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authorJohannes Berg <johannes.berg@intel.com>2012-06-15 17:23:36 +0400
committerJohannes Berg <johannes.berg@intel.com>2012-07-09 16:51:46 +0400
commit1bf614ef7946436246de3c6a6593ba4799f7bac8 (patch)
tree4731c908ae994bb9c5bd4a4fc0ef1f70956c6da5 /net/wireless
parent89a54e48b9cbb44aed1bf6cd712e087b96b6ae65 (diff)
downloadlinux-1bf614ef7946436246de3c6a6593ba4799f7bac8.tar.xz
nl80211: add NL80211_FLAG_NEED_WDEV
Some nl80211 callbacks will soon need the wdev instead of the netdev, so add NL80211_FLAG_NEED_WDEV to allow them to request that. Add NL80211_FLAG_NEED_WDEV_UP as well which checks the netdev is UP if one exists. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless')
-rw-r--r--net/wireless/nl80211.c57
1 files changed, 39 insertions, 18 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 35a9b15289f1..27cd18e256c5 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -6718,6 +6718,10 @@ static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
#define NL80211_FLAG_CHECK_NETDEV_UP 0x08
#define NL80211_FLAG_NEED_NETDEV_UP (NL80211_FLAG_NEED_NETDEV |\
NL80211_FLAG_CHECK_NETDEV_UP)
+#define NL80211_FLAG_NEED_WDEV 0x10
+/* If a netdev is associated, it must be UP */
+#define NL80211_FLAG_NEED_WDEV_UP (NL80211_FLAG_NEED_WDEV |\
+ NL80211_FLAG_CHECK_NETDEV_UP)
static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
struct genl_info *info)
@@ -6738,7 +6742,8 @@ static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
return PTR_ERR(rdev);
}
info->user_ptr[0] = rdev;
- } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
+ } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
+ ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
mutex_lock(&cfg80211_mutex);
wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
info->attrs);
@@ -6749,31 +6754,39 @@ static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
return PTR_ERR(wdev);
}
- if (!wdev->netdev) {
- mutex_unlock(&cfg80211_mutex);
- if (rtnl)
- rtnl_unlock();
- return -EINVAL;
- }
-
dev = wdev->netdev;
rdev = wiphy_to_dev(wdev->wiphy);
- if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
- !netif_running(dev)) {
- mutex_unlock(&cfg80211_mutex);
- if (rtnl)
- rtnl_unlock();
- return -ENETDOWN;
+ if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
+ if (!dev) {
+ mutex_unlock(&cfg80211_mutex);
+ if (rtnl)
+ rtnl_unlock();
+ return -EINVAL;
+ }
+
+ info->user_ptr[1] = dev;
+ } else {
+ info->user_ptr[1] = wdev;
+ }
+
+ if (dev) {
+ if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
+ !netif_running(dev)) {
+ mutex_unlock(&cfg80211_mutex);
+ if (rtnl)
+ rtnl_unlock();
+ return -ENETDOWN;
+ }
+
+ dev_hold(dev);
}
- dev_hold(dev);
cfg80211_lock_rdev(rdev);
mutex_unlock(&cfg80211_mutex);
info->user_ptr[0] = rdev;
- info->user_ptr[1] = dev;
}
return 0;
@@ -6784,8 +6797,16 @@ static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
{
if (info->user_ptr[0])
cfg80211_unlock_rdev(info->user_ptr[0]);
- if (info->user_ptr[1])
- dev_put(info->user_ptr[1]);
+ if (info->user_ptr[1]) {
+ if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
+ struct wireless_dev *wdev = info->user_ptr[1];
+
+ if (wdev->netdev)
+ dev_put(wdev->netdev);
+ } else {
+ dev_put(info->user_ptr[1]);
+ }
+ }
if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
rtnl_unlock();
}