mac80211: support creating vifs with specified mac address

This is useful when creating virtual interfaces.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/iface.c

@@ -1671,7 +1671,10 @@ int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 		}
 
 		ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
-		memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
+		if (params && is_valid_ether_addr(params->macaddr))
+			memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
+		else
+			memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
 		SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
 
 		/* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */

net/mac80211/main.c

@@ -542,6 +542,7 @@ struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 			   NL80211_FEATURE_SAE |
 			   NL80211_FEATURE_HT_IBSS |
 			   NL80211_FEATURE_VIF_TXPOWER |
+			   NL80211_FEATURE_MAC_ON_CREATE |
 			   NL80211_FEATURE_USERSPACE_MPM;
 
 	if (!ops->hw_scan)