diff mbox series

wifi: mac80211: fix get inactive time for station mode

Message ID 20220628150511.1185132-1-ih@simonwunderlich.de (mailing list archive)
State Changes Requested
Delegated to: Johannes Berg
Headers show
Series wifi: mac80211: fix get inactive time for station mode | expand

Commit Message

Issam Hamdi June 28, 2022, 3:05 p.m. UTC
In station mode, the value last_rx is not updated often.
Therefore the calculation of the inactive time will be wrong (will give
values between 1000 ms to 30000 ms).
To fix this add the update of "sta->deflink.rx_stats.last_rx" for
station mode in the response of the packets process
(ieee80211_rx_h_sta_process).

Signed-off-by: Issam Hamdi <ih@simonwunderlich.de>
---
 net/mac80211/rx.c       | 3 +++
 net/mac80211/sta_info.c | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

Comments

Johannes Berg July 1, 2022, 9:58 a.m. UTC | #1
On Tue, 2022-06-28 at 17:05 +0200, Issam Hamdi wrote:
> In station mode, the value last_rx is not updated often.
> Therefore the calculation of the inactive time will be wrong (will give
> values between 1000 ms to 30000 ms).
> To fix this add the update of "sta->deflink.rx_stats.last_rx" for
> station mode in the response of the packets process
> (ieee80211_rx_h_sta_process).

Not really sure I understand that.

> +++ b/net/mac80211/rx.c
> @@ -1756,6 +1756,9 @@ ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
>  			sta->deflink.rx_stats.last_rate = sta_stats_encode_rate(status);
>  	}
>  
> +	if (rx->sdata->vif.type == NL80211_IFTYPE_STATION)
> +		sta->deflink.rx_stats.last_rx = jiffies;

Why the interface type check? It's a per-station thing, so why would it
not apply here for other types?

>  	sinfo->inactive_time =
> -		jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta));
> +		jiffies_to_msecs(abs(jiffies - ieee80211_sta_last_active(sta)));
> 

That seems ... rather questionable.

johannes
diff mbox series

Patch

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index d017ad14d7db..6ce899b18614 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1756,6 +1756,9 @@  ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
 			sta->deflink.rx_stats.last_rate = sta_stats_encode_rate(status);
 	}
 
+	if (rx->sdata->vif.type == NL80211_IFTYPE_STATION)
+		sta->deflink.rx_stats.last_rx = jiffies;
+
 	sta->deflink.rx_stats.fragments++;
 
 	u64_stats_update_begin(&rx->sta->deflink.rx_stats.syncp);
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 014032369994..88a9f81e7083 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -2430,7 +2430,7 @@  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));
+		jiffies_to_msecs(abs(jiffies - ieee80211_sta_last_active(sta)));
 
 	if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_TX_BYTES64) |
 			       BIT_ULL(NL80211_STA_INFO_TX_BYTES)))) {