[PATCH net-next V2 07/10] net/switchdev: Export the same parent ID service function

[Saeed Mahameed <saeedm@mellanox.com>]

From: Or Gerlitz <ogerlitz@mellanox.com>

This helper serves to know if two switchdev port netdevices belong to the
same HW ASIC, e.g to figure out if forwarding offload is possible between them.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
---
 include/net/switchdev.h   | 8 ++++++++
 net/switchdev/switchdev.c | 5 +++--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/include/net/switchdev.h b/include/net/switchdev.h
index 985619a..9023e3e 100644
--- a/include/net/switchdev.h
+++ b/include/net/switchdev.h
@@ -227,6 +227,8 @@ void switchdev_port_fwd_mark_set(struct net_device *dev,
 				 struct net_device *group_dev,
 				 bool joining);
 
+bool switchdev_port_same_parent_id(struct net_device *a,
+				   struct net_device *b);
 #else
 
 static inline void switchdev_deferred_process(void)
@@ -351,6 +353,12 @@ static inline void switchdev_port_fwd_mark_set(struct net_device *dev,
 {
 }
 
+static inline bool switchdev_port_same_parent_id(struct net_device *a,
+						 struct net_device *b)
+{
+	return false;
+}
+
 #endif
 
 #endif /* _LINUX_SWITCHDEV_H_ */
diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index 59658b2..a5fc9dd 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -1286,8 +1286,8 @@ void switchdev_fib_ipv4_abort(struct fib_info *fi)
 }
 EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_abort);
 
-static bool switchdev_port_same_parent_id(struct net_device *a,
-					  struct net_device *b)
+bool switchdev_port_same_parent_id(struct net_device *a,
+				   struct net_device *b)
 {
 	struct switchdev_attr a_attr = {
 		.orig_dev = a,
@@ -1323,6 +1323,7 @@ static u32 switchdev_port_fwd_mark_get(struct net_device *dev,
 
 	return dev->ifindex;
 }
+EXPORT_SYMBOL_GPL(switchdev_port_same_parent_id);
 
 static void switchdev_port_fwd_mark_reset(struct net_device *group_dev,
 					  u32 old_mark, u32 *reset_mark)
-- 
2.8.0