struct ieee80211_hdr *hdr;
struct ieee80211_sub_if_data *sdata;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-
int hdrlen, tid;
u8 *qc, *state;
+ bool queued = false;
memset(tx, 0, sizeof(*tx));
tx->skb = skb;
*/
}
+ /*
+ * If this flag is set to true anywhere, and we get here,
+ * we are doing the needed processing, so remove the flag
+ * now.
+ */
+ info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
+
hdr = (struct ieee80211_hdr *) skb->data;
tx->sta = sta_info_get(local, hdr->addr1);
- if (tx->sta && ieee80211_is_data_qos(hdr->frame_control)) {
+ if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
+ (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)) {
unsigned long flags;
+ struct tid_ampdu_tx *tid_tx;
+
qc = ieee80211_get_qos_ctl(hdr);
tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
spin_lock_irqsave(&tx->sta->lock, flags);
+ /*
+ * XXX: This spinlock could be fairly expensive, but see the
+ * comment in agg-tx.c:ieee80211_agg_tx_operational().
+ * One way to solve this would be to do something RCU-like
+ * for managing the tid_tx struct and using atomic bitops
+ * for the actual state -- by introducing an actual
+ * 'operational' bit that would be possible. It would
+ * require changing ieee80211_agg_tx_operational() to
+ * set that bit, and changing the way tid_tx is managed
+ * everywhere, including races between that bit and
+ * tid_tx going away (tid_tx being added can be easily
+ * committed to memory before the 'operational' bit).
+ */
+ tid_tx = tx->sta->ampdu_mlme.tid_tx[tid];
state = &tx->sta->ampdu_mlme.tid_state_tx[tid];
- if (*state == HT_AGG_STATE_OPERATIONAL)
+ if (*state == HT_AGG_STATE_OPERATIONAL) {
info->flags |= IEEE80211_TX_CTL_AMPDU;
+ } else if (*state != HT_AGG_STATE_IDLE) {
+ /* in progress */
+ queued = true;
+ info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
+ __skb_queue_tail(&tid_tx->pending, skb);
+ }
spin_unlock_irqrestore(&tx->sta->lock, flags);
+
+ if (unlikely(queued))
+ return TX_QUEUED;
}
if (is_multicast_ether_addr(hdr->addr1)) {
}
if (unlikely(!dev))
return -ENODEV;
- /* initialises tx with control */
+ /*
+ * initialises tx with control
+ *
+ * return value is safe to ignore here because this function
+ * can only be invoked for multicast frames
+ *
+ * XXX: clean up
+ */
__ieee80211_tx_prepare(tx, skb, dev);
dev_put(dev);
return 0;
return 0;
}
-static int ieee80211_tx(struct net_device *dev, struct sk_buff *skb)
+static void ieee80211_tx(struct net_device *dev, struct sk_buff *skb,
+ bool txpending)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct sta_info *sta;
queue = skb_get_queue_mapping(skb);
- WARN_ON(!skb_queue_empty(&local->pending[queue]));
+ WARN_ON(!txpending && !skb_queue_empty(&local->pending[queue]));
if (unlikely(skb->len < 10)) {
dev_kfree_skb(skb);
- return 0;
+ return;
}
rcu_read_lock();
/* initialises tx */
res_prepare = __ieee80211_tx_prepare(&tx, skb, dev);
- if (res_prepare == TX_DROP) {
+ if (unlikely(res_prepare == TX_DROP)) {
dev_kfree_skb(skb);
rcu_read_unlock();
- return 0;
+ return;
+ } else if (unlikely(res_prepare == TX_QUEUED)) {
+ rcu_read_unlock();
+ return;
}
sta = tx.sta;
do {
next = skb->next;
