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cfg80211: export interface stopping function

Browse source 
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
Show stats Download patch file Download diff file Expand all files Collapse all files

15
include/net/cfg80211.h
View file

@ -4756,6 +4756,21 @@ int cfg80211_iter_combinations(struct wiphy *wiphy,
void *data),
void *data);
/*
* cfg80211_stop_iface - trigger interface disconnection
*
* @wiphy: the wiphy
* @wdev: wireless device
* @gfp: context flags
*
* Trigger interface to be stopped as if AP was stopped, IBSS/mesh left, STA
* disconnected.
*
* Note: This doesn't need any locks and is asynchronous.
*/
void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
gfp_t gfp);
/* Logging, debugging and troubleshooting/diagnostic helpers. */
/* wiphy_printk helpers, similar to dev_printk */

4
net/wireless/ap.c
View file

@ -6,8 +6,8 @@
#include "rdev-ops.h"
static int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
struct net_device *dev, bool notify)
int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
struct net_device *dev, bool notify)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
int err;

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)
{

7
net/wireless/core.h
View file

@ -185,6 +185,7 @@ enum cfg80211_event_type {
EVENT_ROAMED,
EVENT_DISCONNECTED,
EVENT_IBSS_JOINED,
EVENT_STOPPED,
};
struct cfg80211_event {
@ -281,6 +282,8 @@ int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
struct net_device *dev,
struct mesh_setup *setup,
const struct mesh_config *conf);
int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
struct net_device *dev);
int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
struct net_device *dev);
int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
@ -288,6 +291,8 @@ int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
struct cfg80211_chan_def *chandef);
/* AP */
int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
struct net_device *dev, bool notify);
int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
struct net_device *dev, bool notify);
@ -441,6 +446,8 @@ int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
enum nl80211_iftype iftype, int 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);

4
net/wireless/mesh.c
View file

@ -238,8 +238,8 @@ int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
return 0;
}
static int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
struct net_device *dev)
int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
struct net_device *dev)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
int err;

15
net/wireless/trace.h
View file

@ -2636,6 +2636,21 @@ TRACE_EVENT(cfg80211_ft_event,
WIPHY_PR_ARG, NETDEV_PR_ARG, MAC_PR_ARG(target_ap))
);
TRACE_EVENT(cfg80211_stop_iface,
TP_PROTO(struct wiphy *wiphy, struct wireless_dev *wdev),
TP_ARGS(wiphy, wdev),
TP_STRUCT__entry(
WIPHY_ENTRY
WDEV_ENTRY
),
TP_fast_assign(
WIPHY_ASSIGN;
WDEV_ASSIGN;
),
TP_printk(WIPHY_PR_FMT ", " WDEV_PR_FMT,
WIPHY_PR_ARG, WDEV_PR_ARG)
);
#endif /* !__RDEV_OPS_TRACE || TRACE_HEADER_MULTI_READ */
#undef TRACE_INCLUDE_PATH

3
net/wireless/util.c
View file

@ -839,6 +839,9 @@ void cfg80211_process_wdev_events(struct wireless_dev *wdev)
__cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid,
ev->ij.channel);
break;
case EVENT_STOPPED:
__cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev);
break;
}
wdev_unlock(wdev);