From 15d6030b4bec618742b8b9ccae9209c8f9e4a916 Mon Sep 17 00:00:00 2001 From: Sam Leffler Date: Thu, 11 Oct 2012 21:03:34 -0700 Subject: cfg80211: add support for flushing old scan results Add an NL80211_SCAN_FLAG_FLUSH flag that causes old bss cache entries to be flushed on scan completion. This is useful for collecting guaranteed fresh scan/survey result (e.g. on resume). For normal scan, flushing only happens on successful completion of a scan; i.e. it does not happen if the scan is aborted. For scheduled scan, previous scan results are flushed everytime when we get new scan results. This feature is enabled by default. Drivers can disable it by unsetting the NL80211_FEATURE_SCAN_FLUSH flag. Signed-off-by: Sam Leffler Tested-by: Amitkumar Karwar Signed-off-by: Amitkumar Karwar Signed-off-by: Bing Zhao [invert polarity of feature flag to account for old kernels] Signed-off-by: Johannes Berg --- include/net/cfg80211.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/net/cfg80211.h') diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index d95da8f..aa0e4a1 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -1005,6 +1005,7 @@ struct cfg80211_ssid { * @flags: bit field of flags controlling operation * @rates: bitmap of rates to advertise for each band * @wiphy: the wiphy this was for + * @scan_start: time (in jiffies) when the scan started * @wdev: the wireless device to scan for * @aborted: (internal) scan request was notified as aborted * @no_cck: used to send probe requests at non CCK rate in 2GHz band @@ -1023,6 +1024,7 @@ struct cfg80211_scan_request { /* internal */ struct wiphy *wiphy; + unsigned long scan_start; bool aborted; bool no_cck; @@ -1074,6 +1076,7 @@ struct cfg80211_sched_scan_request { /* internal */ struct wiphy *wiphy; struct net_device *dev; + unsigned long scan_start; /* keep last */ struct ieee80211_channel *channels[0]; -- cgit v1.1