net/mlx5: Bridge, add tracepoints for multicast

Pass target struct net_device to mdb attach/detach handler in order to
expose the port name to the new tracepoints. Implemented following
tracepoints:

- Attach mdb to port.
- Detach mdb from port.

Usage example:

># cd /sys/kernel/debug/tracing
># echo mlx5:mlx5_esw_bridge_port_mdb_attach >> set_event
># cat trace
...
     kworker/0:0-19071   [000] ..... 259004.253848: mlx5_esw_bridge_port_mdb_attach: net_device=enp8s0f0_0 addr=33:33:ff:00:00:01 vid=0 num_ports=1 offloaded=1
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/en/rep/bridge.c

@@ -238,7 +238,7 @@ mlx5_esw_bridge_port_obj_add(struct net_device *dev,
 		break;
 	case SWITCHDEV_OBJ_ID_PORT_MDB:
 		mdb = SWITCHDEV_OBJ_PORT_MDB(obj);
-		err = mlx5_esw_bridge_port_mdb_add(vport_num, esw_owner_vhca_id, mdb->addr,
+		err = mlx5_esw_bridge_port_mdb_add(dev, vport_num, esw_owner_vhca_id, mdb->addr,
 						   mdb->vid, br_offloads, extack);
 		break;
 	default:
@@ -270,7 +270,7 @@ mlx5_esw_bridge_port_obj_del(struct net_device *dev,
 		break;
 	case SWITCHDEV_OBJ_ID_PORT_MDB:
 		mdb = SWITCHDEV_OBJ_PORT_MDB(obj);
-		mlx5_esw_bridge_port_mdb_del(vport_num, esw_owner_vhca_id, mdb->addr, mdb->vid,
+		mlx5_esw_bridge_port_mdb_del(dev, vport_num, esw_owner_vhca_id, mdb->addr, mdb->vid,
 					     br_offloads);
 		break;
 	default:

drivers/net/ethernet/mellanox/mlx5/core/esw/bridge.c

@@ -1803,8 +1803,9 @@ void mlx5_esw_bridge_update(struct mlx5_esw_bridge_offloads *br_offloads)
 	}
 }
 
-int mlx5_esw_bridge_port_mdb_add(u16 vport_num, u16 esw_owner_vhca_id, const unsigned char *addr,
-				 u16 vid, struct mlx5_esw_bridge_offloads *br_offloads,
+int mlx5_esw_bridge_port_mdb_add(struct net_device *dev, u16 vport_num, u16 esw_owner_vhca_id,
+				 const unsigned char *addr, u16 vid,
+				 struct mlx5_esw_bridge_offloads *br_offloads,
 				 struct netlink_ext_ack *extack)
 {
 	struct mlx5_esw_bridge_vlan *vlan;
@@ -1837,7 +1838,7 @@ int mlx5_esw_bridge_port_mdb_add(u16 vport_num, u16 esw_owner_vhca_id, const uns
 		}
 	}
 
-	err = mlx5_esw_bridge_port_mdb_attach(port, addr, vid);
+	err = mlx5_esw_bridge_port_mdb_attach(dev, port, addr, vid);
 	if (err) {
 		NL_SET_ERR_MSG_FMT_MOD(extack, "Failed to add MDB (MAC=%pM,vid=%u,vport=%u)\n",
 				       addr, vid, vport_num);
@@ -1847,8 +1848,9 @@ int mlx5_esw_bridge_port_mdb_add(u16 vport_num, u16 esw_owner_vhca_id, const uns
 	return 0;
 }
 
-void mlx5_esw_bridge_port_mdb_del(u16 vport_num, u16 esw_owner_vhca_id, const unsigned char *addr,
-				  u16 vid, struct mlx5_esw_bridge_offloads *br_offloads)
+void mlx5_esw_bridge_port_mdb_del(struct net_device *dev, u16 vport_num, u16 esw_owner_vhca_id,
+				  const unsigned char *addr, u16 vid,
+				  struct mlx5_esw_bridge_offloads *br_offloads)
 {
 	struct mlx5_esw_bridge_port *port;
 
