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-rw-r--r--include/net/cfg80211.h4
-rw-r--r--net/wireless/core.c24
-rw-r--r--net/wireless/core.h14
-rw-r--r--net/wireless/util.c5
4 files changed, 47 insertions, 0 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index e030c6a..f0d213d 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1499,6 +1499,8 @@ struct cfg80211_gtk_rekey_data {
* interfaces are active this callback should reject the configuration.
* If no interfaces are active or the device is down, the channel should
* be stored for when a monitor interface becomes active.
+ * @set_monitor_enabled: Notify driver that there are only monitor
+ * interfaces running.
* @get_channel: Get the current operating channel, should return %NULL if
* there's no single defined operating channel if for example the
* device implements channel hopping for multi-channel virtual interfaces.
@@ -1817,6 +1819,8 @@ struct cfg80211_ops {
struct ethtool_stats *stats, u64 *data);
void (*get_et_strings)(struct wiphy *wiphy, struct net_device *dev,
u32 sset, u8 *data);
+
+ void (*set_monitor_enabled)(struct wiphy *wiphy, bool enabled);
};
/*
diff --git a/net/wireless/core.c b/net/wireless/core.c
index c65f59c..8412da7d 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -717,6 +717,24 @@ static struct device_type wiphy_type = {
.name = "wlan",
};
+void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
+ enum nl80211_iftype iftype, int num)
+{
+ bool has_monitors_only_old = cfg80211_has_monitors_only(rdev);
+ bool has_monitors_only_new;
+
+ ASSERT_RDEV_LOCK(rdev);
+
+ rdev->num_running_ifaces += num;
+ if (iftype == NL80211_IFTYPE_MONITOR)
+ rdev->num_running_monitor_ifaces += num;
+
+ has_monitors_only_new = cfg80211_has_monitors_only(rdev);
+ if (has_monitors_only_new != has_monitors_only_old)
+ rdev->ops->set_monitor_enabled(&rdev->wiphy,
+ has_monitors_only_new);
+}
+
static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
unsigned long state,
void *ndev)
@@ -820,6 +838,9 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
break;
case NETDEV_DOWN:
dev_hold(dev);
+ cfg80211_lock_rdev(rdev);
+ cfg80211_update_iface_num(rdev, wdev->iftype, -1);
+ cfg80211_unlock_rdev(rdev);
queue_work(cfg80211_wq, &wdev->cleanup_work);
break;
case NETDEV_UP:
@@ -927,6 +948,9 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
ret = cfg80211_can_add_interface(rdev, wdev->iftype);
if (ret)
return notifier_from_errno(ret);
+ cfg80211_lock_rdev(rdev);
+ cfg80211_update_iface_num(rdev, wdev->iftype, 1);
+ cfg80211_unlock_rdev(rdev);
break;
}
diff --git a/net/wireless/core.h b/net/wireless/core.h
index 56f18c2..99acd51 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -56,6 +56,9 @@ struct cfg80211_registered_device {
u32 ap_beacons_nlpid;
+ int num_running_ifaces;
+ int num_running_monitor_ifaces;
+
/* BSSes/scanning */
spinlock_t bss_lock;
struct list_head bss_list;
@@ -197,6 +200,14 @@ static inline void wdev_unlock(struct wireless_dev *wdev)
#define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx)
#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
+static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
+{
+ ASSERT_RDEV_LOCK(rdev);
+
+ return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
+ rdev->num_running_ifaces > 0;
+}
+
enum cfg80211_event_type {
EVENT_CONNECT_RESULT,
EVENT_ROAMED,
@@ -444,6 +455,9 @@ int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
u32 beacon_int);
+void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
+ enum nl80211_iftype iftype, int num);
+
#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
#else
diff --git a/net/wireless/util.c b/net/wireless/util.c
index fc948d0..9b92ec5 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -871,6 +871,11 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
}
}
+ if (!err && ntype != otype && netif_running(dev)) {
+ cfg80211_update_iface_num(rdev, ntype, 1);
+ cfg80211_update_iface_num(rdev, otype, -1);
+ }
+
return err;
}