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authorJouni Malinen <jouni.malinen@atheros.com>2009-05-05 20:35:14 +0300
committerJohn W. Linville <linville@tuxdriver.com>2009-05-06 15:15:04 -0400
commit4d050f1daed3babf6fcc337f862a245d31af4452 (patch)
treeea684e5168772b822fdb0bd162378fd252227f3c /net/mac80211/sta_info.h
parent2d3babd11f91501f49c6af212e6795bd8954f4d4 (diff)
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mac80211: Add a timeout for frames in the RX reorder buffer
This patch allows skbs to be released from the RX reorder buffer in case they have been there for an unexpectedly long time without us having received the missing frames before them. Previously, these frames were only released when the reorder window moved and that could take very long time unless new frames were received constantly (e.g., TCP connections could be killed more or less indefinitely). This situation should not happen very frequently, but it looks like there are some scenarious that trigger it for some reason. As such, this should be considered mostly a workaround to speed up recovery from unexpected siutation that could result in connections hanging for long periods of time. The changes here will only check for timeout situation when adding new RX frames to the reorder buffer. It does not handle all possible cases, but seems to help for most cases that could result from common network usage (e.g., TCP retrying at least couple of times). For more completely coverage, a timer could be used to periodically check whether there are any frames remaining in the reorder buffer if no new frames are received. Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/sta_info.h')
-rw-r--r--net/mac80211/sta_info.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index 31a8990..164b16c 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -88,6 +88,7 @@ struct tid_ampdu_tx {
* struct tid_ampdu_rx - TID aggregation information (Rx).
*
* @reorder_buf: buffer to reorder incoming aggregated MPDUs
+ * @reorder_time: jiffies when skb was added
* @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
* @head_seq_num: head sequence number in reordering buffer.
* @stored_mpdu_num: number of MPDUs in reordering buffer
@@ -99,6 +100,7 @@ struct tid_ampdu_tx {
*/
struct tid_ampdu_rx {
struct sk_buff **reorder_buf;
+ unsigned long *reorder_time;
struct timer_list session_timer;
u16 head_seq_num;
u16 stored_mpdu_num;