@@ -1856,7 +1858,7 @@ void mlx5_esw_bridge_port_mdb_del(u16 vport_num, u16 esw_owner_vhca_id, const un
 	if (!port)
 		return;
 
-	mlx5_esw_bridge_port_mdb_detach(port, addr, vid);
+	mlx5_esw_bridge_port_mdb_detach(dev, port, addr, vid);
 }
 
 static void mlx5_esw_bridge_flush(struct mlx5_esw_bridge_offloads *br_offloads)

drivers/net/ethernet/mellanox/mlx5/core/esw/bridge.h

@@ -79,10 +79,12 @@ int mlx5_esw_bridge_port_vlan_add(u16 vport_num, u16 esw_owner_vhca_id, u16 vid,
 void mlx5_esw_bridge_port_vlan_del(u16 vport_num, u16 esw_owner_vhca_id, u16 vid,
 				   struct mlx5_esw_bridge_offloads *br_offloads);
 
-int mlx5_esw_bridge_port_mdb_add(u16 vport_num, u16 esw_owner_vhca_id, const unsigned char *addr,
-				 u16 vid, struct mlx5_esw_bridge_offloads *br_offloads,
+int mlx5_esw_bridge_port_mdb_add(struct net_device *dev, u16 vport_num, u16 esw_owner_vhca_id,
+				 const unsigned char *addr, u16 vid,
+				 struct mlx5_esw_bridge_offloads *br_offloads,
 				 struct netlink_ext_ack *extack);
-void mlx5_esw_bridge_port_mdb_del(u16 vport_num, u16 esw_owner_vhca_id, const unsigned char *addr,
-				  u16 vid, struct mlx5_esw_bridge_offloads *br_offloads);
+void mlx5_esw_bridge_port_mdb_del(struct net_device *dev, u16 vport_num, u16 esw_owner_vhca_id,
+				  const unsigned char *addr, u16 vid,
+				  struct mlx5_esw_bridge_offloads *br_offloads);
 
 #endif /* __MLX5_ESW_BRIDGE_H__ */

drivers/net/ethernet/mellanox/mlx5/core/esw/bridge_mcast.c

@@ -5,6 +5,7 @@
 #include "bridge.h"
 #include "eswitch.h"
 #include "bridge_priv.h"
+#include "diag/bridge_tracepoint.h"
 
 static const struct rhashtable_params mdb_ht_params = {
 	.key_offset = offsetof(struct mlx5_esw_bridge_mdb_entry, key),
@@ -180,8 +181,8 @@ static void mlx5_esw_bridge_port_mdb_entry_cleanup(struct mlx5_esw_bridge *bridg
 	kvfree(entry);
 }
 
-int mlx5_esw_bridge_port_mdb_attach(struct mlx5_esw_bridge_port *port, const unsigned char *addr,
-				    u16 vid)
+int mlx5_esw_bridge_port_mdb_attach(struct net_device *dev, struct mlx5_esw_bridge_port *port,
+				    const unsigned char *addr, u16 vid)
 {
 	struct mlx5_esw_bridge *bridge = port->bridge;
 	struct mlx5_esw_bridge_mdb_entry *entry;
@@ -224,6 +225,8 @@ int mlx5_esw_bridge_port_mdb_attach(struct mlx5_esw_bridge_port *port, const uns
 		 */
 		esw_warn(bridge->br_offloads->esw->dev, "MDB attach failed to offload (MAC=%pM,vid=%u,vport=%u,err=%d)\n",
 			 addr, vid, port->vport_num, err);
+
+	trace_mlx5_esw_bridge_port_mdb_attach(dev, entry);
 	return 0;
 }
 
@@ -248,8 +251,8 @@ static void mlx5_esw_bridge_port_mdb_entry_detach(struct mlx5_esw_bridge_port *p
 			 entry->key.addr, entry->key.vid, port->vport_num);
 }
 
