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mac80211: use RCU for TX aggregation

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Currently we allocate some memory for each TX
aggregation session and additionally keep a
state bitmap indicating the state it is in.
By using RCU to protect the pointer, moving
the state into the structure and some locking
trickery we can avoid locking when the TX agg
session is fully operational.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
2010-06-10 10:21:39 +02:00
committed by John W. Linville
parent a87f736d94
commit a622ab72b4
8 changed files with 206 additions and 177 deletions
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8
net/mac80211/debugfs_sta.c
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@@ -134,15 +134,15 @@ static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
sta->ampdu_mlme.tid_rx[i]->ssn : 0);
p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x",
sta->ampdu_mlme.tid_state_tx[i]);
!!sta->ampdu_mlme.tid_tx[i]);
p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
sta->ampdu_mlme.tid_state_tx[i] ?
sta->ampdu_mlme.tid_tx[i] ?
sta->ampdu_mlme.tid_tx[i]->dialog_token : 0);
p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
sta->ampdu_mlme.tid_state_tx[i] ?
sta->ampdu_mlme.tid_tx[i] ?
sta->ampdu_mlme.tid_tx[i]->ssn : 0);
p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
sta->ampdu_mlme.tid_state_tx[i] ?
sta->ampdu_mlme.tid_tx[i] ?
skb_queue_len(&sta->ampdu_mlme.tid_tx[i]->pending) : 0);
p += scnprintf(p, sizeof(buf) + buf - p, "\n");
}