cfg80211/nl80211: add API for MAC address ACLs

Add API to enable drivers to implement MAC address based
access control in AP/P2P GO mode. Capable drivers advertise
this capability by setting the maximum number of MAC
addresses in such a list in wiphy->max_acl_mac_addrs.

An initial ACL may be given to the NL80211_CMD_START_AP
command and/or changed later with NL80211_CMD_SET_MAC_ACL.

Black- and whitelists are supported, but not simultaneously.

Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
[rewrite commit log, many cleanups]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/wireless/trace.h b/net/wireless/trace.h
index 2134576..8bc5531 100644
--- a/net/wireless/trace.h
+++ b/net/wireless/trace.h
@@ -1767,6 +1767,24 @@
 	TP_ARGS(wiphy, wdev)
 );
 
+TRACE_EVENT(rdev_set_mac_acl,
+	TP_PROTO(struct wiphy *wiphy, struct net_device *netdev,
+		 struct cfg80211_acl_data *params),
+	TP_ARGS(wiphy, netdev, params),
+	TP_STRUCT__entry(
+		WIPHY_ENTRY
+		NETDEV_ENTRY
+		__field(u32, acl_policy)
+	),
+	TP_fast_assign(
+		WIPHY_ASSIGN;
+		WIPHY_ASSIGN;
+		__entry->acl_policy = params->acl_policy;
+	),
+	TP_printk(WIPHY_PR_FMT ", " NETDEV_PR_FMT ", acl policy: %d",
+		  WIPHY_PR_ARG, NETDEV_PR_ARG, __entry->acl_policy)
+);
+
 /*************************************************************
  *	     cfg80211 exported functions traces		     *
  *************************************************************/