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cfg80211: combine duplicate wdev init code

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There's a bit of duplicated code to initialize a wdev, pull it out
into a separate function to call from both places.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2018-09-13 14:12:03 +02:00
parent a5ae326418
commit e4d4216e91
3 changed files with 27 additions and 26 deletions
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40
net/wireless/core.c
View File

@ -1153,6 +1153,28 @@ void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
} }
EXPORT_SYMBOL(cfg80211_stop_iface); EXPORT_SYMBOL(cfg80211_stop_iface);
void cfg80211_init_wdev(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev)
{
mutex_init(&wdev->mtx);
INIT_LIST_HEAD(&wdev->event_list);
spin_lock_init(&wdev->event_lock);
INIT_LIST_HEAD(&wdev->mgmt_registrations);
spin_lock_init(&wdev->mgmt_registrations_lock);
/*
* We get here also when the interface changes network namespaces,
* as it's registered into the new one, but we don't want it to
* change ID in that case. Checking if the ID is already assigned
* works, because 0 isn't considered a valid ID and the memory is
* 0-initialized.
*/
if (!wdev->identifier)
wdev->identifier = ++rdev->wdev_id;
list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
rdev->devlist_generation++;
}
static int cfg80211_netdev_notifier_call(struct notifier_block *nb, static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
unsigned long state, void *ptr) unsigned long state, void *ptr)
{ {
@ -1178,23 +1200,7 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
* called within code protected by it when interfaces * called within code protected by it when interfaces
* are added with nl80211. * are added with nl80211.
*/ */
mutex_init(&wdev->mtx); cfg80211_init_wdev(rdev, wdev);
INIT_LIST_HEAD(&wdev->event_list);
spin_lock_init(&wdev->event_lock);
INIT_LIST_HEAD(&wdev->mgmt_registrations);
spin_lock_init(&wdev->mgmt_registrations_lock);
/*
* We get here also when the interface changes network namespaces,
* as it's registered into the new one, but we don't want it to
* change ID in that case. Checking if the ID is already assigned
* works, because 0 isn't considered a valid ID and the memory is
* 0-initialized.
*/
if (!wdev->identifier)
wdev->identifier = ++rdev->wdev_id;
list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
rdev->devlist_generation++;
/* can only change netns with wiphy */ /* can only change netns with wiphy */
dev->features |= NETIF_F_NETNS_LOCAL; dev->features |= NETIF_F_NETNS_LOCAL;

3
net/wireless/core.h
View File

@ -187,6 +187,9 @@ struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
struct net *net); struct net *net);
void cfg80211_init_wdev(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev);
static inline void wdev_lock(struct wireless_dev *wdev) static inline void wdev_lock(struct wireless_dev *wdev)
__acquires(wdev) __acquires(wdev)
{ {

10
net/wireless/nl80211.c
View File

@ -3252,15 +3252,7 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
* P2P Device and NAN do not have a netdev, so don't go * P2P Device and NAN do not have a netdev, so don't go
* through the netdev notifier and must be added here * through the netdev notifier and must be added here
*/ */
mutex_init(&wdev->mtx); cfg80211_init_wdev(rdev, wdev);
INIT_LIST_HEAD(&wdev->event_list);
spin_lock_init(&wdev->event_lock);
INIT_LIST_HEAD(&wdev->mgmt_registrations);
spin_lock_init(&wdev->mgmt_registrations_lock);
wdev->identifier = ++rdev->wdev_id;
list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
rdev->devlist_generation++;
break; break;
default: default:
break; break;