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mac80211: move TX info into skb->cb

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This patch converts mac80211 and all drivers to have transmit
information and status in skb->cb rather than allocating extra
memory for it and copying all the data around. To make it fit,
a union is used where only data that is necessary for all steps
is kept outside of the union.

A number of fixes were done by Ivo, as well as the rt2x00 part
of this patch.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
2008-05-15 12:55:29 +02:00
committed by John W. Linville
parent e24549485f
commit e039fa4a41
67 changed files with 976 additions and 1270 deletions
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18
net/mac80211/rc80211_pid_algo.c
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@@ -237,8 +237,7 @@ static void rate_control_pid_sample(struct rc_pid_info *pinfo,
}
static void rate_control_pid_tx_status(void *priv, struct net_device *dev,
struct sk_buff *skb,
struct ieee80211_tx_status *status)
struct sk_buff *skb)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
@@ -248,6 +247,7 @@ static void rate_control_pid_tx_status(void *priv, struct net_device *dev,
struct rc_pid_sta_info *spinfo;
unsigned long period;
struct ieee80211_supported_band *sband;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
rcu_read_lock();
@@ -266,28 +266,28 @@ static void rate_control_pid_tx_status(void *priv, struct net_device *dev,
/* Ignore all frames that were sent with a different rate than the rate
* we currently advise mac80211 to use. */
if (status->control.tx_rate_idx != sta->txrate_idx)
if (info->tx_rate_idx != sta->txrate_idx)
goto unlock;
spinfo = sta->rate_ctrl_priv;
spinfo->tx_num_xmit++;
#ifdef CONFIG_MAC80211_DEBUGFS
rate_control_pid_event_tx_status(&spinfo->events, status);
rate_control_pid_event_tx_status(&spinfo->events, info);
#endif
/* We count frames that totally failed to be transmitted as two bad
* frames, those that made it out but had some retries as one good and
* one bad frame. */
if (status->excessive_retries) {
if (info->status.excessive_retries) {
spinfo->tx_num_failed += 2;
spinfo->tx_num_xmit++;
} else if (status->retry_count) {
} else if (info->status.retry_count) {
spinfo->tx_num_failed++;
spinfo->tx_num_xmit++;
}
if (status->excessive_retries) {
if (info->status.excessive_retries) {
sta->tx_retry_failed++;
sta->tx_num_consecutive_failures++;
sta->tx_num_mpdu_fail++;
@@ -295,8 +295,8 @@ static void rate_control_pid_tx_status(void *priv, struct net_device *dev,
sta->tx_num_consecutive_failures = 0;
sta->tx_num_mpdu_ok++;
}
sta->tx_retry_count += status->retry_count;
sta->tx_num_mpdu_fail += status->retry_count;
sta->tx_retry_count += info->status.retry_count;
sta->tx_num_mpdu_fail += info->status.retry_count;
/* Update PID controller state. */
period = (HZ * pinfo->sampling_period + 500) / 1000;