-void mlx5_esw_bridge_port_mdb_detach(struct mlx5_esw_bridge_port *port, const unsigned char *addr,
-				     u16 vid)
+void mlx5_esw_bridge_port_mdb_detach(struct net_device *dev, struct mlx5_esw_bridge_port *port,
+				     const unsigned char *addr, u16 vid)
 {
 	struct mlx5_esw_bridge *bridge = port->bridge;
 	struct mlx5_esw_bridge_mdb_entry *entry;
@@ -269,6 +272,7 @@ void mlx5_esw_bridge_port_mdb_detach(struct mlx5_esw_bridge_port *port, const un
 		return;
 	}
 
+	trace_mlx5_esw_bridge_port_mdb_detach(dev, entry);
 	mlx5_esw_bridge_port_mdb_entry_detach(port, entry);
 }
 

drivers/net/ethernet/mellanox/mlx5/core/esw/bridge_priv.h

@@ -233,10 +233,10 @@ void mlx5_esw_bridge_mcast_disable(struct mlx5_esw_bridge *bridge);
 
 int mlx5_esw_bridge_mdb_init(struct mlx5_esw_bridge *bridge);
 void mlx5_esw_bridge_mdb_cleanup(struct mlx5_esw_bridge *bridge);
-int mlx5_esw_bridge_port_mdb_attach(struct mlx5_esw_bridge_port *port, const unsigned char *addr,
-				    u16 vid);
-void mlx5_esw_bridge_port_mdb_detach(struct mlx5_esw_bridge_port *port, const unsigned char *addr,
-				     u16 vid);
+int mlx5_esw_bridge_port_mdb_attach(struct net_device *dev, struct mlx5_esw_bridge_port *port,
+				    const unsigned char *addr, u16 vid);
+void mlx5_esw_bridge_port_mdb_detach(struct net_device *dev, struct mlx5_esw_bridge_port *port,
+				     const unsigned char *addr, u16 vid);
 void mlx5_esw_bridge_port_mdb_vlan_flush(struct mlx5_esw_bridge_port *port,
 					 struct mlx5_esw_bridge_vlan *vlan);
 void mlx5_esw_bridge_mdb_flush(struct mlx5_esw_bridge *bridge);

drivers/net/ethernet/mellanox/mlx5/core/esw/diag/bridge_tracepoint.h

@@ -110,6 +110,41 @@ DEFINE_EVENT(mlx5_esw_bridge_port_template,
 	     TP_ARGS(port)
 	);
 
+DECLARE_EVENT_CLASS(mlx5_esw_bridge_mdb_port_change_template,
+		    TP_PROTO(const struct net_device *dev,
+			     const struct mlx5_esw_bridge_mdb_entry *mdb),
+		    TP_ARGS(dev, mdb),
+		    TP_STRUCT__entry(
+			    __array(char, dev_name, IFNAMSIZ)
+			    __array(unsigned char, addr, ETH_ALEN)
+			    __field(u16, vid)
+			    __field(int, num_ports)
+			    __field(bool, offloaded)),
+		    TP_fast_assign(
+			    strscpy(__entry->dev_name, netdev_name(dev), IFNAMSIZ);
+			    memcpy(__entry->addr, mdb->key.addr, ETH_ALEN);
+			    __entry->vid = mdb->key.vid;
+			    __entry->num_ports = mdb->num_ports;
+			    __entry->offloaded = mdb->egress_handle;),
+		    TP_printk("net_device=%s addr=%pM vid=%u num_ports=%d offloaded=%d",
+			      __entry->dev_name,
+			      __entry->addr,
+			      __entry->vid,
+			      __entry->num_ports,
+			      __entry->offloaded));
+
+DEFINE_EVENT(mlx5_esw_bridge_mdb_port_change_template,
+	     mlx5_esw_bridge_port_mdb_attach,
+	     TP_PROTO(const struct net_device *dev,
+		      const struct mlx5_esw_bridge_mdb_entry *mdb),
+	     TP_ARGS(dev, mdb));
+
+DEFINE_EVENT(mlx5_esw_bridge_mdb_port_change_template,
+	     mlx5_esw_bridge_port_mdb_detach,
+	     TP_PROTO(const struct net_device *dev,
+		      const struct mlx5_esw_bridge_mdb_entry *mdb),
+	     TP_ARGS(dev, mdb));
+
 #endif
 
 /* This part must be outside protection */