local = sta->local;
+ cancel_work_sync(&sta->drv_unblock_wk);
+
rate_control_remove_sta_debugfs(sta);
ieee80211_sta_debugfs_remove(sta);
rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta);
}
+static void sta_unblock(struct work_struct *wk)
+{
+ struct sta_info *sta;
+
+ sta = container_of(wk, struct sta_info, drv_unblock_wk);
+
+ if (sta->dead)
+ return;
+
+ if (!test_sta_flags(sta, WLAN_STA_PS_STA))
+ ieee80211_sta_ps_deliver_wakeup(sta);
+ else if (test_and_clear_sta_flags(sta, WLAN_STA_PSPOLL))
+ ieee80211_sta_ps_deliver_poll_response(sta);
+}
+
struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
u8 *addr, gfp_t gfp)
{
spin_lock_init(&sta->lock);
spin_lock_init(&sta->flaglock);
+ INIT_WORK(&sta->drv_unblock_wk, sta_unblock);
memcpy(sta->sta.addr, addr, ETH_ALEN);
sta->local = local;
}
list_del(&(*sta)->list);
+ (*sta)->dead = true;
- if (test_and_clear_sta_flags(*sta, WLAN_STA_PS)) {
+ if (test_and_clear_sta_flags(*sta,
+ WLAN_STA_PS_STA | WLAN_STA_PS_DRIVER)) {
BUG_ON(!sdata->bss);
atomic_dec(&sdata->bss->num_sta_ps);
local->num_sta--;
local->sta_generation++;
+ if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+ rcu_assign_pointer(sdata->u.vlan.sta, NULL);
+
if (local->ops->sta_notify) {
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
sdata = container_of(sdata->bss,
sta_info_destroy(sta);
}
-struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_hw *hw,
- const u8 *addr)
+struct ieee80211_sta *ieee80211_find_sta_by_hw(struct ieee80211_hw *hw,
+ const u8 *addr)
{
struct sta_info *sta = sta_info_get(hw_to_local(hw), addr);
return NULL;
return &sta->sta;
}
+EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_hw);
+
+struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
+ const u8 *addr)
+{
+ struct ieee80211_sub_if_data *sdata;
+
+ if (!vif)
+ return NULL;
+
+ sdata = vif_to_sdata(vif);
+
+ return ieee80211_find_sta_by_hw(&sdata->local->hw, addr);
+}
EXPORT_SYMBOL(ieee80211_find_sta);
+
+/* powersave support code */
+void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
+{
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
+ struct ieee80211_local *local = sdata->local;
+ int sent, buffered;
+
+ drv_sta_notify(local, &sdata->vif, STA_NOTIFY_AWAKE, &sta->sta);
+
+ if (!skb_queue_empty(&sta->ps_tx_buf))
+ sta_info_clear_tim_bit(sta);
+
+ /* Send all buffered frames to the station */
+ sent = ieee80211_add_pending_skbs(local, &sta->tx_filtered);
+ buffered = ieee80211_add_pending_skbs(local, &sta->ps_tx_buf);
+ sent += buffered;
+ local->total_ps_buffered -= buffered;
+
+#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
+ printk(KERN_DEBUG "%s: STA %pM aid %d sending %d filtered/%d PS frames "
+ "since STA not sleeping anymore\n", sdata->dev->name,
+ sta->sta.addr, sta->sta.aid, sent - buffered, buffered);
+#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
+}
+
+void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
+{
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
+ struct ieee80211_local *local = sdata->local;
+ struct sk_buff *skb;
+ int no_pending_pkts;
+
+ skb = skb_dequeue(&sta->tx_filtered);
+ if (!skb) {
+ skb = skb_dequeue(&sta->ps_tx_buf);
+ if (skb)
+ local->total_ps_buffered--;
+ }
+ no_pending_pkts = skb_queue_empty(&sta->tx_filtered) &&
+ skb_queue_empty(&sta->ps_tx_buf);
+
+ if (skb) {
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_hdr *hdr =
+ (struct ieee80211_hdr *) skb->data;
+
+ /*
+ * Tell TX path to send this frame even though the STA may
+ * still remain is PS mode after this frame exchange.
+ */
+ info->flags |= IEEE80211_TX_CTL_PSPOLL_RESPONSE;
+
+#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
+ printk(KERN_DEBUG "STA %pM aid %d: PS Poll (entries after %d)\n",
+ sta->sta.addr, sta->sta.aid,
+ skb_queue_len(&sta->ps_tx_buf));
+#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
+
+ /* Use MoreData flag to indicate whether there are more
+ * buffered frames for this STA */
+ if (no_pending_pkts)
+ hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
+ else
+ hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA);
+
+ ieee80211_add_pending_skb(local, skb);
+
+ if (no_pending_pkts)
+ sta_info_clear_tim_bit(sta);
+#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
+ } else {
+ /*
+ * FIXME: This can be the result of a race condition between
+ * us expiring a frame and the station polling for it.
+ * Should we send it a null-func frame indicating we
+ * have nothing buffered for it?
+ */
+ printk(KERN_DEBUG "%s: STA %pM sent PS Poll even "
+ "though there are no buffered frames for it\n",
+ sdata->dev->name, sta->sta.addr);
+#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
+ }
+}
+
+void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
+ struct ieee80211_sta *pubsta, bool block)
+{
+ struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
+
+ if (block)
+ set_sta_flags(sta, WLAN_STA_PS_DRIVER);
+ else
+ ieee80211_queue_work(hw, &sta->drv_unblock_wk);
+}
+EXPORT_SYMBOL(ieee80211_sta_block_awake);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff