This adds TX airtime statistics to the cfg80211 station dump (to go along
with the RX info already present), and adds a new parameter to set the
airtime weight of each station. The latter allows userspace to implement
policies for different stations by varying their weights.
Signed-off-by: Toke Høiland-Jørgensen <toke@xxxxxxx>
---
include/net/cfg80211.h | 10 +++++++++-
include/uapi/linux/nl80211.h | 15 +++++++++++++++
net/wireless/nl80211.c | 29 +++++++++++++++++++++++++++++
3 files changed, 53 insertions(+), 1 deletion(-)
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 9f3ed79c39d7..91d6fc222263 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -990,6 +990,7 @@ enum station_parameters_apply_mask {
* @support_p2p_ps: information if station supports P2P PS mechanism
* @he_capa: HE capabilities of station
* @he_capa_len: the length of the HE capabilities
+ * @airtime_weight: airtime scheduler weight for this station
*/
struct station_parameters {
const u8 *supported_rates;
@@ -1019,6 +1020,7 @@ struct station_parameters {
int support_p2p_ps;
const struct ieee80211_he_cap_elem *he_capa;
u8 he_capa_len;
+ u16 airtime_weight;
};
/**
@@ -1286,6 +1288,8 @@ struct cfg80211_tid_stats {
* @rx_beacon_signal_avg: signal strength average (in dBm) for beacons received
* from this peer
* @rx_duration: aggregate PPDU duration(usecs) for all the frames from a peer
+ * @tx_duration: aggregate PPDU duration(usecs) for all the frames to a peer
+ * @airtime_weight: current airtime scheduling weight
* @pertid: per-TID statistics, see &struct cfg80211_tid_stats, using the last
* (IEEE80211_NUM_TIDS) index for MSDUs not encapsulated in QoS-MPDUs.
* Note that this doesn't use the @filled bit, but is used if non-NULL.
@@ -1332,10 +1336,12 @@ struct station_info {
u32 expected_throughput;
- u64 rx_beacon;
+ u64 tx_duration;
u64 rx_duration;
+ u64 rx_beacon;
u8 rx_beacon_signal_avg;
struct cfg80211_tid_stats *pertid;
+ u16 airtime_weight;
s8 ack_signal;
s8 avg_ack_signal;
};
@@ -2363,6 +2369,8 @@ enum wiphy_params_flags {
WIPHY_PARAM_TXQ_QUANTUM = 1 << 8,
};
+#define IEEE80211_DEFAULT_AIRTIME_WEIGHT 256
+
/**
* struct cfg80211_pmksa - PMK Security Association
*
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index cfc94178d608..3664bdc7c8c1 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -2241,6 +2241,9 @@ enum nl80211_commands {
* association request when used with NL80211_CMD_NEW_STATION). Can be set
* only if %NL80211_STA_FLAG_WME is set.
*
+ * @NL80211_ATTR_AIRTIME_WEIGHT: Station's weight when scheduled by the airtime
+ * scheduler.
+ *
* @NUM_NL80211_ATTR: total number of nl80211_attrs available
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
@@ -2682,6 +2685,8 @@ enum nl80211_attrs {
NL80211_ATTR_HE_CAPABILITY,
+ NL80211_ATTR_AIRTIME_WEIGHT,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
@@ -3051,6 +3056,9 @@ enum nl80211_sta_bss_param {
* @NL80211_STA_INFO_PAD: attribute used for padding for 64-bit alignment
* @NL80211_STA_INFO_ACK_SIGNAL: signal strength of the last ACK frame(u8, dBm)
* @NL80211_STA_INFO_ACK_SIGNAL_AVG: avg signal strength of ACK frames (s8, dBm)
+ * @NL80211_STA_INFO_TX_DURATION: aggregate PPDU duration for all frames
+ * sent to the station (u64, usec)
+ * @NL80211_STA_INFO_AIRTIME_WEIGHT: current airtime weight for station (u16)
* @__NL80211_STA_INFO_AFTER_LAST: internal
* @NL80211_STA_INFO_MAX: highest possible station info attribute
*/
@@ -3091,6 +3099,8 @@ enum nl80211_sta_info {
NL80211_STA_INFO_PAD,
NL80211_STA_INFO_ACK_SIGNAL,
NL80211_STA_INFO_ACK_SIGNAL_AVG,
+ NL80211_STA_INFO_TX_DURATION,
+ NL80211_STA_INFO_AIRTIME_WEIGHT,
/* keep last */
__NL80211_STA_INFO_AFTER_LAST,
@@ -5231,6 +5241,10 @@ enum nl80211_feature_flags {
* if this flag is not set. Ignoring this can leak clear text packets and/or
* freeze the connection.
