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authorJohannes Berg <johannes@sipsolutions.net>2009-05-30 01:39:53 +0200
committerJohn W. Linville <linville@tuxdriver.com>2009-06-03 14:05:12 -0400
commit3b8bcfd5d31ea0fec58681d035544ace707d2536 (patch)
treecdb845275acea5a367bd9f17ce07c1a5ab4f19fa /net/core/dev.c
parentbdf6d32f933bf28dfdca325281ee5266c753dc67 (diff)
net: introduce pre-up netdev notifier
NETDEV_UP is called after the device is set UP, but sometimes it is useful to be able to veto the device UP. Introduce a new NETDEV_PRE_UP notifier that can be used for exactly this. The first use case will be cfg80211 denying interfaces to be set UP if the device is known to be rfkill'ed. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/core/dev.c')
-rw-r--r--net/core/dev.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 34b49a6a22f..1f38401fc02 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1048,7 +1048,7 @@ void dev_load(struct net *net, const char *name)
int dev_open(struct net_device *dev)
{
const struct net_device_ops *ops = dev->netdev_ops;
- int ret = 0;
+ int ret;
ASSERT_RTNL();
@@ -1065,6 +1065,11 @@ int dev_open(struct net_device *dev)
if (!netif_device_present(dev))
return -ENODEV;
+ ret = call_netdevice_notifiers(NETDEV_PRE_UP, dev);
+ ret = notifier_to_errno(ret);
+ if (ret)
+ return ret;
+
/*
* Call device private open method
*/