diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2013-02-05 10:55:21 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2013-03-07 14:32:18 +0100 |
| commit | 560d268220d3416a2d473bcc906ea2ccbf51e4ec (patch) | |
| tree | 4cc83a5346d70fc14ec1874d9ad5c9714b64a0a0 /net/mac80211/cfg.c | |
| parent | 87f59c70ce6d1abeaaf97594835be29f746b81a0 (diff) | |
| download | linux-560d268220d3416a2d473bcc906ea2ccbf51e4ec.tar.gz | |
mac80211: provide race-free 64-bit traffic counters
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>
Diffstat (limited to 'net/mac80211/cfg.c')
| -rw-r--r-- | net/mac80211/cfg.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 1d1ddabd89ca..61fc9116380d 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -445,12 +445,14 @@ static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo) struct ieee80211_sub_if_data *sdata = sta->sdata; struct ieee80211_local *local = sdata->local; struct timespec uptime; + u64 packets = 0; + int ac; sinfo->generation = sdata->local->sta_generation; sinfo->filled = STATION_INFO_INACTIVE_TIME | - STATION_INFO_RX_BYTES | - STATION_INFO_TX_BYTES | + STATION_INFO_RX_BYTES64 | + STATION_INFO_TX_BYTES64 | STATION_INFO_RX_PACKETS | STATION_INFO_TX_PACKETS | STATION_INFO_TX_RETRIES | @@ -467,10 +469,14 @@ static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo) sinfo->connected_time = uptime.tv_sec - sta->last_connected; sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx); + sinfo->tx_bytes = 0; + for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { + sinfo->tx_bytes += sta->tx_bytes[ac]; + packets += sta->tx_packets[ac]; + } + sinfo->tx_packets = packets; sinfo->rx_bytes = sta->rx_bytes; - sinfo->tx_bytes = sta->tx_bytes; sinfo->rx_packets = sta->rx_packets; - sinfo->tx_packets = sta->tx_packets; sinfo->tx_retries = sta->tx_retry_count; sinfo->tx_failed = sta->tx_retry_failed; sinfo->rx_dropped_misc = sta->rx_dropped; @@ -598,8 +604,8 @@ static void ieee80211_get_et_stats(struct wiphy *wiphy, data[i++] += sta->rx_fragments; \ data[i++] += sta->rx_dropped; \ \ - data[i++] += sta->tx_packets; \ - data[i++] += sta->tx_bytes; \ + data[i++] += sinfo.tx_packets; \ + data[i++] += sinfo.tx_bytes; \ data[i++] += sta->tx_fragments; \ data[i++] += sta->tx_filtered_count; \ data[i++] += sta->tx_retry_failed; \ @@ -621,13 +627,14 @@ static void ieee80211_get_et_stats(struct wiphy *wiphy, if (!(sta && !WARN_ON(sta->sdata->dev != dev))) goto do_survey; + sinfo.filled = 0; + sta_set_sinfo(sta, &sinfo); + i = 0; ADD_STA_STATS(sta); data[i++] = sta->sta_state; - sinfo.filled = 0; - sta_set_sinfo(sta, &sinfo); if (sinfo.filled & STATION_INFO_TX_BITRATE) data[i] = 100000 * |