cfg80211: send events when devices are added/removed
[cascardo/linux.git] / net / wireless / core.c
index a3bf18d..a1c4065 100644 (file)
@@ -69,7 +69,7 @@ struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
 
 int get_wiphy_idx(struct wiphy *wiphy)
 {
-       struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+       struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 
        return rdev->wiphy_idx;
 }
@@ -130,7 +130,7 @@ int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
                            newname))
                pr_err("failed to rename debugfs dir to %s!\n", newname);
 
-       nl80211_notify_dev_rename(rdev);
+       nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
 
        return 0;
 }
@@ -210,15 +210,12 @@ void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
        }
 }
 
-static int cfg80211_rfkill_set_block(void *data, bool blocked)
+void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
 {
-       struct cfg80211_registered_device *rdev = data;
+       struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        struct wireless_dev *wdev;
 
-       if (!blocked)
-               return 0;
-
-       rtnl_lock();
+       ASSERT_RTNL();
 
        list_for_each_entry(wdev, &rdev->wdev_list, list) {
                if (wdev->netdev) {
@@ -234,7 +231,18 @@ static int cfg80211_rfkill_set_block(void *data, bool blocked)
                        break;
                }
        }
+}
+EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
+
+static int cfg80211_rfkill_set_block(void *data, bool blocked)
+{
+       struct cfg80211_registered_device *rdev = data;
+
+       if (!blocked)
+               return 0;
 
+       rtnl_lock();
+       cfg80211_shutdown_all_interfaces(&rdev->wiphy);
        rtnl_unlock();
 
        return 0;
@@ -260,6 +268,45 @@ static void cfg80211_event_work(struct work_struct *work)
        rtnl_unlock();
 }
 
+void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
+{
+       struct cfg80211_iface_destroy *item;
+
+       ASSERT_RTNL();
+
+       spin_lock_irq(&rdev->destroy_list_lock);
+       while ((item = list_first_entry_or_null(&rdev->destroy_list,
+                                               struct cfg80211_iface_destroy,
+                                               list))) {
+               struct wireless_dev *wdev, *tmp;
+               u32 nlportid = item->nlportid;
+
+               list_del(&item->list);
+               kfree(item);
+               spin_unlock_irq(&rdev->destroy_list_lock);
+
+               list_for_each_entry_safe(wdev, tmp, &rdev->wdev_list, list) {
+                       if (nlportid == wdev->owner_nlportid)
+                               rdev_del_virtual_intf(rdev, wdev);
+               }
+
+               spin_lock_irq(&rdev->destroy_list_lock);
+       }
+       spin_unlock_irq(&rdev->destroy_list_lock);
+}
+
+static void cfg80211_destroy_iface_wk(struct work_struct *work)
+{
+       struct cfg80211_registered_device *rdev;
+
+       rdev = container_of(work, struct cfg80211_registered_device,
+                           destroy_work);
+
+       rtnl_lock();
+       cfg80211_destroy_ifaces(rdev);
+       rtnl_unlock();
+}
+
 /* exported functions */
 
 struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
@@ -318,6 +365,10 @@ struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
        rdev->wiphy.dev.class = &ieee80211_class;
        rdev->wiphy.dev.platform_data = rdev;
 
+       INIT_LIST_HEAD(&rdev->destroy_list);
+       spin_lock_init(&rdev->destroy_list_lock);
+       INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
+
 #ifdef CONFIG_CFG80211_DEFAULT_PS
        rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 #endif
@@ -351,6 +402,8 @@ struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
        rdev->wiphy.rts_threshold = (u32) -1;
        rdev->wiphy.coverage_class = 0;
 
+       rdev->wiphy.max_num_csa_counters = 1;
+
        return &rdev->wiphy;
 }
 EXPORT_SYMBOL(wiphy_new);
@@ -396,10 +449,7 @@ static int wiphy_verify_combinations(struct wiphy *wiphy)
                for (j = 0; j < c->n_limits; j++) {
                        u16 types = c->limits[j].types;
 
