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authorJohannes Berg <johannes@sipsolutions.net>2007-11-09 01:57:29 +0100
committerDavid S. Miller <davem@davemloft.net>2008-01-28 14:54:37 -0800
commitdabeb344f54ab780d152714c18f1cb6b21c471a1 (patch)
treeb93be2a461b00882491bc8b7d3780476ca71bf7e
parent9859a79023d71dd4e56c195a345abc4112abfd02 (diff)
mac80211: provide interface iterator for drivers
Sometimes drivers need to know which interfaces are associated with their hardware. Rather than forcing those drivers to keep track of the interfaces that were added, this adds an iteration function to mac80211. As it is intended to be used from the interface add/remove callbacks, the iteration function may currently only be called under RTNL. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/net/mac80211.h16
-rw-r--r--net/mac80211/util.c33
2 files changed, 49 insertions, 0 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 17b60391fcd..1470e1b886f 100644
--- a/include/net/mac80211.h
+++ b/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/net/mac80211/util.c b/net/mac80211/util.c
index 5a0564e1dbd..88f262baaa5 100644
--- a/net/mac80211/util.c
+++ b/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);