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Commit d491af19 authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville
Browse files

cfg80211: allow users to request removing a BSS 



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: default avatarJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 78c1c7e1

include/net/cfg80211.h

+11 −0
Original line number Diff line number Diff line
@@ -791,5 +791,16 @@ struct cfg80211_bss *cfg80211_get_mesh(struct wiphy *wiphy, 
				       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 */

net/wireless/scan.c

+21 −0
Original line number Diff line number Diff line
@@ -432,6 +432,27 @@ void cfg80211_put_bss(struct cfg80211_bss *pub) 
}

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,