This adds three new values to the survey results:
* BUSY - percentage of time the channel was busy
* BUSY_TX - percentage of time spent transmitting frames
* BUSY_RX - percentage of time spent receiving frames
They are defined to be a percentage of time, normalized to 255. That way they
match the Channel Utilization of the BSS Load IE of 802.11-2007, chapter
7.3.2.28, in case we want to use that later.
I admit that these three values are ath[59]k centric - it's what is available
there, and i don't know if other chipsets have similar information.
Signed-off-by: Bruno Randolf <br1@xxxxxxxxxxx>
---
include/linux/nl80211.h | 10 ++++++++++
include/net/cfg80211.h | 6 ++++++
net/wireless/nl80211.c | 9 +++++++++
3 files changed, 25 insertions(+), 0 deletions(-)
diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index f0518b0..2cc74a2 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -1400,6 +1400,13 @@ enum nl80211_reg_rule_flags {
* @__NL80211_SURVEY_INFO_INVALID: attribute number 0 is reserved
* @NL80211_SURVEY_INFO_FREQUENCY: center frequency of channel
* @NL80211_SURVEY_INFO_NOISE: noise level of channel (u8, dBm)
+ * @NL80211_SURVEY_INFO_BUSY: channel busy ratio (u8, percentage of time,
+ * normalized to 255 so it matches Channel Utilization of the BSS Load IE
+ * of 802.11-2007 chapter 7.3.2.28)
+ * @NL80211_SURVEY_INFO_BUSY_TX: percentage of time spent transmitting frames
+ * (u8, percent 0-255, see above)
+ * @NL80211_SURVEY_INFO_BUSY_RX: percentage of time spent receiving frames
+ * (u8, percent 0-255, see above)
* @NL80211_SURVEY_INFO_MAX: highest survey info attribute number
* currently defined
* @__NL80211_SURVEY_INFO_AFTER_LAST: internal use
@@ -1408,6 +1415,9 @@ enum nl80211_survey_info {
__NL80211_SURVEY_INFO_INVALID,
NL80211_SURVEY_INFO_FREQUENCY,
NL80211_SURVEY_INFO_NOISE,
+ NL80211_SURVEY_INFO_BUSY,
+ NL80211_SURVEY_INFO_BUSY_TX,
+ NL80211_SURVEY_INFO_BUSY_RX,
/* keep last */
__NL80211_SURVEY_INFO_AFTER_LAST,
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index a0613ff..e86c890 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -299,6 +299,9 @@ struct key_params {
*/
enum survey_info_flags {
SURVEY_INFO_NOISE_DBM = 1<<0,
+ SURVEY_INFO_BUSY = 1<<1,
+ SURVEY_INFO_BUSY_TX = 1<<2,
+ SURVEY_INFO_BUSY_RX = 1<<3,
};
/**
@@ -318,6 +321,9 @@ struct survey_info {
struct ieee80211_channel *channel;
u32 filled;
s8 noise;
+ u8 busy;
+ u8 busy_rx;
+ u8 busy_tx;
};
/**
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 9c84825..26062e1 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3489,6 +3489,15 @@ static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
if (survey->filled & SURVEY_INFO_NOISE_DBM)
NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
survey->noise);
+ if (survey->filled & SURVEY_INFO_BUSY)
+ NLA_PUT_U8(msg, NL80211_SURVEY_INFO_BUSY,
+ survey->busy);
+ if (survey->filled & SURVEY_INFO_BUSY_TX)
+ NLA_PUT_U8(msg, NL80211_SURVEY_INFO_BUSY_TX,
+ survey->busy_tx);
+ if (survey->filled & SURVEY_INFO_BUSY_RX)
+ NLA_PUT_U8(msg, NL80211_SURVEY_INFO_BUSY_RX,
+ survey->busy_rx);
nla_nest_end(msg, infoattr);
--
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