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Commit 4770c8f9 authored by Ilan Peer's avatar Ilan Peer Committed by Johannes Berg
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cfg80211: Add a function to iterate all BSS entries 



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: default avatarIlan Peer <ilan.peer@intel.com>
Signed-off-by: default avatarLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent a0de1ca3

include/net/cfg80211.h

+20 −0
Original line number Diff line number Diff line
@@ -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)

{

net/wireless/scan.c

+21 −0
Original line number Diff line number Diff line
@@ -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)