1 files changed, 57 insertions, 0 deletions
diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c
new file mode 100644
index 000000000000..f4097b900de1
--- /dev/null
+++ b/net/bridge/br_switchdev.c
@@ -0,0 +1,57 @@
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/skbuff.h>
+#include <net/switchdev.h>
+
+#include "br_private.h"
+
+static int br_switchdev_mark_get(struct net_bridge *br, struct net_device *dev)
+{
+	struct net_bridge_port *p;
+
+	/* dev is yet to be added to the port list. */
+	list_for_each_entry(p, &br->port_list, list) {
+		if (switchdev_port_same_parent_id(dev, p->dev))
+			return p->offload_fwd_mark;
+	}
+
+	return ++br->offload_fwd_mark;
+}
+
+int nbp_switchdev_mark_set(struct net_bridge_port *p)
+{
+	struct switchdev_attr attr = {
+		.orig_dev = p->dev,
+		.id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
+	};
+	int err;
+
+	ASSERT_RTNL();
+
+	err = switchdev_port_attr_get(p->dev, &attr);
+	if (err) {
+		if (err == -EOPNOTSUPP)
+			return 0;
+		return err;
+	}
+
+	p->offload_fwd_mark = br_switchdev_mark_get(p->br, p->dev);
+
+	return 0;
+}
+
+void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
+			      struct sk_buff *skb)
+{
+	if (skb->offload_fwd_mark && !WARN_ON_ONCE(!p->offload_fwd_mark))
+		BR_INPUT_SKB_CB(skb)->offload_fwd_mark = p->offload_fwd_mark;
+}
+
+bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
+				  const struct sk_buff *skb)
+{
+	return !skb->offload_fwd_mark ||
+	       BR_INPUT_SKB_CB(skb)->offload_fwd_mark != p->offload_fwd_mark;
+}