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-rw-r--r--include/net/cfg80211.h20
-rw-r--r--net/wireless/scan.c21
2 files changed, 41 insertions, 0 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index ac758a54e971..4cd2857c06a4 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -5750,6 +5750,26 @@ void cfg80211_put_bss(struct wiphy *wiphy, struct cfg80211_bss *bss);
*/
void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *bss);
+/**
+ * cfg80211_bss_iter - iterate all BSS entries
+ *
+ * This function iterates over the BSS entries associated with the given wiphy
+ * and calls the callback for the iterated BSS. The iterator function is not
+ * allowed to call functions that might modify the internal state of the BSS DB.
+ *
+ * @wiphy: the wiphy
+ * @chandef: if given, the iterator function will be called only if the channel
+ * of the currently iterated BSS is a subset of the given channel.
+ * @iter: the iterator function to call
+ * @iter_data: an argument to the iterator function
+ */
+void cfg80211_bss_iter(struct wiphy *wiphy,
+ struct cfg80211_chan_def *chandef,
+ void (*iter)(struct wiphy *wiphy,
+ struct cfg80211_bss *bss,
+ void *data),
+ void *iter_data);
+
static inline enum nl80211_bss_scan_width
cfg80211_chandef_to_scan_width(const struct cfg80211_chan_def *chandef)
{
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index f347387f195a..dc1ba21428dd 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -1974,6 +1974,27 @@ out:
}
EXPORT_SYMBOL(cfg80211_unlink_bss);
+void cfg80211_bss_iter(struct wiphy *wiphy,
+ struct cfg80211_chan_def *chandef,
+ void (*iter)(struct wiphy *wiphy,
+ struct cfg80211_bss *bss,
+ void *data),
+ void *iter_data)
+{
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+ struct cfg80211_internal_bss *bss;
+
+ spin_lock_bh(&rdev->bss_lock);
+
+ list_for_each_entry(bss, &rdev->bss_list, list) {
+ if (!chandef || cfg80211_is_sub_chan(chandef, bss->pub.channel))
+ iter(wiphy, &bss->pub, iter_data);
+ }
+
+ spin_unlock_bh(&rdev->bss_lock);
+}
+EXPORT_SYMBOL(cfg80211_bss_iter);
+
#ifdef CONFIG_CFG80211_WEXT
static struct cfg80211_registered_device *
cfg80211_get_dev_from_ifindex(struct net *net, int ifindex)