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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: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2009-02-10 21:25:58 +01:00 committed by John W. Linville
parent 78c1c7e109
commit d491af19db
2 changed files with 32 additions and 0 deletions
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11
include/net/cfg80211.h
View File

@ -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 */

21
net/wireless/scan.c
View File

@ -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,