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authorFelix Fietkau <nbd@openwrt.org>2010-10-09 02:39:29 +0200
committerJohn W. Linville <linville@tuxdriver.com>2010-10-11 21:04:20 +0200
commit8610c29a2c9f273886b1c31ae4d92c69d4326262 (patch)
treec0424e55a67e0a2a1c7f1d72a9d807c442da5a9c
parentmac80211: temporarily disable reorder release timer (diff)
downloadlinux-8610c29a2c9f273886b1c31ae4d92c69d4326262.tar.xz
linux-8610c29a2c9f273886b1c31ae4d92c69d4326262.zip
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>
-rw-r--r--include/linux/nl80211.h15
-rw-r--r--include/net/cfg80211.h20
-rw-r--r--net/wireless/nl80211.c15
3 files changed, 50 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,
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index f920a06f363e..24d5b5869272 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -294,6 +294,11 @@ struct key_params {
*
* @SURVEY_INFO_NOISE_DBM: noise (in dBm) was filled in
* @SURVEY_INFO_IN_USE: channel is currently being used
+ * @SURVEY_INFO_CHANNEL_TIME: channel active time (in ms) was filled in
+ * @SURVEY_INFO_CHANNEL_TIME_BUSY: channel busy time was filled in
+ * @SURVEY_INFO_CHANNEL_TIME_EXT_BUSY: extension channel busy time was filled in
+ * @SURVEY_INFO_CHANNEL_TIME_RX: channel receive time was filled in
+ * @SURVEY_INFO_CHANNEL_TIME_TX: channel transmit time was filled in
*
* Used by the driver to indicate which info in &struct survey_info
* it has filled in during the get_survey().
@@ -301,6 +306,11 @@ struct key_params {
enum survey_info_flags {
SURVEY_INFO_NOISE_DBM = 1<<0,
SURVEY_INFO_IN_USE = 1<<1,
+ SURVEY_INFO_CHANNEL_TIME = 1<<2,
+ SURVEY_INFO_CHANNEL_TIME_BUSY = 1<<3,
+ SURVEY_INFO_CHANNEL_TIME_EXT_BUSY = 1<<4,
+ SURVEY_INFO_CHANNEL_TIME_RX = 1<<5,
+ SURVEY_INFO_CHANNEL_TIME_TX = 1<<6,
};
/**
@@ -310,6 +320,11 @@ enum survey_info_flags {
* @filled: bitflag of flags from &enum survey_info_flags
* @noise: channel noise in dBm. This and all following fields are
* optional
+ * @channel_time: amount of time in ms the radio spent on the channel
+ * @channel_time_busy: amount of time the primary channel was sensed busy
+ * @channel_time_ext_busy: amount of time the extension channel was sensed busy
+ * @channel_time_rx: amount of time the radio spent receiving data
+ * @channel_time_tx: amount of time the radio spent transmitting data
*
* Used by dump_survey() to report back per-channel survey information.
*
@@ -318,6 +333,11 @@ enum survey_info_flags {
*/
struct survey_info {
struct ieee80211_channel *channel;
+ u64 channel_time;
+ u64 channel_time_busy;
+ u64 channel_time_ext_busy;
+ u64 channel_time_rx;
+ u64 channel_time_tx;
u32 filled;
s8 noise;
};
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);