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/include/linux/nl80211.h b/include/linux/nl80211.h
index c08709fe36fc..0edb2566c14c 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -1413,6 +1413,16 @@ enum nl80211_reg_rule_flags {
  * @NL80211_SURVEY_INFO_FREQUENCY: center frequency of channel
  * @NL80211_SURVEY_INFO_NOISE: noise level of channel (u8, dBm)
  * @NL80211_SURVEY_INFO_IN_USE: channel is currently being used
+ * @NL80211_SURVEY_INFO_CHANNEL_TIME: amount of time (in ms) that the radio
+ *      spent on this channel
+ * @NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY: amount of the time the primary
+ *      channel was sensed busy (either due to activity or energy detect)
+ * @NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY: amount of time the extension
+ *      channel was sensed busy
+ * @NL80211_SURVEY_INFO_CHANNEL_TIME_RX: amount of time the radio spent
+ *      receiving data
+ * @NL80211_SURVEY_INFO_CHANNEL_TIME_TX: amount of time the radio spent
+ *      transmitting data
  * @NL80211_SURVEY_INFO_MAX: highest survey info attribute number
  *      currently defined
  * @__NL80211_SURVEY_INFO_AFTER_LAST: internal use
@@ -1422,6 +1432,11 @@ enum nl80211_survey_info {
         NL80211_SURVEY_INFO_FREQUENCY,
         NL80211_SURVEY_INFO_NOISE,
         NL80211_SURVEY_INFO_IN_USE,
+        NL80211_SURVEY_INFO_CHANNEL_TIME,
+        NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
+        NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
+        NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
+        NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
 
         /* keep last */
         __NL80211_SURVEY_INFO_AFTER_LAST,