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cfg80211: add P2P Device abstraction

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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>
This commit is contained in:
Johannes Berg
2012-06-16 00:19:54 +02:00
parent cc74c0c7d6
commit 98104fdeda
9 changed files with 265 additions and 20 deletions
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53
net/wireless/core.c
View File

@@ -230,9 +230,24 @@ static int cfg80211_rfkill_set_block(void *data, bool blocked)
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 @@ static int wiphy_verify_combinations(struct wiphy *wiphy)
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 @@ static void wdev_cleanup_work(struct work_struct *work)
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",
};