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authorEmmanuel Grumbach <emmanuel.grumbach@intel.com>2015-04-20 22:53:37 +0300
committerJohannes Berg <johannes.berg@intel.com>2015-04-24 13:25:00 +0300
commit6382246e895fa0ae5162de7c1e5566b9719bdd26 (patch)
tree6bf4000f54b57078fe9f019f2959f4a1ae66c948 /net/mac80211
parent6e70d560ff44beddabb43d7ff39cc008e5b35536 (diff)
downloadlinux-6382246e895fa0ae5162de7c1e5566b9719bdd26.tar.xz
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 <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/rx.c8
1 files changed, 8 insertions, 0 deletions
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;
}