cfg80211: Add background scan period attribute.

Receive background scan period as part of connect
command and pass the same to the driver.

Signed-off-by: Bala Shanmugam <bkamatch@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

4 files changed, 24 insertions, 0 deletions

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index c37d67add090..e474f6e780cc 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -369,6 +369,11 @@
  *      %NL80211_ATTR_WIPHY_FREQ, %NL80211_ATTR_CONTROL_PORT,
  *      %NL80211_ATTR_CONTROL_PORT_ETHERTYPE and
  *      %NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT.
+ *      Background scan period can optionally be
+ *      specified in %NL80211_ATTR_BG_SCAN_PERIOD,
+ *      if not specified default background scan configuration
+ *      in driver is used and if period value is 0, bg scan will be disabled.
+ *      This attribute is ignored if driver does not support roam scan.
  *      It is also sent as an event, with the BSSID and response IEs when the
  *      connection is established or failed to be established. This can be
  *      determined by the STATUS_CODE attribute.
@@ -1207,6 +1212,9 @@ enum nl80211_commands {
  *      this attribute is (depending on the driver capabilities) added to
  *      received frames indicated with %NL80211_CMD_FRAME.
  *
+ * @NL80211_ATTR_BG_SCAN_PERIOD: Background scan period in seconds
+ *      or 0 to disable background scan.
+ *
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
  */
@@ -1456,6 +1464,8 @@ enum nl80211_attrs {
 
         NL80211_ATTR_RX_SIGNAL_DBM,
 
+        NL80211_ATTR_BG_SCAN_PERIOD,
+
         /* add attributes here, update the policy in nl80211.c */
 
         __NL80211_ATTR_AFTER_LAST,
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 57c9fddc2acf..66f460325e24 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1203,6 +1203,8 @@ struct cfg80211_ibss_params {
  * @key_idx: index of WEP key for shared key authentication
  * @key: WEP key for shared key authentication
  * @flags:  See &enum cfg80211_assoc_req_flags
+ * @bg_scan_period:  Background scan period in seconds
+ *   or -1 to indicate that default value is to be used.
  * @ht_capa:  HT Capabilities over-rides.  Values set in ht_capa_mask
  *   will be used in ht_capa.  Un-supported values will be ignored.
  * @ht_capa_mask:  The bits of ht_capa which are to be used.
@@ -1220,6 +1222,7 @@ struct cfg80211_connect_params {
         const u8 *key;
         u8 key_len, key_idx;
         u32 flags;
+        int bg_scan_period;
         struct ieee80211_ht_cap ht_capa;
         struct ieee80211_ht_cap ht_capa_mask;
 };
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 39dbdf2adb12..4c1eb9472ddb 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -205,6 +205,7 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
         },
         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
+        [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 };
 
 /* policy for the key attributes */
@@ -5116,6 +5117,13 @@ static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
 
         wiphy = &rdev->wiphy;
 
+        connect.bg_scan_period = -1;
+        if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
+                (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
+                connect.bg_scan_period =
+                        nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
+        }
+
         if (info->attrs[NL80211_ATTR_MAC])
                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
diff --git a/net/wireless/wext-sme.c b/net/wireless/wext-sme.c
index 326750b99151..7c01c2f3b6cf 100644
--- a/net/wireless/wext-sme.c
+++ b/net/wireless/wext-sme.c
@@ -30,6 +30,9 @@ int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
         wdev->wext.connect.ie = wdev->wext.ie;
         wdev->wext.connect.ie_len = wdev->wext.ie_len;
 
+        /* Use default background scan period */
+        wdev->wext.connect.bg_scan_period = -1;
+
         if (wdev->wext.keys) {
                 wdev->wext.keys->def = wdev->wext.default_key;
                 wdev->wext.keys->defmgmt = wdev->wext.default_mgmt_key;