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mac80211: add single function calling tx handlers 

This modifies mac80211 to only have a single function calling the
TX handlers rather than them being invoked in multiple places.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2008-06-20 01:22:30 +02:00 committed by John W. Linville
parent 9965183a78
commit 97b045d62b
1 changed files with 40 additions and 42 deletions
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82
net/mac80211/tx.c
View File

@ -1083,13 +1083,46 @@ static int __ieee80211_tx(struct ieee80211_local *local, struct sk_buff *skb,
return IEEE80211_TX_OK;
}
/*
* Invoke TX handlers, return 0 on success and non-zero if the
* frame was dropped or queued.
*/
static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
{
struct ieee80211_local *local = tx->local;
struct sk_buff *skb = tx->skb;
ieee80211_tx_handler *handler;
ieee80211_tx_result res = TX_DROP;
int i;
for (handler = ieee80211_tx_handlers; *handler != NULL; handler++) {
res = (*handler)(tx);
if (res != TX_CONTINUE)
break;
}
if (unlikely(res == TX_DROP)) {
I802_DEBUG_INC(local->tx_handlers_drop);
dev_kfree_skb(skb);
for (i = 0; i < tx->num_extra_frag; i++)
if (tx->extra_frag[i])
dev_kfree_skb(tx->extra_frag[i]);
kfree(tx->extra_frag);
return -1;
} else if (unlikely(res == TX_QUEUED)) {
I802_DEBUG_INC(local->tx_handlers_queued);
return -1;
}
return 0;
}
static int ieee80211_tx(struct net_device *dev, struct sk_buff *skb)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct sta_info *sta;
ieee80211_tx_handler *handler;
struct ieee80211_tx_data tx;
ieee80211_tx_result res = TX_DROP, res_prepare;
ieee80211_tx_result res_prepare;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
int ret, i;
u16 queue;
@ -1118,26 +1151,8 @@ static int ieee80211_tx(struct net_device *dev, struct sk_buff *skb)
tx.channel = local->hw.conf.channel;
info->band = tx.channel->band;
for (handler = ieee80211_tx_handlers; *handler != NULL;
handler++) {
res = (*handler)(&tx);
if (res != TX_CONTINUE)
break;
}
if (WARN_ON(tx.skb != skb))
goto drop;
if (unlikely(res == TX_DROP)) {
I802_DEBUG_INC(local->tx_handlers_drop);
goto drop;
}
if (unlikely(res == TX_QUEUED)) {
I802_DEBUG_INC(local->tx_handlers_queued);
rcu_read_unlock();
return 0;
}
if (invoke_tx_handlers(&tx))
goto out;
if (tx.extra_frag) {
for (i = 0; i < tx.num_extra_frag; i++) {
@ -1198,6 +1213,7 @@ retry:
store->last_frag_rate_ctrl_probe =
!!(tx.flags & IEEE80211_TX_PROBE_LAST_FRAG);
}
out:
rcu_read_unlock();
return 0;
@ -1948,9 +1964,7 @@ ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
struct ieee80211_local *local = hw_to_local(hw);
struct sk_buff *skb = NULL;
struct sta_info *sta;
ieee80211_tx_handler *handler;
struct ieee80211_tx_data tx;
ieee80211_tx_result res = TX_DROP;
struct net_device *bdev;
struct ieee80211_sub_if_data *sdata;
struct ieee80211_if_ap *bss = NULL;
@ -2001,25 +2015,9 @@ ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
tx.channel = local->hw.conf.channel;
info->band = tx.channel->band;
for (handler = ieee80211_tx_handlers; *handler != NULL; handler++) {
res = (*handler)(&tx);
if (res == TX_DROP || res == TX_QUEUED)
break;
}
if (WARN_ON(tx.skb != skb))
res = TX_DROP;
if (res == TX_DROP) {
I802_DEBUG_INC(local->tx_handlers_drop);
dev_kfree_skb(skb);
if (invoke_tx_handlers(&tx))
skb = NULL;
} else if (res == TX_QUEUED) {
I802_DEBUG_INC(local->tx_handlers_queued);
skb = NULL;
}
out:
out:
rcu_read_unlock();
return skb;