-                       /*
-                        * interface types shouldn't overlap, this is
-                        * used in cfg80211_can_change_interface()
-                        */
+                       /* interface types shouldn't overlap */
                        if (WARN_ON(types & all_iftypes))
                                return -EINVAL;
                        all_iftypes |= types;
@@ -435,7 +485,7 @@ static int wiphy_verify_combinations(struct wiphy *wiphy)
 
 int wiphy_register(struct wiphy *wiphy)
 {
-       struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+       struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        int res;
        enum ieee80211_band band;
        struct ieee80211_supported_band *sband;
@@ -610,13 +660,15 @@ int wiphy_register(struct wiphy *wiphy)
                return res;
        }
 
+       nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
+
        return 0;
 }
 EXPORT_SYMBOL(wiphy_register);
 
 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
 {
-       struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+       struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 
        if (!rdev->ops->rfkill_poll)
                return;
@@ -627,7 +679,7 @@ EXPORT_SYMBOL(wiphy_rfkill_start_polling);
 
 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
 {
-       struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+       struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 
        rfkill_pause_polling(rdev->rfkill);
 }
@@ -635,7 +687,7 @@ EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
 
 void wiphy_unregister(struct wiphy *wiphy)
 {
-       struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+       struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 
        wait_event(rdev->dev_wait, ({
                int __count;
@@ -648,9 +700,10 @@ void wiphy_unregister(struct wiphy *wiphy)
                rfkill_unregister(rdev->rfkill);
 
        rtnl_lock();
+       nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
        rdev->wiphy.registered = false;
 
-       BUG_ON(!list_empty(&rdev->wdev_list));
+       WARN_ON(!list_empty(&rdev->wdev_list));
 
        /*
         * First remove the hardware from everywhere, this makes
@@ -675,6 +728,7 @@ void wiphy_unregister(struct wiphy *wiphy)
        cancel_work_sync(&rdev->conn_work);
        flush_work(&rdev->event_work);
        cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
+       flush_work(&rdev->destroy_work);
 
 #ifdef CONFIG_PM
        if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
@@ -707,7 +761,7 @@ EXPORT_SYMBOL(wiphy_free);
 
 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
 {
-       struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+       struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 
        if (rfkill_set_hw_state(rdev->rfkill, blocked))
                schedule_work(&rdev->rfkill_sync);
@@ -716,7 +770,7 @@ EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
 
 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
 {
-       struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
+       struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 
        ASSERT_RTNL();
 
@@ -737,7 +791,7 @@ void cfg80211_unregister_wdev(struct wireless_dev *wdev)
 }
 EXPORT_SYMBOL(cfg80211_unregister_wdev);
 
-static struct device_type wiphy_type = {
+static const struct device_type wiphy_type = {
        .name   = "wlan",
 };
 
@@ -751,23 +805,23 @@ 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;
@@ -776,32 +830,60 @@ 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);
+               __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)
 {
        struct net_device *dev = netdev_notifier_info_to_dev(ptr);
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_registered_device *rdev;
-       int ret;
 
        if (!wdev)
                return NOTIFY_DONE;
 
-       rdev = wiphy_to_dev(wdev->wiphy);
+       rdev = wiphy_to_rdev(wdev->wiphy);
 
        WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
 
@@ -959,13 +1041,14 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
        case NETDEV_PRE_UP:
                if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
                        return notifier_from_errno(-EOPNOTSUPP);
-               ret = cfg80211_can_add_interface(rdev, wdev->iftype);
-               if (ret)
-                       return notifier_from_errno(ret);
+               if (rfkill_blocked(rdev->rfkill))
+                       return notifier_from_errno(-ERFKILL);
                break;
+       default:
+               return NOTIFY_DONE;
        }
 
-       return NOTIFY_DONE;
+       return NOTIFY_OK;
 }
 
 static struct notifier_block cfg80211_netdev_notifier = {