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authorJohannes Berg <johannes@sipsolutions.net>2009-02-27 16:33:55 -0600
committerJohn W. Linville <linville@tuxdriver.com>2009-03-05 14:39:35 -0500
commit24776cfd5559d3171054d3a7ea76d5febc54b03d (patch)
treed36c10070b18c9303b79e5bf6aee536d4c25cb45 /net/mac80211
parente79c1ba84c68de9161d541bd2bcc8ea65c89955c (diff)
downloadlinux-24776cfd5559d3171054d3a7ea76d5febc54b03d.tar.bz2
mac80211: Fix quality reporting for wireless stats
Since "mac80211/cfg80211: move iwrange handler to cfg80211", the results for link quality from "iwlist scan" and "iwconfig" commands have been very different. The results are now consistent. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Reported- and tested-by: Larry Finger <larry.finger@lwfinger.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/wext.c58
1 files changed, 39 insertions, 19 deletions
diff --git a/net/mac80211/wext.c b/net/mac80211/wext.c
index f6924fc065d3..935c63ed3dfa 100644
--- a/net/mac80211/wext.c
+++ b/net/mac80211/wext.c
@@ -886,21 +886,6 @@ static int ieee80211_ioctl_siwauth(struct net_device *dev,
return ret;
}
-static u8 ieee80211_get_wstats_flags(struct ieee80211_local *local)
-{
- u8 wstats_flags = 0;
-
- wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
- IEEE80211_HW_SIGNAL_DBM) ?
- IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
- wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
- IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
- if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
- wstats_flags |= IW_QUAL_DBM;
-
- return wstats_flags;
-}
-
/* Get wireless statistics. Called by /proc/net/wireless and by SIOCGIWSTATS */
static struct iw_statistics *ieee80211_get_wireless_stats(struct net_device *dev)
{
@@ -922,10 +907,45 @@ static struct iw_statistics *ieee80211_get_wireless_stats(struct net_device *dev
wstats->qual.noise = 0;
wstats->qual.updated = IW_QUAL_ALL_INVALID;
} else {
- wstats->qual.level = sta->last_signal;
- wstats->qual.qual = sta->last_qual;
- wstats->qual.noise = sta->last_noise;
- wstats->qual.updated = ieee80211_get_wstats_flags(local);
+ wstats->qual.updated = 0;
+ /*
+ * mirror what cfg80211 does for iwrange/scan results,
+ * otherwise userspace gets confused.
+ */
+ if (local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
+ IEEE80211_HW_SIGNAL_DBM)) {
+ wstats->qual.updated |= IW_QUAL_LEVEL_UPDATED;
+ wstats->qual.updated |= IW_QUAL_QUAL_UPDATED;
+ } else {
+ wstats->qual.updated |= IW_QUAL_LEVEL_INVALID;
+ wstats->qual.updated |= IW_QUAL_QUAL_INVALID;
+ }
+
+ if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) {
+ wstats->qual.level = sta->last_signal;
+ wstats->qual.qual = sta->last_signal;
+ } else if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
+ int sig = sta->last_signal;
+
+ wstats->qual.updated |= IW_QUAL_DBM;
+ wstats->qual.level = sig;
+ if (sig < -110)
+ sig = -110;
+ else if (sig > -40)
+ sig = -40;
+ wstats->qual.qual = sig + 110;
+ }
+
+ if (local->hw.flags & IEEE80211_HW_NOISE_DBM) {
+ /*
+ * This assumes that if driver reports noise, it also
+ * reports signal in dBm.
+ */
+ wstats->qual.noise = sta->last_noise;
+ wstats->qual.updated |= IW_QUAL_NOISE_UPDATED;
+ } else {
+ wstats->qual.updated |= IW_QUAL_NOISE_INVALID;
+ }
}
rcu_read_unlock();