cfg80211: Add airtime statistics and settings

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@toke.dk>
[rmanohar@codeaurora.org: fixed checkpatch warnings]
Signed-off-by: Rajkumar Manoharan <rmanohar@codeaurora.org>
[move airtime weight != 0 check into policy]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 5e49492d5911..a89688929b16 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -557,6 +557,7 @@ const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
         [NL80211_ATTR_PEER_MEASUREMENTS] =
                 NLA_POLICY_NESTED(NL80211_PMSR_FTM_REQ_ATTR_MAX,
                                   nl80211_pmsr_attr_policy),
+        [NL80211_ATTR_AIRTIME_WEIGHT] = NLA_POLICY_MIN(NLA_U16, 1),
 };
 
 /* policy for the key attributes */
@@ -4851,6 +4852,11 @@ 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:
@@ -5470,6 +5476,15 @@ 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])
+                params.airtime_weight =
+                        nla_get_u16(info->attrs[NL80211_ATTR_AIRTIME_WEIGHT]);
+
+        if (params.airtime_weight &&
+            !wiphy_ext_feature_isset(&rdev->wiphy,
+                                     NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
+                return -EOPNOTSUPP;
+
         /* Include parameters for TDLS peer (will check later) */
         err = nl80211_set_station_tdls(info, &params);
         if (err)
@@ -5598,6 +5613,15 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
                 params.plink_action =
                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
 
+        if (info->attrs[NL80211_ATTR_AIRTIME_WEIGHT])
+                params.airtime_weight =
+                        nla_get_u16(info->attrs[NL80211_ATTR_AIRTIME_WEIGHT]);
+
+        if (params.airtime_weight &&
+            !wiphy_ext_feature_isset(&rdev->wiphy,
+                                     NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
+                return -EOPNOTSUPP;
+
         err = nl80211_parse_sta_channel_info(info, &params);
         if (err)
                 return err;