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cfg80211: export interface stopping function

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This exports a new cfg80211_stop_iface() function.

This is intended for driver internal interface
combination management and channel switching.

Due to locking issues (it re-enters driver) the
call is asynchronous and uses cfg80211 event
list/worker.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Michal Kazior
2014-04-09 15:11:01 +02:00
committed by Johannes Berg
parent 66199506fb
commit f04c22033c
7 changed files with 80 additions and 11 deletions
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43
net/wireless/core.c
View File

@@ -792,23 +792,23 @@ void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
rdev->num_running_monitor_ifaces += num;
}
void cfg80211_leave(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev)
void __cfg80211_leave(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev)
{
struct net_device *dev = wdev->netdev;
ASSERT_RTNL();
ASSERT_WDEV_LOCK(wdev);
switch (wdev->iftype) {
case NL80211_IFTYPE_ADHOC:
cfg80211_leave_ibss(rdev, dev, true);
__cfg80211_leave_ibss(rdev, dev, true);
break;
case NL80211_IFTYPE_P2P_CLIENT:
case NL80211_IFTYPE_STATION:
if (rdev->sched_scan_req && dev == rdev->sched_scan_req->dev)
__cfg80211_stop_sched_scan(rdev, false);
wdev_lock(wdev);
#ifdef CONFIG_CFG80211_WEXT
kfree(wdev->wext.ie);
wdev->wext.ie = NULL;
@@ -817,20 +817,49 @@ void cfg80211_leave(struct cfg80211_registered_device *rdev,
#endif
cfg80211_disconnect(rdev, dev,
WLAN_REASON_DEAUTH_LEAVING, true);
wdev_unlock(wdev);
break;
case NL80211_IFTYPE_MESH_POINT:
cfg80211_leave_mesh(rdev, dev);
__cfg80211_leave_mesh(rdev, dev);
break;
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_P2P_GO:
cfg80211_stop_ap(rdev, dev, true);
__cfg80211_stop_ap(rdev, dev, true);
break;
default:
break;
}
}
void cfg80211_leave(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev)
{
wdev_lock(wdev);
__cfg80211_leave(rdev, wdev);
wdev_unlock(wdev);
}
void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
gfp_t gfp)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
struct cfg80211_event *ev;
unsigned long flags;
trace_cfg80211_stop_iface(wiphy, wdev);
ev = kzalloc(sizeof(*ev), gfp);
if (!ev)
return;
ev->type = EVENT_STOPPED;
spin_lock_irqsave(&wdev->event_lock, flags);
list_add_tail(&ev->list, &wdev->event_list);
spin_unlock_irqrestore(&wdev->event_lock, flags);
queue_work(cfg80211_wq, &rdev->event_work);
}
EXPORT_SYMBOL(cfg80211_stop_iface);
static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
unsigned long state, void *ptr)
{