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authorSunil Dutt <usdutt@qti.qualcomm.com>2018-01-25 17:13:37 +0200
committerJohannes Berg <johannes.berg@intel.com>2018-01-31 12:48:30 +0100
commit5037a00992e5fcb3d8509964313565a3dab6697c (patch)
treeb300e0037876ff97b1cbd658e67e171df7793132 /net/wireless
parent6335698e24ec11e1324b916177da6721df724dd8 (diff)
nl80211: Introduce scan flags to emphasize requested scan behavior
This commit defines new scan flags (LOW_SPAN, LOW_POWER, HIGH_LATENCY) to emphasize the requested scan behavior for the driver. These flags are optional and are mutually exclusive. The implementation of the respective functionality can be driver/hardware specific. These flags can be used to control the compromise between how long a scan takes, how much power it uses, and high accurate/complete the scan is in finding the BSSs. Signed-off-by: Sunil Dutt <usdutt@qti.qualcomm.com> Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless')
-rw-r--r--net/wireless/nl80211.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index ab0c687d0c44..dd249ec9f228 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -6715,8 +6715,17 @@ nl80211_check_scan_flags(struct wiphy *wiphy, struct wireless_dev *wdev,
*flags = nla_get_u32(attrs[NL80211_ATTR_SCAN_FLAGS]);
- if ((*flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
- !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN))
+ if (((*flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
+ !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
+ ((*flags & NL80211_SCAN_FLAG_LOW_SPAN) &&
+ !wiphy_ext_feature_isset(wiphy,
+ NL80211_EXT_FEATURE_LOW_SPAN_SCAN)) ||
+ ((*flags & NL80211_SCAN_FLAG_LOW_POWER) &&
+ !wiphy_ext_feature_isset(wiphy,
+ NL80211_EXT_FEATURE_LOW_POWER_SCAN)) ||
+ ((*flags & NL80211_SCAN_FLAG_HIGH_ACCURACY) &&
+ !wiphy_ext_feature_isset(wiphy,
+ NL80211_EXT_FEATURE_HIGH_ACCURACY_SCAN)))
return -EOPNOTSUPP;
if (*flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {