#include <net/mac80211.h>
#include "ieee80211_i.h"
-#include "ieee80211_rate.h"
+#include "rate.h"
#include "sta_info.h"
#include "debugfs_sta.h"
#include "mesh.h"
*
* In order to remove a STA info structure, the caller needs to first
* unlink it (sta_info_unlink()) from the list and hash tables and
- * then destroy it while holding the RTNL; sta_info_destroy() will wait
- * for an RCU grace period to elapse before actually freeing it. Due to
- * the pinning and the possibility of multiple callers trying to remove
- * the same STA info at the same time, sta_info_unlink() can clear the
- * STA info pointer it is passed to indicate that the STA info is owned
- * by somebody else now.
+ * then destroy it; sta_info_destroy() will wait for an RCU grace period
+ * to elapse before actually freeing it. Due to the pinning and the
+ * possibility of multiple callers trying to remove the same STA info at
+ * the same time, sta_info_unlink() can clear the STA info pointer it is
+ * passed to indicate that the STA info is owned by somebody else now.
*
* If sta_info_unlink() did not clear the pointer then the caller owns
* the STA info structure now and is responsible of destroying it with
- * a call to sta_info_destroy(), not before RCU synchronisation, of
- * course. Note that sta_info_destroy() must be protected by the RTNL.
+ * a call to sta_info_destroy().
*
* In all other cases, there is no concept of ownership on a STA entry,
* each structure is owned by the global hash table/list until it is
{
struct sta_info *s;
- s = local->sta_hash[STA_HASH(sta->addr)];
+ s = local->sta_hash[STA_HASH(sta->sta.addr)];
if (!s)
return -ENOENT;
if (s == sta) {
- rcu_assign_pointer(local->sta_hash[STA_HASH(sta->addr)],
+ rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)],
s->hnext);
return 0;
}
}
/* protected by RCU */
-static struct sta_info *__sta_info_find(struct ieee80211_local *local,
- u8 *addr)
+struct sta_info *sta_info_get(struct ieee80211_local *local, const u8 *addr)
{
struct sta_info *sta;
sta = rcu_dereference(local->sta_hash[STA_HASH(addr)]);
while (sta) {
- if (compare_ether_addr(sta->addr, addr) == 0)
+ if (memcmp(sta->sta.addr, addr, ETH_ALEN) == 0)
break;
sta = rcu_dereference(sta->hnext);
}
return sta;
}
-struct sta_info *sta_info_get(struct ieee80211_local *local, u8 *addr)
-{
- return __sta_info_find(local, addr);
-}
-EXPORT_SYMBOL(sta_info_get);
-
struct sta_info *sta_info_get_by_idx(struct ieee80211_local *local, int idx,
struct net_device *dev)
{
/**
* __sta_info_free - internal STA free helper
*
+ * @local: pointer to the global information
* @sta: STA info to free
*
* This function must undo everything done by sta_info_alloc()
static void __sta_info_free(struct ieee80211_local *local,
struct sta_info *sta)
{
- DECLARE_MAC_BUF(mbuf);
-
- rate_control_free_sta(sta->rate_ctrl, sta->rate_ctrl_priv);
+ rate_control_free_sta(sta);
rate_control_put(sta->rate_ctrl);
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- printk(KERN_DEBUG "%s: Destroyed STA %s\n",
- wiphy_name(local->hw.wiphy), print_mac(mbuf, sta->addr));
+ printk(KERN_DEBUG "%s: Destroyed STA %pM\n",
+ wiphy_name(local->hw.wiphy), sta->sta.addr);
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
kfree(sta);
struct sk_buff *skb;
int i;
- ASSERT_RTNL();
might_sleep();
if (!sta)
mesh_plink_deactivate(sta);
#endif
- if (sta->key) {
- /*
- * NOTE: This will call synchronize_rcu() internally to
- * make sure no key references can be in use. We rely on
- * that when we take this branch to make sure nobody can
- * reference this STA struct any longer!
- */
- ieee80211_key_free(sta->key);
- WARN_ON(sta->key);
- } else {
- /*
- * Make sure that nobody can reference this STA struct
- * any longer.
