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-rw-r--r--net/mac80211/scan.c129
1 files changed, 84 insertions, 45 deletions
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 71e10cabf81..4cf387c944b 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -12,8 +12,6 @@
* published by the Free Software Foundation.
*/
-/* TODO: figure out how to avoid that the "current BSS" expires */
-
#include <linux/wireless.h>
#include <linux/if_arp.h>
#include <linux/rtnetlink.h>
@@ -189,6 +187,39 @@ ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
return RX_QUEUED;
}
+/* return false if no more work */
+static bool ieee80211_prep_hw_scan(struct ieee80211_local *local)
+{
+ struct cfg80211_scan_request *req = local->scan_req;
+ enum ieee80211_band band;
+ int i, ielen, n_chans;
+
+ do {
+ if (local->hw_scan_band == IEEE80211_NUM_BANDS)
+ return false;
+
+ band = local->hw_scan_band;
+ n_chans = 0;
+ for (i = 0; i < req->n_channels; i++) {
+ if (req->channels[i]->band == band) {
+ local->hw_scan_req->channels[n_chans] =
+ req->channels[i];
+ n_chans++;
+ }
+ }
+
+ local->hw_scan_band++;
+ } while (!n_chans);
+
+ local->hw_scan_req->n_channels = n_chans;
+
+ ielen = ieee80211_build_preq_ies(local, (u8 *)local->hw_scan_req->ie,
+ req->ie, req->ie_len, band);
+ local->hw_scan_req->ie_len = ielen;
+
+ return true;
+}
+
/*
* inform AP that we will go to sleep so that it will buffer the frames
* while we scan
@@ -249,13 +280,6 @@ static void ieee80211_scan_ps_disable(struct ieee80211_sub_if_data *sdata)
}
}
-static void ieee80211_restore_scan_ies(struct ieee80211_local *local)
-{
- kfree(local->scan_req->ie);
- local->scan_req->ie = local->orig_ies;
- local->scan_req->ie_len = local->orig_ies_len;
-}
-
void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted)
{
struct ieee80211_local *local = hw_to_local(hw);
@@ -264,25 +288,36 @@ void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted)
mutex_lock(&local->scan_mtx);
- if (WARN_ON(!local->scanning)) {
+ /*
+ * It's ok to abort a not-yet-running scan (that
+ * we have one at all will be verified by checking
+ * local->scan_req next), but not to complete it
+ * successfully.
+ */
+ if (WARN_ON(!local->scanning && !aborted))
+ aborted = true;
+
+ if (WARN_ON(!local->scan_req)) {
mutex_unlock(&local->scan_mtx);
return;
}
- if (WARN_ON(!local->scan_req)) {
+ was_hw_scan = test_bit(SCAN_HW_SCANNING, &local->scanning);
+ if (was_hw_scan && !aborted && ieee80211_prep_hw_scan(local)) {
+ ieee80211_queue_delayed_work(&local->hw,
+ &local->scan_work, 0);
mutex_unlock(&local->scan_mtx);
return;
}
- if (test_bit(SCAN_HW_SCANNING, &local->scanning))
- ieee80211_restore_scan_ies(local);
+ kfree(local->hw_scan_req);
+ local->hw_scan_req = NULL;
if (local->scan_req != local->int_scan_req)
cfg80211_scan_done(local->scan_req, aborted);
local->scan_req = NULL;
local->scan_sdata = NULL;
- was_hw_scan = test_bit(SCAN_HW_SCANNING, &local->scanning);
local->scanning = 0;
local->scan_channel = NULL;
@@ -306,10 +341,10 @@ void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted)
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
if (sdata->u.mgd.associated) {
ieee80211_scan_ps_disable(sdata);
- netif_tx_wake_all_queues(sdata->dev);
+ netif_wake_queue(sdata->dev);
}
} else
- netif_tx_wake_all_queues(sdata->dev);
+ netif_wake_queue(sdata->dev);
/* re-enable beaconing */
if (sdata->vif.type == NL80211_IFTYPE_AP ||
@@ -364,7 +399,7 @@ static int ieee80211_start_sw_scan(struct ieee80211_local *local)
* are handled in the scan state machine
