switchdev: introduce switchdev notifier

This patch introduces new notifier for purposes of exposing events which happen
on switch driver side. The consumers of the event messages are mainly involved
masters, namely bridge and ovs.

Suggested-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 31 insertions, 0 deletions

diff --git a/include/net/switchdev.h b/include/net/switchdev.h
index 8a6d1641fd9b..7f8d74372d87 100644
--- a/include/net/switchdev.h
+++ b/include/net/switchdev.h
@@ -11,12 +11,27 @@
 #define _LINUX_SWITCHDEV_H_
 
 #include <linux/netdevice.h>
+#include <linux/notifier.h>
+
+struct netdev_switch_notifier_info {
+        struct net_device *dev;
+};
+
+static inline struct net_device *
+netdev_switch_notifier_info_to_dev(const struct netdev_switch_notifier_info *info)
+{
+        return info->dev;
+}
 
 #ifdef CONFIG_NET_SWITCHDEV
 
 int netdev_switch_parent_id_get(struct net_device *dev,
                                 struct netdev_phys_item_id *psid);
 int netdev_switch_port_stp_update(struct net_device *dev, u8 state);
+int register_netdev_switch_notifier(struct notifier_block *nb);
+int unregister_netdev_switch_notifier(struct notifier_block *nb);
+int call_netdev_switch_notifiers(unsigned long val, struct net_device *dev,
+                                 struct netdev_switch_notifier_info *info);
 
 #else
 
@@ -32,6 +47,22 @@ static inline int netdev_switch_port_stp_update(struct net_device *dev,
         return -EOPNOTSUPP;
 }
 
+static inline int register_netdev_switch_notifier(struct notifier_block *nb)
+{
+        return 0;
+}
+
+static inline int unregister_netdev_switch_notifier(struct notifier_block *nb)
+{
+        return 0;
+}
+
+static inline int call_netdev_switch_notifiers(unsigned long val, struct net_device *dev,
+                                               struct netdev_switch_notifier_info *info);
+{
+        return NOTIFY_DONE;
+}
+
 #endif
 
 #endif /* _LINUX_SWITCHDEV_H_ */