- */
- synchronize_rcu();
- }
+ /*
+ * We have only unlinked the key, and actually destroying it
+ * may mean it is removed from hardware which requires that
+ * the key->sta pointer is still valid, so flush the key todo
+ * list here.
+ *
+ * ieee80211_key_todo() will synchronize_rcu() so after this
+ * nothing can reference this sta struct any more.
+ */
+ ieee80211_key_todo();
#ifdef CONFIG_MAC80211_MESH
if (ieee80211_vif_is_mesh(&sta->sdata->vif))
dev_kfree_skb_any(skb);
for (i = 0; i < STA_TID_NUM; i++) {
- spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
+ spin_lock_bh(&sta->lock);
if (sta->ampdu_mlme.tid_rx[i])
del_timer_sync(&sta->ampdu_mlme.tid_rx[i]->session_timer);
- spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
- spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
if (sta->ampdu_mlme.tid_tx[i])
del_timer_sync(&sta->ampdu_mlme.tid_tx[i]->addba_resp_timer);
- spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
+ spin_unlock_bh(&sta->lock);
}
__sta_info_free(local, sta);
static void sta_info_hash_add(struct ieee80211_local *local,
struct sta_info *sta)
{
- sta->hnext = local->sta_hash[STA_HASH(sta->addr)];
- rcu_assign_pointer(local->sta_hash[STA_HASH(sta->addr)], sta);
+ sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)];
+ rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta);
}
struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
struct ieee80211_local *local = sdata->local;
struct sta_info *sta;
int i;
- DECLARE_MAC_BUF(mbuf);
- sta = kzalloc(sizeof(*sta), gfp);
+ sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp);
if (!sta)
return NULL;
- memcpy(sta->addr, addr, ETH_ALEN);
+ spin_lock_init(&sta->lock);
+ spin_lock_init(&sta->flaglock);
+
+ memcpy(sta->sta.addr, addr, ETH_ALEN);
sta->local = local;
sta->sdata = sdata;
sta->rate_ctrl = rate_control_get(local->rate_ctrl);
sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
- gfp);
+ &sta->sta, gfp);
if (!sta->rate_ctrl_priv) {
rate_control_put(sta->rate_ctrl);
kfree(sta);
return NULL;
}
- spin_lock_init(&sta->ampdu_mlme.ampdu_rx);
- spin_lock_init(&sta->ampdu_mlme.ampdu_tx);
for (i = 0; i < STA_TID_NUM; i++) {
/* timer_to_tid must be initialized with identity mapping to
* enable session_timer's data differentiation. refer to
* sta_rx_agg_session_timer_expired for useage */
sta->timer_to_tid[i] = i;
/* tid to tx queue: initialize according to HW (0 is valid) */
- sta->tid_to_tx_q[i] = local->hw.queues;
+ sta->tid_to_tx_q[i] = ieee80211_num_queues(&local->hw);
/* rx */
sta->ampdu_mlme.tid_state_rx[i] = HT_AGG_STATE_IDLE;
sta->ampdu_mlme.tid_rx[i] = NULL;
skb_queue_head_init(&sta->tx_filtered);
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- printk(KERN_DEBUG "%s: Allocated STA %s\n",
- wiphy_name(local->hw.wiphy), print_mac(mbuf, sta->addr));
+ printk(KERN_DEBUG "%s: Allocated STA %pM\n",
+ wiphy_name(local->hw.wiphy), sta->sta.addr);
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
#ifdef CONFIG_MAC80211_MESH
sta->plink_state = PLINK_LISTEN;
- spin_lock_init(&sta->plink_lock);
init_timer(&sta->plink_timer);
#endif
struct ieee80211_sub_if_data *sdata = sta->sdata;
unsigned long flags;
int err = 0;
- DECLARE_MAC_BUF(mac);
/*
* Can't be a WARN_ON because it can be triggered through a race:
goto out_free;
}
- if (WARN_ON(compare_ether_addr(sta->addr, sdata->dev->dev_addr) == 0 ||
- is_multicast_ether_addr(sta->addr))) {
+ if (WARN_ON(compare_ether_addr(sta->sta.addr, sdata->dev->dev_addr) == 0 ||
+ is_multicast_ether_addr(sta->sta.addr))) {
err = -EINVAL;
goto out_free;
}
spin_lock_irqsave(&local->sta_lock, flags);
/* check if STA exists already */
- if (__sta_info_find(local, sta->addr)) {
+ if (sta_info_get(local, sta->sta.addr)) {
spin_unlock_irqrestore(&local->sta_lock, flags);
err = -EEXIST;
goto out_free;
/* notify driver */
if (local->ops->sta_notify) {
- if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
- sdata = sdata->u.vlan.ap;
+ if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+ sdata = container_of(sdata->bss,
+ struct ieee80211_sub_if_data,
+ u.ap);
local->ops->sta_notify(local_to_hw(local), &sdata->vif,
- STA_NOTIFY_ADD, sta->addr);
+ STA_NOTIFY_ADD, &sta->sta);
}
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- printk(KERN_DEBUG "%s: Inserted STA %s\n",
- wiphy_name(local->hw.wiphy), print_mac(mac, sta->addr));
+ printk(KERN_DEBUG "%s: Inserted STA %pM\n",
+ wiphy_name(local->hw.wiphy), sta->sta.addr);
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
spin_unlock_irqrestore(&local->sta_lock, flags);
* NOTE: due to auto-freeing semantics this may only be done
* if the insertion is successful!
*/
- queue_work(local->hw.workqueue, &local->sta_debugfs_add);
+ schedule_work(&local->sta_debugfs_add);
#endif
if (ieee80211_vif_is_mesh(&sdata->vif))
static void __sta_info_set_tim_bit(struct ieee80211_if_ap *bss,
struct sta_info *sta)
{
- if (bss)
- __bss_tim_set(bss, sta->aid);
+ BUG_ON(!bss);
+
+ __bss_tim_set(bss, sta->sta.aid);
+
if (sta->local->ops->set_tim) {
sta->local->tim_in_locked_section = true;
- sta->local->ops->set_tim(local_to_hw(sta->local), sta->aid, 1);
+ sta->local->ops->set_tim(local_to_hw(sta->local),
+ &sta->sta, true);
sta->local->tim_in_locked_section = false;
}
}
{
unsigned long flags;
+ BUG_ON(!sta->sdata->bss);
+
spin_lock_irqsave(&sta->local->sta_lock, flags);
__sta_info_set_tim_bit(sta->sdata->bss, sta);
spin_unlock_irqrestore(&sta->local->sta_lock, flags);
static void __sta_info_clear_tim_bit(struct ieee80211_if_ap *bss,
struct sta_info *sta)
{
- if (bss)
- __bss_tim_clear(bss, sta->aid);
+ BUG_ON(!bss);
+
+ __bss_tim_clear(bss, sta->sta.aid);
+
if (sta->local->ops->set_tim) {
sta->local->tim_in_locked_section = true;
- sta->local->ops->set_tim(local_to_hw(sta->local), sta->aid, 0);
+ sta->local->ops->set_tim(local_to_hw(sta->local),
+ &sta->sta, false);
sta->local->tim_in_locked_section = false;
}
}
{
unsigned long flags;
- spin_lock_irqsave(&sta->local->sta_lock, flags);
- __sta_info_clear_tim_bit(sta->sdata->bss, sta);
- spin_unlock_irqrestore(&sta->local->sta_lock, flags);
-}
-
-/*
- * See comment in __sta_info_unlink,
- * caller must hold local->sta_lock.
- */
-static void __sta_info_pin(struct sta_info *sta)
-{
- WARN_ON(sta->pin_status != STA_INFO_PIN_STAT_NORMAL);
- sta->pin_status = STA_INFO_PIN_STAT_PINNED;
-}
-
-/*
- * See comment in __sta_info_unlink, returns sta if it
- * needs to be destroyed.
