cfg80211: add P2P Device abstraction
In order to support using a different MAC address
for the P2P Device address we must first have a
P2P Device abstraction that can be assigned a MAC
address.
This abstraction will also be useful to support
offloading P2P operations to the device, e.g.
periodic listen for discoverability.
Currently, the driver is responsible for assigning
a MAC address to the P2P Device, but this could be
changed by allowing a MAC address to be given to
the NEW_INTERFACE command.
As it has no associated netdev, a P2P Device can
only be identified by its wdev identifier but the
previous patches allowed using the wdev identifier
in various APIs, e.g. remain-on-channel.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/wireless/core.c b/net/wireless/core.c
index 31b40cc..91b3004 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -230,9 +230,24 @@
rtnl_lock();
mutex_lock(&rdev->devlist_mtx);
- list_for_each_entry(wdev, &rdev->wdev_list, list)
- if (wdev->netdev)
+ list_for_each_entry(wdev, &rdev->wdev_list, list) {
+ if (wdev->netdev) {
dev_close(wdev->netdev);
+ continue;
+ }
+ /* otherwise, check iftype */
+ switch (wdev->iftype) {
+ case NL80211_IFTYPE_P2P_DEVICE:
+ if (!wdev->p2p_started)
+ break;
+ rdev->ops->stop_p2p_device(&rdev->wiphy, wdev);
+ wdev->p2p_started = false;
+ rdev->opencount--;
+ break;
+ default:
+ break;
+ }
+ }
mutex_unlock(&rdev->devlist_mtx);
rtnl_unlock();
@@ -407,6 +422,11 @@
if (WARN_ON(wiphy->software_iftypes & types))
return -EINVAL;
+ /* Only a single P2P_DEVICE can be allowed */
+ if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
+ c->limits[j].max > 1))
+ return -EINVAL;
+
cnt += c->limits[j].max;
/*
* Don't advertise an unsupported type
@@ -734,6 +754,35 @@
dev_put(wdev->netdev);
}
+void cfg80211_unregister_wdev(struct wireless_dev *wdev)
+{
+ struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
+
+ ASSERT_RTNL();
+
+ if (WARN_ON(wdev->netdev))
+ return;
+
+ mutex_lock(&rdev->devlist_mtx);
+ list_del_rcu(&wdev->list);
+ rdev->devlist_generation++;
+
+ switch (wdev->iftype) {
+ case NL80211_IFTYPE_P2P_DEVICE:
+ if (!wdev->p2p_started)
+ break;
+ rdev->ops->stop_p2p_device(&rdev->wiphy, wdev);
+ wdev->p2p_started = false;
+ rdev->opencount--;
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ break;
+ }
+ mutex_unlock(&rdev->devlist_mtx);
+}
+EXPORT_SYMBOL(cfg80211_unregister_wdev);
+
static struct device_type wiphy_type = {
.name = "wlan",
};