*/
if (sdata->vif.type != NL80211_IFTYPE_STATION)
- netif_tx_stop_all_queues(sdata->dev);
+ netif_stop_queue(sdata->dev);
}
mutex_unlock(&local->iflist_mtx);
@@ -394,19 +429,23 @@ static int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata,
if (local->ops->hw_scan) {
u8 *ies;
- int ielen;
- ies = kmalloc(2 + IEEE80211_MAX_SSID_LEN +
- local->scan_ies_len + req->ie_len, GFP_KERNEL);
- if (!ies)
+ local->hw_scan_req = kmalloc(
+ sizeof(*local->hw_scan_req) +
+ req->n_channels * sizeof(req->channels[0]) +
+ 2 + IEEE80211_MAX_SSID_LEN + local->scan_ies_len +
+ req->ie_len, GFP_KERNEL);
+ if (!local->hw_scan_req)
return -ENOMEM;
- ielen = ieee80211_build_preq_ies(local, ies,
- req->ie, req->ie_len);
- local->orig_ies = req->ie;
- local->orig_ies_len = req->ie_len;
- req->ie = ies;
- req->ie_len = ielen;
+ local->hw_scan_req->ssids = req->ssids;
+ local->hw_scan_req->n_ssids = req->n_ssids;
+ ies = (u8 *)local->hw_scan_req +
+ sizeof(*local->hw_scan_req) +
+ req->n_channels * sizeof(req->channels[0]);
+ local->hw_scan_req->ie = ies;
+
+ local->hw_scan_band = 0;
}
local->scan_req = req;
@@ -438,16 +477,17 @@ static int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata,
ieee80211_recalc_idle(local);
mutex_unlock(&local->scan_mtx);
- if (local->ops->hw_scan)
- rc = drv_hw_scan(local, local->scan_req);
- else
+ if (local->ops->hw_scan) {
+ WARN_ON(!ieee80211_prep_hw_scan(local));
+ rc = drv_hw_scan(local, local->hw_scan_req);
+ } else
rc = ieee80211_start_sw_scan(local);
mutex_lock(&local->scan_mtx);
if (rc) {
- if (local->ops->hw_scan)
- ieee80211_restore_scan_ies(local);
+ kfree(local->hw_scan_req);
+ local->hw_scan_req = NULL;
local->scanning = 0;
ieee80211_recalc_idle(local);
@@ -523,7 +563,7 @@ static void ieee80211_scan_state_leave_oper_channel(struct ieee80211_local *loca
continue;
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
- netif_tx_stop_all_queues(sdata->dev);
+ netif_stop_queue(sdata->dev);
if (sdata->u.mgd.associated)
ieee80211_scan_ps_enable(sdata);
}
@@ -558,7 +598,7 @@ static void ieee80211_scan_state_enter_oper_channel(struct ieee80211_local *loca
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
if (sdata->u.mgd.associated)
ieee80211_scan_ps_disable(sdata);
- netif_tx_wake_all_queues(sdata->dev);
+ netif_wake_queue(sdata->dev);
}
}
mutex_unlock(&local->iflist_mtx);
@@ -574,23 +614,14 @@ static void ieee80211_scan_state_set_channel(struct ieee80211_local *local,
{
int skip;
struct ieee80211_channel *chan;
- struct ieee80211_sub_if_data *sdata = local->scan_sdata;
skip = 0;
chan = local->scan_req->channels[local->scan_channel_idx];
- if (chan->flags & IEEE80211_CHAN_DISABLED ||
- (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
- chan->flags & IEEE80211_CHAN_NO_IBSS))
+ local->scan_channel = chan;
+ if (ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL))
skip = 1;
- if (!skip) {
- local->scan_channel = chan;
- if (ieee80211_hw_config(local,
- IEEE80211_CONF_CHANGE_CHANNEL))
- skip = 1;
- }
-
/* advance state machine to next channel/band */
local->scan_channel_idx++;
@@ -656,6 +687,14 @@ void ieee80211_scan_work(struct work_struct *work)
return;
}
+ if (local->hw_scan_req) {
+ int rc = drv_hw_scan(local, local->hw_scan_req);
+ mutex_unlock(&local->scan_mtx);
+ if (rc)
+ ieee80211_scan_completed(&local->hw, true);
+ return;
+ }
+
if (local->scan_req && !local->scanning) {
struct cfg80211_scan_request *req = local->scan_req;
int rc;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-26 02:54:34 +0000