- */
-static struct sta_info *__sta_info_unpin(struct sta_info *sta)
-{
- struct sta_info *ret = NULL;
- unsigned long flags;
+ BUG_ON(!sta->sdata->bss);
spin_lock_irqsave(&sta->local->sta_lock, flags);
- WARN_ON(sta->pin_status != STA_INFO_PIN_STAT_DESTROY &&
- sta->pin_status != STA_INFO_PIN_STAT_PINNED);
- if (sta->pin_status == STA_INFO_PIN_STAT_DESTROY)
- ret = sta;
- sta->pin_status = STA_INFO_PIN_STAT_NORMAL;
+ __sta_info_clear_tim_bit(sta->sdata->bss, sta);
spin_unlock_irqrestore(&sta->local->sta_lock, flags);
-
- return ret;
}
static void __sta_info_unlink(struct sta_info **sta)
{
struct ieee80211_local *local = (*sta)->local;
struct ieee80211_sub_if_data *sdata = (*sta)->sdata;
-#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- DECLARE_MAC_BUF(mbuf);
-#endif
/*
* pull caller's reference if we're already gone.
*/
return;
}
- /*
- * Also pull caller's reference if the STA is pinned by the
- * task that is adding the debugfs entries. In that case, we
- * leave the STA "to be freed".
- *
- * The rules are not trivial, but not too complex either:
- * (1) pin_status is only modified under the sta_lock
- * (2) sta_info_debugfs_add_work() will set the status
- * to PINNED when it found an item that needs a new
- * debugfs directory created. In that case, that item
- * must not be freed although all *RCU* users are done
- * with it. Hence, we tell the caller of _unlink()
- * that the item is already gone (as can happen when
- * two tasks try to unlink/destroy at the same time)
- * (3) We set the pin_status to DESTROY here when we
- * find such an item.
- * (4) sta_info_debugfs_add_work() will reset the pin_status
- * from PINNED to NORMAL when it is done with the item,
- * but will check for DESTROY before resetting it in
- * which case it will free the item.
- */
- if ((*sta)->pin_status == STA_INFO_PIN_STAT_PINNED) {
- (*sta)->pin_status = STA_INFO_PIN_STAT_DESTROY;
- *sta = NULL;
- return;
+ if ((*sta)->key) {
+ ieee80211_key_free((*sta)->key);
+ WARN_ON((*sta)->key);
}
list_del(&(*sta)->list);
- if ((*sta)->flags & WLAN_STA_PS) {
- (*sta)->flags &= ~WLAN_STA_PS;
- if (sdata->bss)
- atomic_dec(&sdata->bss->num_sta_ps);
+ if (test_and_clear_sta_flags(*sta, WLAN_STA_PS)) {
+ BUG_ON(!sdata->bss);
+
+ atomic_dec(&sdata->bss->num_sta_ps);
__sta_info_clear_tim_bit(sdata->bss, *sta);
}
local->num_sta--;
if (local->ops->sta_notify) {
- if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
- sdata = sdata->u.vlan.ap;
+ if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+ sdata = container_of(sdata->bss,
+ struct ieee80211_sub_if_data,
+ u.ap);
local->ops->sta_notify(local_to_hw(local), &sdata->vif,
- STA_NOTIFY_REMOVE, (*sta)->addr);
+ STA_NOTIFY_REMOVE, &(*sta)->sta);
}
if (ieee80211_vif_is_mesh(&sdata->vif)) {
}
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- printk(KERN_DEBUG "%s: Removed STA %s\n",
- wiphy_name(local->hw.wiphy), print_mac(mbuf, (*sta)->addr));
+ printk(KERN_DEBUG "%s: Removed STA %pM\n",
+ wiphy_name(local->hw.wiphy), (*sta)->sta.addr);
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
+
+ /*
+ * Finally, pull caller's reference if the STA is pinned by the
+ * task that is adding the debugfs entries. In that case, we
+ * leave the STA "to be freed".
+ *
+ * The rules are not trivial, but not too complex either:
+ * (1) pin_status is only modified under the sta_lock
+ * (2) STAs may only be pinned under the RTNL so that
+ * sta_info_flush() is guaranteed to actually destroy
+ * all STAs that are active for a given interface, this
+ * is required for correctness because otherwise we
+ * could notify a driver that an interface is going
+ * away and only after that (!) notify it about a STA
+ * on that interface going away.
+ * (3) sta_info_debugfs_add_work() will set the status
+ * to PINNED when it found an item that needs a new
+ * debugfs directory created. In that case, that item
+ * must not be freed although all *RCU* users are done
+ * with it. Hence, we tell the caller of _unlink()
+ * that the item is already gone (as can happen when
+ * two tasks try to unlink/destroy at the same time)
+ * (4) We set the pin_status to DESTROY here when we
+ * find such an item.
