This patch introduces cfg80211_unlink_bss, a function to
allow a driver to remove a BSS from the internal list and
make it not show up in scan results any more -- this is
to be used when the driver detects that the BSS is no
longer available.
Signed-off-by: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
---
include/net/cfg80211.h | 11 +++++++++++
net/wireless/scan.c | 21 +++++++++++++++++++++
2 files changed, 32 insertions(+)
--- wireless-testing.orig/include/net/cfg80211.h 2009-02-10 20:59:37.000000000 +0100
+++ wireless-testing/include/net/cfg80211.h 2009-02-10 20:59:37.000000000 +0100
@@ -791,5 +791,16 @@ struct cfg80211_bss *cfg80211_get_mesh(s
const u8 *meshid, size_t meshidlen,
const u8 *meshcfg);
void cfg80211_put_bss(struct cfg80211_bss *bss);
+/**
+ * cfg80211_unlink_bss - unlink BSS from internal data structures
+ * @wiphy: the wiphy
+ * @bss: the bss to remove
+ *
+ * This function removes the given BSS from the internal data structures
+ * thereby making it no longer show up in scan results etc. Use this
+ * function when you detect a BSS is gone. Normally BSSes will also time
+ * out, so it is not necessary to use this function at all.
+ */
+void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *bss);
#endif /* __NET_CFG80211_H */
--- wireless-testing.orig/net/wireless/scan.c 2009-02-10 20:59:37.000000000 +0100
+++ wireless-testing/net/wireless/scan.c 2009-02-10 20:59:37.000000000 +0100
@@ -432,6 +432,27 @@ void cfg80211_put_bss(struct cfg80211_bs
}
EXPORT_SYMBOL(cfg80211_put_bss);
+void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *pub)
+{
+ struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy);
+ struct cfg80211_internal_bss *bss;
+
+ if (WARN_ON(!pub))
+ return;
+
+ bss = container_of(pub, struct cfg80211_internal_bss, pub);
+
+ spin_lock_bh(&dev->bss_lock);
+
+ list_del(&bss->list);
+ rb_erase(&bss->rbn, &dev->bss_tree);
+
+ spin_unlock_bh(&dev->bss_lock);
+
+ kref_put(&bss->ref, bss_release);
+}
+EXPORT_SYMBOL(cfg80211_unlink_bss);
+
#ifdef CONFIG_WIRELESS_EXT
int cfg80211_wext_siwscan(struct net_device *dev,
struct iw_request_info *info,
--
--
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