*
+ * @NL80211_EXT_FEATURE_AIRTIME_FAIRNESS: Driver supports getting airtime
+ * fairness for transmitted packets and has enabled airtime fairness
+ * scheduling.
+ *
* @NUM_NL80211_EXT_FEATURES: number of extended features.
* @MAX_NL80211_EXT_FEATURES: highest extended feature index.
*/
@@ -5269,6 +5283,7 @@ enum nl80211_ext_feature_index {
NL80211_EXT_FEATURE_SCAN_RANDOM_SN,
NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT,
NL80211_EXT_FEATURE_CAN_REPLACE_PTK0,
+ NL80211_EXT_FEATURE_AIRTIME_FAIRNESS,
/* add new features before the definition below */
NUM_NL80211_EXT_FEATURES,
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index d5f9b5235cdd..9db19ae57716 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -430,6 +430,8 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
[NL80211_ATTR_TXQ_QUANTUM] = { .type = NLA_U32 },
[NL80211_ATTR_HE_CAPABILITY] = { .type = NLA_BINARY,
.len = NL80211_HE_MAX_CAPABILITY_LEN },
+
+ [NL80211_ATTR_AIRTIME_WEIGHT] = { .type = NLA_U16 },
};
/* policy for the key attributes */
@@ -4656,6 +4658,11 @@ static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
PUT_SINFO(PLID, plid, u16);
PUT_SINFO(PLINK_STATE, plink_state, u8);
PUT_SINFO_U64(RX_DURATION, rx_duration);
+ PUT_SINFO_U64(TX_DURATION, tx_duration);
+
+ if (wiphy_ext_feature_isset(&rdev->wiphy,
+ NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
+ PUT_SINFO(AIRTIME_WEIGHT, airtime_weight, u16);
switch (rdev->wiphy.signal_type) {
case CFG80211_SIGNAL_TYPE_MBM:
@@ -5293,6 +5300,17 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
}
+ if (info->attrs[NL80211_ATTR_AIRTIME_WEIGHT]) {
+ if (!wiphy_ext_feature_isset(&rdev->wiphy,
+ NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
+ return -EOPNOTSUPP;
+
+ params.airtime_weight =
+ nla_get_u16(info->attrs[NL80211_ATTR_AIRTIME_WEIGHT]);
+ if (!params.airtime_weight)
+ return -EINVAL;
+ }
+
/* Include parameters for TDLS peer (will check later) */
err = nl80211_set_station_tdls(info, ¶ms);
if (err)
@@ -5431,6 +5449,17 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
return -EINVAL;
}
+ if (info->attrs[NL80211_ATTR_AIRTIME_WEIGHT]) {
+ if (!wiphy_ext_feature_isset(&rdev->wiphy,
+ NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
+ return -EOPNOTSUPP;
+
+ params.airtime_weight =
+ nla_get_u16(info->attrs[NL80211_ATTR_AIRTIME_WEIGHT]);
+ if (!params.airtime_weight)
+ return -EINVAL;
+ }
+
err = nl80211_parse_sta_channel_info(info, ¶ms);
if (err)
return err;
