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mac80211: provide race-free 64-bit traffic counters

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Make the TX bytes/packets counters race-free by keeping
them per AC so concurrent TX on queues can't cause lost
or wrong updates. This works since each station belongs
to a single interface. While at it also make the bytes
counters 64-bit.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg
2013-02-05 10:55:21 +01:00
parent 87f59c70ce
commit 560d268220
3 changed files with 25 additions and 14 deletions
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7
net/mac80211/tx.c
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@@ -991,15 +991,18 @@ static ieee80211_tx_result debug_noinline
ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
{
struct sk_buff *skb;
int ac = -1;
if (!tx->sta)
return TX_CONTINUE;
tx->sta->tx_packets++;
skb_queue_walk(&tx->skbs, skb) {
ac = skb_get_queue_mapping(skb);
tx->sta->tx_fragments++;
tx->sta->tx_bytes += skb->len;
tx->sta->tx_bytes[ac] += skb->len;
}
if (ac >= 0)
tx->sta->tx_packets[ac]++;
return TX_CONTINUE;
}