mac80211: move beacon_loss_count into ifmgd

There's little point in keeping (and even sending to userspace)
the beacon_loss_count value per station, since it can only apply
to the AP on a managed-mode connection. Move the value to ifmgd,
advertise it only in managed mode, and remove it from ethtool as
it's available through better interfaces.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

5 files changed, 12 insertions, 14 deletions

diff --git a/net/mac80211/ethtool.c b/net/mac80211/ethtool.c
index 188faab11c24..3fbf9c308ec5 100644
--- a/net/mac80211/ethtool.c
+++ b/net/mac80211/ethtool.c
@@ -40,7 +40,7 @@ static const char ieee80211_gstrings_sta_stats[][ETH_GSTRING_LEN] = {
         "rx_duplicates", "rx_fragments", "rx_dropped",
         "tx_packets", "tx_bytes",
         "tx_filtered", "tx_retry_failed", "tx_retries",
-        "beacon_loss", "sta_state", "txrate", "rxrate", "signal",
+        "sta_state", "txrate", "rxrate", "signal",
         "channel", "noise", "ch_time", "ch_time_busy",
         "ch_time_ext_busy", "ch_time_rx", "ch_time_tx"
 };
@@ -90,7 +90,6 @@ static void ieee80211_get_stats(struct net_device *dev,
                 data[i++] += sta->tx_filtered_count;    \
                 data[i++] += sta->tx_retry_failed;      \
                 data[i++] += sta->tx_retry_count;       \
-                data[i++] += sta->beacon_loss_count;    \
         } while (0)
 
         /* For Managed stations, find the single station based on BSSID
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 056d3721148c..62f2a97cd2a6 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -503,6 +503,9 @@ struct ieee80211_if_managed {
          */
         unsigned int count_beacon_signal;
 
+        /* Number of times beacon loss was invoked. */
+        unsigned int beacon_loss_count;
+
         /*
          * Last Beacon frame signal strength average (ave_beacon_signal / 16)
          * that triggered a cqm event. 0 indicates that no event has been
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 6158db06a5b5..ded4b976bb48 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -2420,15 +2420,9 @@ static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
                 container_of(work, struct ieee80211_sub_if_data,
                              u.mgd.beacon_connection_loss_work);
         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
-        struct sta_info *sta;
 
-        if (ifmgd->associated) {
-                rcu_read_lock();
-                sta = sta_info_get(sdata, ifmgd->bssid);
-                if (sta)
-                        sta->beacon_loss_count++;
-                rcu_read_unlock();
-        }
+        if (ifmgd->associated)
+                ifmgd->beacon_loss_count++;
 
         if (ifmgd->connection_loss) {
                 sdata_info(sdata, "Connection to AP %pM lost\n",
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 7f2c4f2acadf..0b8dd1cca6d8 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -1871,8 +1871,12 @@ void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
                          BIT(NL80211_STA_INFO_STA_FLAGS) |
                          BIT(NL80211_STA_INFO_BSS_PARAM) |
                          BIT(NL80211_STA_INFO_CONNECTED_TIME) |
-                         BIT(NL80211_STA_INFO_RX_DROP_MISC) |
-                         BIT(NL80211_STA_INFO_BEACON_LOSS);
+                         BIT(NL80211_STA_INFO_RX_DROP_MISC);
+
+        if (sdata->vif.type == NL80211_IFTYPE_STATION) {
+                sinfo->beacon_loss_count = sdata->u.mgd.beacon_loss_count;
+                sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_LOSS);
+        }
 
         sinfo->connected_time = ktime_get_seconds() - sta->last_connected;
         sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
@@ -1914,7 +1918,6 @@ void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
         }
 
         sinfo->rx_dropped_misc = sta->rx_dropped;
-        sinfo->beacon_loss_count = sta->beacon_loss_count;
 
         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
             !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index 7bb5781b4ce2..3a401d40c329 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -508,7 +508,6 @@ struct sta_info {
         enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
 
         unsigned int lost_packets;
-        unsigned int beacon_loss_count;
 
         enum ieee80211_smps_mode known_smps_mode;
         const struct ieee80211_cipher_scheme *cipher_scheme;