cfg80211/nl80211: scanning (and mac80211 update to use it)

This patch adds basic scan capability to cfg80211/nl80211 and
changes mac80211 to use it. The BSS list that cfg80211 maintains
is made driver-accessible with a private area in each BSS struct,
but mac80211 doesn't yet use it. That's another large project.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

4 files changed, 25 insertions, 7 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index c196abc6db7a..539960da7e13 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -2678,11 +2678,19 @@ static void iwl_bss_info_changed(struct ieee80211_hw *hw,
 
 }
 
-static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t ssid_len)
+static int iwl_mac_hw_scan(struct ieee80211_hw *hw,
+                           struct cfg80211_scan_request *req)
 {
         unsigned long flags;
         struct iwl_priv *priv = hw->priv;
         int ret;
+        u8 *ssid = NULL;
+        size_t ssid_len = 0;
+
+        if (req->n_ssids) {
+                ssid = req->ssids[0].ssid;
+                ssid_len = req->ssids[0].ssid_len;
+        }
 
         IWL_DEBUG_MAC80211(priv, "enter\n");
 
@@ -2718,7 +2726,7 @@ static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t ssid_len)
 
         if (ssid_len) {
                 priv->one_direct_scan = 1;
-                priv->direct_ssid_len =  min_t(u8, ssid_len, IW_ESSID_MAX_SIZE);
+                priv->direct_ssid_len = ssid_len;
                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
         } else {
                 priv->one_direct_scan = 0;
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index e18c3f326f71..260bf903cb71 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -1271,6 +1271,7 @@ int iwl_setup_mac(struct iwl_priv *priv)
                 BIT(NL80211_IFTYPE_ADHOC);
 
         hw->wiphy->custom_regulatory = true;
+        hw->wiphy->max_scan_ssids = 1;
 
         /* Default value; 4 EDCA QOS priorities */
         hw->queues = 4;
diff --git a/drivers/net/wireless/iwlwifi/iwl-scan.c b/drivers/net/wireless/iwlwifi/iwl-scan.c
index 22bad3ce7d6a..1ec2b20eb37c 100644
--- a/drivers/net/wireless/iwlwifi/iwl-scan.c
+++ b/drivers/net/wireless/iwlwifi/iwl-scan.c
@@ -860,7 +860,7 @@ void iwl_bg_scan_completed(struct work_struct *work)
         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
                 return;
 
-        ieee80211_scan_completed(priv->hw);
+        ieee80211_scan_completed(priv->hw, false);
 
         /* Since setting the TXPOWER may have been deferred while
          * performing the scan, fire one off */
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index 42cc2884971c..0cd8cb96a5ef 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -4442,15 +4442,23 @@ static void iwl3945_bss_info_changed(struct ieee80211_hw *hw,
 
 }
 
-static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
+static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw,
+                               struct cfg80211_scan_request *req)
 {
         int rc = 0;
         unsigned long flags;
         struct iwl_priv *priv = hw->priv;
+        size_t len = 0;
+        u8 *ssid = NULL;
         DECLARE_SSID_BUF(ssid_buf);
 
         IWL_DEBUG_MAC80211(priv, "enter\n");
 
+        if (req->n_ssids) {
+                ssid = req->ssids[0].ssid;
+                len = req->ssids[0].ssid_len;
+        }
+
         mutex_lock(&priv->mutex);
         spin_lock_irqsave(&priv->lock, flags);
 
@@ -4478,9 +4486,8 @@ static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
                                print_ssid(ssid_buf, ssid, len), len);
 
                 priv->one_direct_scan = 1;
-                priv->direct_ssid_len = (u8)
-                    min((u8) len, (u8) IW_ESSID_MAX_SIZE);
-                memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
+                priv->direct_ssid_len = len;
+                memcpy(priv->direct_ssid, ssid, len);
         } else
                 priv->one_direct_scan = 0;
 
@@ -5412,6 +5419,8 @@ static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *e
 
         hw->wiphy->custom_regulatory = true;
 
+        hw->wiphy->max_scan_ssids = 1;
+
         /* 4 EDCA QOS priorities */
         hw->queues = 4;