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cfg80211: add channel switch started notification

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Add a new NL80211_CH_SWITCH_STARTED_NOTIFY message that can be sent to
the userspace when a channel switch process has started.  This allows
userspace to take action, for instance, by requesting other interfaces
to switch channel as necessary.

This patch introduces a function that allows the drivers to send this
notification.  It should be used when the driver starts processing a
channel switch initiated by a remote device (eg. when a STA receives a
CSA from the AP) and when it successfully starts a userspace-triggered
channel switch (eg. when hostapd triggers a channel swith in the AP).

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Luciano Coelho
2014-11-07 14:31:35 +02:00
committed by Johannes Berg
parent 127f10ec60
commit f8d7552e94
4 changed files with 66 additions and 3 deletions
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14
include/net/cfg80211.h
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@@ -4719,6 +4719,20 @@ bool cfg80211_reg_can_beacon(struct wiphy *wiphy,
void cfg80211_ch_switch_notify(struct net_device *dev,
struct cfg80211_chan_def *chandef);
/*
* cfg80211_ch_switch_started_notify - notify channel switch start
* @dev: the device on which the channel switch started
* @chandef: the future channel definition
* @count: the number of TBTTs until the channel switch happens
*
* Inform the userspace about the channel switch that has just
* started, so that it can take appropriate actions (eg. starting
* channel switch on other vifs), if necessary.
*/
void cfg80211_ch_switch_started_notify(struct net_device *dev,
struct cfg80211_chan_def *chandef,
u8 count);
/**
* ieee80211_operating_class_to_band - convert operating class to band
*