From 6382246e895fa0ae5162de7c1e5566b9719bdd26 Mon Sep 17 00:00:00 2001 From: Emmanuel Grumbach Date: Mon, 20 Apr 2015 22:53:37 +0300 Subject: mac80211: notify the driver upon BAR Rx When we receive a BAR, this typically means that our peer doesn't hear our Block-Acks or that we can't hear its frames. Either way, it is a good indication that the link is in a bad condition. This is why it can serve as a probe to the driver. Use the event_callback callback for this. Since more events with the same data will be added in the feature, the structure that describes the data attached to the event is called in a generic name: ieee80211_ba_event. This also means that from now on, the event_callback can't sleep. Signed-off-by: Emmanuel Grumbach Signed-off-by: Johannes Berg --- net/mac80211/rx.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'net') diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index b69a071d7679..ac6bfa999416 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -2427,6 +2427,9 @@ ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames) struct { __le16 control, start_seq_num; } __packed bar_data; + struct ieee80211_event event = { + .type = BAR_RX_EVENT, + }; if (!rx->sta) return RX_DROP_MONITOR; @@ -2442,6 +2445,9 @@ ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames) return RX_DROP_MONITOR; start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4; + event.u.ba.tid = tid; + event.u.ba.ssn = start_seq_num; + event.u.ba.sta = &rx->sta->sta; /* reset session timer */ if (tid_agg_rx->timeout) @@ -2454,6 +2460,8 @@ ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames) start_seq_num, frames); spin_unlock(&tid_agg_rx->reorder_lock); + drv_event_callback(rx->local, rx->sdata, &event); + kfree_skb(skb); return RX_QUEUED; } -- cgit v1.2.3