From: Ilan Peer <ilan.peer@xxxxxxxxx>
Add a function that iterates over the BSS entries associated with a
given wiphy and calls a callback for each iterated BSS. This can be
used by drivers in various ways, e.g., to evaluate some property for
all the BSSs in the medium.
Signed-off-by: Ilan Peer <ilan.peer@xxxxxxxxx>
Signed-off-by: Luca Coelho <luciano.coelho@xxxxxxxxx>
---
include/net/cfg80211.h | 20 ++++++++++++++++++++
net/wireless/scan.c | 21 +++++++++++++++++++++
2 files changed, 41 insertions(+)
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index c19687833493..d5c1cfef443a 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -5721,6 +5721,26 @@ 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 2ea268ef1c43..d66e6d4b7555 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -1974,6 +1974,27 @@ void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *pub)
}
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)
--
2.20.1
