[PATCH] mac80211: expose API allowing station iteration

[Emmanuel Grumbach]

From: Arik Nemtsov <arik-Ix1uc/W3ht7QT0dZR+***@public.gmane.org>

Allow drivers to iterate all stations currently uploaded to them.

Signed-off-by: Arik Nemtsov <arikx.nemtsov-***@public.gmane.org>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach-***@public.gmane.org>
---
include/net/mac80211.h | 16 ++++++++++++++++
net/mac80211/util.c | 28 ++++++++++++++++++++++++++++
2 files changed, 44 insertions(+)

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 9dc5e76..e544bbf 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -4190,6 +4190,22 @@ void ieee80211_iterate_active_interfaces_rtnl(struct ieee80211_hw *hw,
void *data);

/**
+ * ieee80211_iterate_stations_atomic - iterate stations
+ *
+ * This function iterates over all stations associated with a given
+ * hardware that are currently uploaded to the driver and calls the callback
+ * function for them.
+ * This function requires the iterator callback function to be atomic,
+ *
+ * @hw: the hardware struct of which the interfaces should be iterated over
+ * @iterator: the iterator function to call, cannot sleep
+ * @data: first argument of the iterator function
+ */
+void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
+ void (*iterator)(void *data,
+ struct ieee80211_sta *sta),
+ void *data);
+/**
* ieee80211_queue_work - add work onto the mac80211 workqueue
*
* Drivers and mac80211 use this to add work onto the mac80211 workqueue.
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index c76c9d7..3d07d8d 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -693,6 +693,34 @@ void ieee80211_iterate_active_interfaces_rtnl(
}
EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);

+static void __iterate_stations(struct ieee80211_local *local,
+ void (*iterator)(void *data,
+ struct ieee80211_sta *sta),
+ void *data)
+{
+ struct sta_info *sta;
+
+ list_for_each_entry_rcu(sta, &local->sta_list, list) {
+ if (!sta->uploaded)
+ continue;
+
+ iterator(data, &sta->sta);
+ }
+}
+
+void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
+ void (*iterator)(void *data,
+ struct ieee80211_sta *sta),
+ void *data)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+
+ rcu_read_lock();
+ __iterate_stations(local, iterator, data);
+ rcu_read_unlock();
+}
+EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
+
struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);

[Johannes Berg]

Post by Emmanuel Grumbach
Allow drivers to iterate all stations currently uploaded to them.

Applied.

johannes

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