skb->next = NULL;
- skb_queue_tail(&local->pending[queue], skb);
+ if (unlikely(txpending))
+ skb_queue_head(&local->pending[queue],
+ skb);
+ else
+ skb_queue_tail(&local->pending[queue],
+ skb);
} while ((skb = next));
/*
}
out:
rcu_read_unlock();
- return 0;
+ return;
drop:
rcu_read_unlock();
dev_kfree_skb(skb);
skb = next;
}
- return 0;
}
/* device xmit handlers */
FOUND_SDATA,
UNKNOWN_ADDRESS,
} monitor_iface = NOT_MONITOR;
- int ret;
if (skb->iif)
odev = dev_get_by_index(&init_net, skb->iif);
"originating device\n", dev->name);
#endif
dev_kfree_skb(skb);
- return 0;
+ return NETDEV_TX_OK;
}
if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
else
if (mesh_nexthop_lookup(skb, osdata)) {
dev_put(odev);
- return 0;
+ return NETDEV_TX_OK;
}
if (memcmp(odev->dev_addr, hdr->addr4, ETH_ALEN) != 0)
IEEE80211_IFSTA_MESH_CTR_INC(&osdata->u.mesh,
if (ieee80211_skb_resize(osdata->local, skb, headroom, may_encrypt)) {
dev_kfree_skb(skb);
dev_put(odev);
- return 0;
+ return NETDEV_TX_OK;
}
if (osdata->vif.type == NL80211_IFTYPE_AP_VLAN)
u.ap);
if (likely(monitor_iface != UNKNOWN_ADDRESS))
info->control.vif = &osdata->vif;
- ret = ieee80211_tx(odev, skb);
+
+ ieee80211_tx(odev, skb, false);
dev_put(odev);
- return ret;
+ return NETDEV_TX_OK;
}
int ieee80211_monitor_start_xmit(struct sk_buff *skb,
skb_queue_purge(&local->pending[i]);
}
+static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
+ struct sk_buff *skb)
+{
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_sub_if_data *sdata;
+ struct sta_info *sta;
+ struct ieee80211_hdr *hdr;
+ struct net_device *dev;
+ int ret;
+ bool result = true;
+
+ /* does interface still exist? */
+ dev = dev_get_by_index(&init_net, skb->iif);
+ if (!dev) {
+ dev_kfree_skb(skb);
+ return true;
+ }
+
+ /* validate info->control.vif against skb->iif */
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+ sdata = container_of(sdata->bss,
+ struct ieee80211_sub_if_data,
+ u.ap);
+
+ if (unlikely(info->control.vif && info->control.vif != &sdata->vif)) {
+ dev_kfree_skb(skb);
+ result = true;
+ goto out;
+ }
+
+ if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
+ ieee80211_tx(dev, skb, true);
+ } else {
+ hdr = (struct ieee80211_hdr *)skb->data;
+ sta = sta_info_get(local, hdr->addr1);
+
+ ret = __ieee80211_tx(local, &skb, sta);
+ if (ret != IEEE80211_TX_OK)
+ result = false;
+ }
+
+ out:
+ dev_put(dev);
+
+ return result;
+}
+
/*
* Transmit all pending packets. Called from tasklet, locks master device
* TX lock so that no new packets can come in.
{
struct ieee80211_local *local = (struct ieee80211_local *)data;
struct net_device *dev = local->mdev;
- struct ieee80211_hdr *hdr;
unsigned long flags;
- int i, ret;
+ int i;
bool next;
rcu_read_lock();
while (!skb_queue_empty(&local->pending[i])) {
struct sk_buff *skb = skb_dequeue(&local->pending[i]);
- struct sta_info *sta;
-
- hdr = (struct ieee80211_hdr *)skb->data;
- sta = sta_info_get(local, hdr->addr1);
- ret = __ieee80211_tx(local, &skb, sta);
- if (ret != IEEE80211_TX_OK) {
+ if (!ieee80211_tx_pending_skb(local, skb)) {
skb_queue_head(&local->pending[i], skb);
break;
}
projects / linux-2.6-omap-h63xx.git / blobdiff