mac80211: add assoc-at support

Report timestamp for when sta becomes associated.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Link: https://lore.kernel.org/r/20190809180001.26393-2-greearb@candelatech.com
[fix ktime_get_boot_ns() to ktime_get_boottime_ns(), assoc_at type to u64]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

2 files changed, 5 insertions, 0 deletions

diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index fb6614f57cbc..df553070206c 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -1961,6 +1961,7 @@ int sta_info_move_state(struct sta_info *sta,
         case IEEE80211_STA_ASSOC:
                 if (sta->sta_state == IEEE80211_STA_AUTH) {
                         set_bit(WLAN_STA_ASSOC, &sta->_flags);
+                        sta->assoc_at = ktime_get_boottime_ns();
                         ieee80211_recalc_min_chandef(sta->sdata);
                         if (!sta->sta.support_p2p_ps)
                                 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
@@ -2190,6 +2191,7 @@ void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
                          BIT_ULL(NL80211_STA_INFO_STA_FLAGS) |
                          BIT_ULL(NL80211_STA_INFO_BSS_PARAM) |
                          BIT_ULL(NL80211_STA_INFO_CONNECTED_TIME) |
+                         BIT_ULL(NL80211_STA_INFO_ASSOC_AT_BOOTTIME) |
                          BIT_ULL(NL80211_STA_INFO_RX_DROP_MISC);
 
         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
@@ -2198,6 +2200,7 @@ void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
         }
 
         sinfo->connected_time = ktime_get_seconds() - sta->last_connected;
+        sinfo->assoc_at = sta->assoc_at;
         sinfo->inactive_time =
                 jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta));
 
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index 3260d4234920..369c2dddce52 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -466,6 +466,7 @@ struct ieee80211_sta_rx_stats {
  *      the station when it leaves powersave or polls for frames
  * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
  * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on
+ * @assoc_at: clock boottime (in ns) of last association
  * @last_connected: time (in seconds) when a station got connected
  * @last_seq_ctrl: last received seq/frag number from this STA (per TID
  *      plus one for non-QoS frames)
@@ -562,6 +563,7 @@ struct sta_info {
         unsigned long driver_buffered_tids;
         unsigned long txq_buffered_tids;
 
+        u64 assoc_at;
         long last_connected;
 
         /* Updated from RX path only, no locking requirements */