cfg80211: add channel utilization stats to the survey command

Using these, user space can calculate a relative channel utilization
with arbitrary intervals by regularly taking snapshots of the survey
results.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 882dc921103b..c506241f8637 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3153,6 +3153,21 @@ static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
                             survey->noise);
         if (survey->filled & SURVEY_INFO_IN_USE)
                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
+        if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
+                NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
+                            survey->channel_time);
+        if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
+                NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
+                            survey->channel_time_busy);
+        if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
+                NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
+                            survey->channel_time_ext_busy);
+        if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
+                NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
+                            survey->channel_time_rx);
+        if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
+                NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
+                            survey->channel_time_tx);
 
         nla_nest_end(msg, infoattr);