net: pass changed flags along with NETDEV_CHANGE event

Use new netdevice notifier infrastructure to pass along changed flags.

Signed-off-by: Timo Teräs <timo.teras@iki.fi>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
v2->v3: shortened notifier_info struct name
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 13a3484..8502718 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1604,6 +1604,11 @@ struct netdev_notifier_info {
        struct net_device *dev;
 };
 
+struct netdev_notifier_change_info {
+       struct netdev_notifier_info info; /* must be first */
+       unsigned int flags_changed;
+};
+
 static inline struct net_device *
 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
 {

diff --git a/net/core/dev.c b/net/core/dev.c
index 54fce60..6eb621c 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4771,8 +4771,13 @@ void __dev_notify_flags(struct net_device *dev, unsigned int old_flags)
        }
 
        if (dev->flags & IFF_UP &&
-           (changes & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | IFF_VOLATILE)))
-               call_netdevice_notifiers(NETDEV_CHANGE, dev);
+           (changes & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | IFF_VOLATILE))) {
+               struct netdev_notifier_change_info change_info;
+
+               change_info.flags_changed = changes;
+               call_netdevice_notifiers_info(NETDEV_CHANGE, dev,
+                                             &change_info.info);
+       }
 }
 
 /**