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cfg80211: add local BSS receive time to survey information 

This is useful for checking how much airtime is being used up by other
transmissions on the channel, e.g. by calculating (time_rx - time_bss_rx)
or (time_busy - time_bss_rx - time_tx)

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20190828102042.58016-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Felix Fietkau 2019-08-28 12:20:42 +02:00 committed by Johannes Berg
parent 7010998c6c
commit c8cd6e7f15
3 changed files with 11 additions and 0 deletions
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4
include/net/cfg80211.h
View File

@ -768,6 +768,7 @@ ieee80211_chandef_max_power(struct cfg80211_chan_def *chandef)
* @SURVEY_INFO_TIME_RX: receive time was filled in
* @SURVEY_INFO_TIME_TX: transmit time was filled in
* @SURVEY_INFO_TIME_SCAN: scan time was filled in
* @SURVEY_INFO_TIME_BSS_RX: local BSS receive time was filled in
*
* Used by the driver to indicate which info in &struct survey_info
* it has filled in during the get_survey().
@ -781,6 +782,7 @@ enum survey_info_flags {
SURVEY_INFO_TIME_RX = BIT(5),
SURVEY_INFO_TIME_TX = BIT(6),
SURVEY_INFO_TIME_SCAN = BIT(7),
SURVEY_INFO_TIME_BSS_RX = BIT(8),
};
/**
@ -797,6 +799,7 @@ enum survey_info_flags {
* @time_rx: amount of time the radio spent receiving data
* @time_tx: amount of time the radio spent transmitting data
* @time_scan: amount of time the radio spent for scanning
* @time_bss_rx: amount of time the radio spent receiving data on a local BSS
*
* Used by dump_survey() to report back per-channel survey information.
*
@ -811,6 +814,7 @@ struct survey_info {
u64 time_rx;
u64 time_tx;
u64 time_scan;
u64 time_bss_rx;
u32 filled;
s8 noise;
};

3
include/uapi/linux/nl80211.h
View File

@ -3870,6 +3870,8 @@ enum nl80211_user_reg_hint_type {
* @NL80211_SURVEY_INFO_TIME_SCAN: time the radio spent for scan
* (on this channel or globally)
* @NL80211_SURVEY_INFO_PAD: attribute used for padding for 64-bit alignment
* @NL80211_SURVEY_INFO_TIME_BSS_RX: amount of time the radio spent
* receiving frames destined to the local BSS
* @NL80211_SURVEY_INFO_MAX: highest survey info attribute number
* currently defined
* @__NL80211_SURVEY_INFO_AFTER_LAST: internal use
@ -3886,6 +3888,7 @@ enum nl80211_survey_info {
NL80211_SURVEY_INFO_TIME_TX,
NL80211_SURVEY_INFO_TIME_SCAN,
NL80211_SURVEY_INFO_PAD,
NL80211_SURVEY_INFO_TIME_BSS_RX,
/* keep last */
__NL80211_SURVEY_INFO_AFTER_LAST,

4
net/wireless/nl80211.c
View File

@ -8806,6 +8806,10 @@ static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_SCAN,
survey->time_scan, NL80211_SURVEY_INFO_PAD))
goto nla_put_failure;
if ((survey->filled & SURVEY_INFO_TIME_BSS_RX) &&
nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_BSS_RX,
survey->time_bss_rx, NL80211_SURVEY_INFO_PAD))
goto nla_put_failure;
nla_nest_end(msg, infoattr);