(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata)
{
+ if (local->radar_detect_enabled)
+ return false;
+
if (!list_empty(&local->roc_list))
return false;
@@ -391,6 +388,11 @@ static void ieee80211_scan_state_send_probe(struct ieee80211_local *local,
int i;
struct ieee80211_sub_if_data *sdata;
enum ieee80211_band band = local->hw.conf.channel->band;
+ u32 tx_flags;
+
+ tx_flags = IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
+ if (local->scan_req->no_cck)
+ tx_flags |= IEEE80211_TX_CTL_NO_CCK_RATE;
sdata = rcu_dereference_protected(local->scan_sdata,
lockdep_is_held(&local->mtx));
@@ -402,8 +404,7 @@ static void ieee80211_scan_state_send_probe(struct ieee80211_local *local,
local->scan_req->ssids[i].ssid_len,
local->scan_req->ie, local->scan_req->ie_len,
local->scan_req->rates[band], false,
- local->scan_req->no_cck,
- local->hw.conf.channel, true);
+ tx_flags, local->hw.conf.channel, true);
/*
* After sending probe requests, wait for probe responses
@@ -547,8 +548,6 @@ static void ieee80211_scan_state_decision(struct ieee80211_local *local,
bool associated = false;
bool tx_empty = true;
bool bad_latency;
- bool listen_int_exceeded;
- unsigned long min_beacon_int = 0;
struct ieee80211_sub_if_data *sdata;
struct ieee80211_channel *next_chan;
enum mac80211_scan_state next_scan_state;
@@ -567,11 +566,6 @@ static void ieee80211_scan_state_decision(struct ieee80211_local *local,
if (sdata->u.mgd.associated) {
associated = true;
- if (sdata->vif.bss_conf.beacon_int <
- min_beacon_int || min_beacon_int == 0)
- min_beacon_int =
- sdata->vif.bss_conf.beacon_int;
-
if (!qdisc_all_tx_empty(sdata->dev)) {
tx_empty = false;
break;
@@ -588,34 +582,19 @@ static void ieee80211_scan_state_decision(struct ieee80211_local *local,
* see if we can scan another channel without interfering
* with the current traffic situation.
*
- * Since we don't know if the AP has pending frames for us
- * we can only check for our tx queues and use the current
- * pm_qos requirements for rx. Hence, if no tx traffic occurs
- * at all we will scan as many channels in a row as the pm_qos
- * latency allows us to. Additionally we also check for the
- * currently negotiated listen interval to prevent losing
- * frames unnecessarily.
- *
- * Otherwise switch back to the operating channel.
+ * Keep good latency, do not stay off-channel more than 125 ms.
*/
bad_latency = time_after(jiffies +
- ieee80211_scan_get_channel_time(next_chan),
- local->leave_oper_channel_time +
- usecs_to_jiffies(pm_qos_request(PM_QOS_NETWORK_LATENCY)));
-
- listen_int_exceeded = time_after(jiffies +
- ieee80211_scan_get_channel_time(next_chan),
- local->leave_oper_channel_time +
- usecs_to_jiffies(min_beacon_int * 1024) *
- local->hw.conf.listen_interval);
+ ieee80211_scan_get_channel_time(next_chan),
+ local->leave_oper_channel_time + HZ / 8);
if (associated && !tx_empty) {
if (local->scan_req->flags & NL80211_SCAN_FLAG_LOW_PRIORITY)
next_scan_state = SCAN_ABORT;
else
next_scan_state = SCAN_SUSPEND;
- } else if (associated && (bad_latency || listen_int_exceeded)) {
+ } else if (associated && bad_latency) {
next_scan_state = SCAN_SUSPEND;
} else {
next_scan_state = SCAN_SET_CHANNEL;
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-24 05:27:17 +0000