+ * (5) sta_info_debugfs_add_work() will reset the pin_status
+ * from PINNED to NORMAL when it is done with the item,
+ * but will check for DESTROY before resetting it in
+ * which case it will free the item.
+ */
+ if ((*sta)->pin_status == STA_INFO_PIN_STAT_PINNED) {
+ (*sta)->pin_status = STA_INFO_PIN_STAT_DESTROY;
+ *sta = NULL;
+ return;
+ }
}
void sta_info_unlink(struct sta_info **sta)
struct sta_info *sta,
struct sk_buff *skb)
{
- struct ieee80211_tx_packet_data *pkt_data;
+ struct ieee80211_tx_info *info;
int timeout;
if (!skb)
return 0;
- pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
+ info = IEEE80211_SKB_CB(skb);
/* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
timeout = (sta->listen_interval * local->hw.conf.beacon_int * 32 /
15625) * HZ;
if (timeout < STA_TX_BUFFER_EXPIRE)
timeout = STA_TX_BUFFER_EXPIRE;
- return time_after(jiffies, pkt_data->jiffies + timeout);
+ return time_after(jiffies, info->control.jiffies + timeout);
}
unsigned long flags;
struct sk_buff *skb;
struct ieee80211_sub_if_data *sdata;
- DECLARE_MAC_BUF(mac);
if (skb_queue_empty(&sta->ps_tx_buf))
return;
sdata = sta->sdata;
local->total_ps_buffered--;
- printk(KERN_DEBUG "Buffered frame expired (STA "
- "%s)\n", print_mac(mac, sta->addr));
+#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
+ printk(KERN_DEBUG "Buffered frame expired (STA %pM)\n",
+ sta->sta.addr);
+#endif
dev_kfree_skb(skb);
if (skb_queue_empty(&sta->ps_tx_buf))
}
#ifdef CONFIG_MAC80211_DEBUGFS
+/*
+ * See comment in __sta_info_unlink,
+ * caller must hold local->sta_lock.
+ */
+static void __sta_info_pin(struct sta_info *sta)
+{
+ WARN_ON(sta->pin_status != STA_INFO_PIN_STAT_NORMAL);
+ sta->pin_status = STA_INFO_PIN_STAT_PINNED;
+}
+
+/*
+ * See comment in __sta_info_unlink, returns sta if it
+ * needs to be destroyed.
+ */
+static struct sta_info *__sta_info_unpin(struct sta_info *sta)
+{
+ struct sta_info *ret = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&sta->local->sta_lock, flags);
+ WARN_ON(sta->pin_status != STA_INFO_PIN_STAT_DESTROY &&
+ sta->pin_status != STA_INFO_PIN_STAT_PINNED);
+ if (sta->pin_status == STA_INFO_PIN_STAT_DESTROY)
+ ret = sta;
+ sta->pin_status = STA_INFO_PIN_STAT_NORMAL;
+ spin_unlock_irqrestore(&sta->local->sta_lock, flags);
+
+ return ret;
+}
+
static void sta_info_debugfs_add_work(struct work_struct *work)
{
struct ieee80211_local *local =
struct sta_info *sta, *tmp;
unsigned long flags;
+ /* We need to keep the RTNL across the whole pinned status. */
+ rtnl_lock();
while (1) {
sta = NULL;
spin_lock_irqsave(&local->sta_lock, flags);
list_for_each_entry(tmp, &local->sta_list, list) {
- if (!tmp->debugfs.dir) {
+ /*
+ * debugfs.add_has_run will be set by
+ * ieee80211_sta_debugfs_add regardless
+ * of what else it does.
