v4.19.13 snapshot.
diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c
new file mode 100644
index 0000000..d77f807
--- /dev/null
+++ b/net/bridge/br_switchdev.c
@@ -0,0 +1,163 @@
+// SPDX-License-Identifier: GPL-2.0
+#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;
+}
+
+/* Flags that can be offloaded to hardware */
+#define BR_PORT_FLAGS_HW_OFFLOAD (BR_LEARNING | BR_FLOOD | \
+ BR_MCAST_FLOOD | BR_BCAST_FLOOD)
+
+int br_switchdev_set_port_flag(struct net_bridge_port *p,
+ unsigned long flags,
+ unsigned long mask)
+{
+ struct switchdev_attr attr = {
+ .orig_dev = p->dev,
+ .id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT,
+ };
+ int err;
+
+ if (mask & ~BR_PORT_FLAGS_HW_OFFLOAD)
+ return 0;
+
+ err = switchdev_port_attr_get(p->dev, &attr);
+ if (err == -EOPNOTSUPP)
+ return 0;
+ if (err)
+ return err;
+
+ /* Check if specific bridge flag attribute offload is supported */
+ if (!(attr.u.brport_flags_support & mask)) {
+ br_warn(p->br, "bridge flag offload is not supported %u(%s)\n",
+ (unsigned int)p->port_no, p->dev->name);
+ return -EOPNOTSUPP;
+ }
+
+ attr.id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS;
+ attr.flags = SWITCHDEV_F_DEFER;
+ attr.u.brport_flags = flags;
+ err = switchdev_port_attr_set(p->dev, &attr);
+ if (err) {
+ br_warn(p->br, "error setting offload flag on port %u(%s)\n",
+ (unsigned int)p->port_no, p->dev->name);
+ return err;
+ }
+
+ return 0;
+}
+
+static void
+br_switchdev_fdb_call_notifiers(bool adding, const unsigned char *mac,
+ u16 vid, struct net_device *dev,
+ bool added_by_user)
+{
+ struct switchdev_notifier_fdb_info info;
+ unsigned long notifier_type;
+
+ info.addr = mac;
+ info.vid = vid;
+ info.added_by_user = added_by_user;
+ notifier_type = adding ? SWITCHDEV_FDB_ADD_TO_DEVICE : SWITCHDEV_FDB_DEL_TO_DEVICE;
+ call_switchdev_notifiers(notifier_type, dev, &info.info);
+}
+
+void
+br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
+{
+ if (!fdb->dst)
+ return;
+
+ switch (type) {
+ case RTM_DELNEIGH:
+ br_switchdev_fdb_call_notifiers(false, fdb->key.addr.addr,
+ fdb->key.vlan_id,
+ fdb->dst->dev,
+ fdb->added_by_user);
+ break;
+ case RTM_NEWNEIGH:
+ br_switchdev_fdb_call_notifiers(true, fdb->key.addr.addr,
+ fdb->key.vlan_id,
+ fdb->dst->dev,
+ fdb->added_by_user);
+ break;
+ }
+}
+
+int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags)
+{
+ struct switchdev_obj_port_vlan v = {
+ .obj.orig_dev = dev,
+ .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
+ .flags = flags,
+ .vid_begin = vid,
+ .vid_end = vid,
+ };
+
+ return switchdev_port_obj_add(dev, &v.obj);
+}
+
+int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
+{
+ struct switchdev_obj_port_vlan v = {
+ .obj.orig_dev = dev,
+ .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
+ .vid_begin = vid,
+ .vid_end = vid,
+ };
+
+ return switchdev_port_obj_del(dev, &v.obj);
+}