mac80211: add IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF
Johannes Berg [Tue, 19 Jun 2012 15:19:44 +0000 (17:19 +0200)]
Some devices like the current iwlwifi implementation
require that the P2P interface address match the P2P
Device address (only one P2P interface is supported.)
Add the HW flag IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF
that allows drivers to request that P2P Interfaces
added while a P2P Device is active get the same MAC
address by default.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

include/net/mac80211.h
net/mac80211/iface.c

index edc235c..71f8262 100644 (file)
@@ -1241,6 +1241,10 @@ struct ieee80211_tx_control {
  *     queue mapping in order to use different queues (not just one per AC)
  *     for different virtual interfaces. See the doc section on HW queue
  *     control for more details.
+ *
+ * @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any
+ *     P2P Interface. This will be honoured even if more than one interface
+ *     is supported.
  */
 enum ieee80211_hw_flags {
        IEEE80211_HW_HAS_RATE_CONTROL                   = 1<<0,
@@ -1268,6 +1272,7 @@ enum ieee80211_hw_flags {
        IEEE80211_HW_AP_LINK_PS                         = 1<<22,
        IEEE80211_HW_TX_AMPDU_SETUP_IN_HW               = 1<<23,
        IEEE80211_HW_SCAN_WHILE_IDLE                    = 1<<24,
+       IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF              = 1<<25,
 };
 
 /**
index 152aeea..59f8adc 100644 (file)
@@ -1313,7 +1313,6 @@ static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
            local->hw.wiphy->n_addresses <= 1)
                return;
 
-
        mutex_lock(&local->iflist_mtx);
 
        switch (type) {
@@ -1331,6 +1330,19 @@ static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
                }
                /* keep default if no AP interface present */
                break;
+       case NL80211_IFTYPE_P2P_CLIENT:
+       case NL80211_IFTYPE_P2P_GO:
+               if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
+                       list_for_each_entry(sdata, &local->interfaces, list) {
+                               if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
+                                       continue;
+                               if (!ieee80211_sdata_running(sdata))
+                                       continue;
+                               memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
+                               goto out_unlock;
+                       }
+               }
+               /* otherwise fall through */
        default:
                /* assign a new address if possible -- try n_addresses first */
                for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
@@ -1405,6 +1417,7 @@ static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
                break;
        }
 
+ out_unlock:
        mutex_unlock(&local->iflist_mtx);
 }