+ */
+ if (!tmp->debugfs.add_has_run) {
sta = tmp;
__sta_info_pin(sta);
break;
rate_control_add_sta_debugfs(sta);
sta = __sta_info_unpin(sta);
- rtnl_lock();
sta_info_destroy(sta);
- rtnl_unlock();
}
+ rtnl_unlock();
}
#endif
+static void __ieee80211_run_pending_flush(struct ieee80211_local *local)
+{
+ struct sta_info *sta;
+ unsigned long flags;
+
+ ASSERT_RTNL();
+
+ spin_lock_irqsave(&local->sta_lock, flags);
+ while (!list_empty(&local->sta_flush_list)) {
+ sta = list_first_entry(&local->sta_flush_list,
+ struct sta_info, list);
+ list_del(&sta->list);
+ spin_unlock_irqrestore(&local->sta_lock, flags);
+ sta_info_destroy(sta);
+ spin_lock_irqsave(&local->sta_lock, flags);
+ }
+ spin_unlock_irqrestore(&local->sta_lock, flags);
+}
+
+static void ieee80211_sta_flush_work(struct work_struct *work)
+{
+ struct ieee80211_local *local =
+ container_of(work, struct ieee80211_local, sta_flush_work);
+
+ rtnl_lock();
+ __ieee80211_run_pending_flush(local);
+ rtnl_unlock();
+}
+
void sta_info_init(struct ieee80211_local *local)
{
spin_lock_init(&local->sta_lock);
INIT_LIST_HEAD(&local->sta_list);
+ INIT_LIST_HEAD(&local->sta_flush_list);
+ INIT_WORK(&local->sta_flush_work, ieee80211_sta_flush_work);
setup_timer(&local->sta_cleanup, sta_info_cleanup,
(unsigned long)local);
void sta_info_stop(struct ieee80211_local *local)
{
del_timer(&local->sta_cleanup);
+ cancel_work_sync(&local->sta_flush_work);
+#ifdef CONFIG_MAC80211_DEBUGFS
+ /*
+ * Make sure the debugfs adding work isn't pending after this
+ * because we're about to be destroyed. It doesn't matter
+ * whether it ran or not since we're going to flush all STAs
+ * anyway.
+ */
+ cancel_work_sync(&local->sta_debugfs_add);
+#endif
+
+ rtnl_lock();
sta_info_flush(local, NULL);
+ __ieee80211_run_pending_flush(local);
+ rtnl_unlock();
}
/**
unsigned long flags;
might_sleep();
+ ASSERT_RTNL();
spin_lock_irqsave(&local->sta_lock, flags);
list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
return ret;
}
+
+/**
+ * sta_info_flush_delayed - flush matching STA entries from the STA table
+ *
+ * This function unlinks all stations for a given interface and queues
+ * them for freeing. Note that the workqueue function scheduled here has
+ * to run before any new keys can be added to the system to avoid set_key()
+ * callback ordering issues.
+ *
+ * @sdata: the interface
+ */
+void sta_info_flush_delayed(struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct sta_info *sta, *tmp;
+ unsigned long flags;
+ bool work = false;
+
+ spin_lock_irqsave(&local->sta_lock, flags);
+ list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
+ if (sdata == sta->sdata) {
+ __sta_info_unlink(&sta);
+ if (sta) {
+ list_add_tail(&sta->list,
+ &local->sta_flush_list);
+ work = true;
+ }
+ }
+ }
+ if (work)
+ schedule_work(&local->sta_flush_work);
+ spin_unlock_irqrestore(&local->sta_lock, flags);
+}
+
+void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
+ unsigned long exp_time)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct sta_info *sta, *tmp;
+ LIST_HEAD(tmp_list);
+ unsigned long flags;
+
+ spin_lock_irqsave(&local->sta_lock, flags);
+ list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
+ if (time_after(jiffies, sta->last_rx + exp_time)) {
+#ifdef CONFIG_MAC80211_IBSS_DEBUG
+ printk(KERN_DEBUG "%s: expiring inactive STA %pM\n",
+ sdata->dev->name, sta->sta.addr);
+#endif
+ __sta_info_unlink(&sta);
+ if (sta)
+ list_add(&sta->list, &tmp_list);
+ }
+ spin_unlock_irqrestore(&local->sta_lock, flags);
+
+ list_for_each_entry_safe(sta, tmp, &tmp_list, list)
+ sta_info_destroy(sta);
+}
+
+struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_hw *hw,
+ const u8 *addr)
+{
+ struct sta_info *sta = sta_info_get(hw_to_local(hw), addr);
+
+ if (!sta)
+ return NULL;
+ return &sta->sta;
+}
+EXPORT_SYMBOL(ieee80211_find_sta);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff