From cbfa4b61925036c3d864904cab932919518ee547 Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes@sipsolutions.net>
Date: Fri, 9 Nov 2007 01:57:29 +0100
Subject: [PATCH] --- yaml --- r: 78173 b: refs/heads/master c:
 dabeb344f54ab780d152714c18f1cb6b21c471a1 h: refs/heads/master i:   78171:
 3ef6e97d86cdec6cbd6059bc512a98802dfe2b73 v: v3

---
 [refs]                       |  2 +-
 trunk/include/net/mac80211.h | 16 ++++++++++++++++
 trunk/net/mac80211/util.c    | 33 +++++++++++++++++++++++++++++++++
 3 files changed, 50 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 3d9836b73691..1eb0f2bdf7a2 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9859a79023d71dd4e56c195a345abc4112abfd02
+refs/heads/master: dabeb344f54ab780d152714c18f1cb6b21c471a1
diff --git a/trunk/include/net/mac80211.h b/trunk/include/net/mac80211.h
index 17b60391fcd6..1470e1b886f0 100644
--- a/trunk/include/net/mac80211.h
+++ b/trunk/include/net/mac80211.h
@@ -1406,4 +1406,20 @@ void ieee80211_wake_queues(struct ieee80211_hw *hw);
  */
 void ieee80211_scan_completed(struct ieee80211_hw *hw);
 
+/**
+ * ieee80211_iterate_active_interfaces - iterate active interfaces
+ *
+ * This function iterates over the interfaces associated with a given
+ * hardware that are currently active and calls the callback for them.
+ * Must be called under RTNL.
+ *
+ * @hw: the hardware struct of which the interfaces should be iterated over
+ * @iterator: the iterator function to call
+ * @data: first argument of the iterator function
+ */
+void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw,
+					 void (*iterator)(void *data, u8 *mac,
+							  int if_id),
+					 void *data);
+
 #endif /* MAC80211_H */
diff --git a/trunk/net/mac80211/util.c b/trunk/net/mac80211/util.c
index 5a0564e1dbd6..88f262baaa5e 100644
--- a/trunk/net/mac80211/util.c
+++ b/trunk/net/mac80211/util.c
@@ -22,6 +22,7 @@
 #include <linux/bitmap.h>
 #include <net/net_namespace.h>
 #include <net/cfg80211.h>
+#include <net/rtnetlink.h>
 
 #include "ieee80211_i.h"
 #include "ieee80211_rate.h"
@@ -484,3 +485,35 @@ void ieee80211_wake_queues(struct ieee80211_hw *hw)
 		ieee80211_wake_queue(hw, i);
 }
 EXPORT_SYMBOL(ieee80211_wake_queues);
+
+void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw,
+					 void (*iterator)(void *data, u8 *mac,
+							  int if_id),
+					 void *data)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_sub_if_data *sdata;
+
+	ASSERT_RTNL();
+
+	/* we hold the RTNL here so can safely walk the list */
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		switch (sdata->type) {
+		case IEEE80211_IF_TYPE_INVALID:
+		case IEEE80211_IF_TYPE_MNTR:
+		case IEEE80211_IF_TYPE_VLAN:
+			continue;
+		case IEEE80211_IF_TYPE_AP:
+		case IEEE80211_IF_TYPE_STA:
+		case IEEE80211_IF_TYPE_IBSS:
+		case IEEE80211_IF_TYPE_WDS:
+			break;
+		}
+		if (sdata->dev == local->mdev)
+			continue;
+		if (netif_running(sdata->dev))
+			iterator(data, sdata->dev->dev_addr,
+				 sdata->dev->ifindex);
+	}
+}
+EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);