switchdev: Pass original device to port netdev driver

switchdev drivers need to know the netdev on which the switchdev op was
invoked. For example, the STP state of a VLAN interface configured on top
of a port can change while being member in a bridge. In this case, the
underlying driver should only change the STP state of that particular
VLAN and not of all the VLANs configured on the port.

However, current switchdev infrastructure only passes the port netdev down
to the driver. Solve that by passing the original device down to the
driver as part of the required switchdev object / attribute.

This doesn't entail any change in current switchdev drivers. It simply
enables those supporting stacked devices to know the originating device
and act accordingly.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/net/switchdev.h b/include/net/switchdev.h
index 1d22ce9f352e..6612946167fe 100644
--- a/include/net/switchdev.h
+++ b/include/net/switchdev.h
@@ -50,6 +50,7 @@ enum switchdev_attr_id {
 };
 
 struct switchdev_attr {
+	struct net_device *orig_dev;
 	enum switchdev_attr_id id;
 	u32 flags;
 	union {
@@ -68,6 +69,7 @@ enum switchdev_obj_id {
 };
 
 struct switchdev_obj {
+	struct net_device *orig_dev;
 	enum switchdev_obj_id id;
 	u32 flags;
 };