netdev - [patch net-next 09/14] mlxsw: spectrum: Adjust FDB notifications for VLAN devices

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Date:	Tue, 15 Dec 2015 16:03:42 +0100
From:	Jiri Pirko <jiri@...nulli.us>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net, idosch@...lanox.com, eladr@...lanox.com,
	yotamg@...lanox.com, ogerlitz@...lanox.com,
	gospo@...ulusnetworks.com, nikolay@...ulusnetworks.com,
	f.fainelli@...il.com, sfeldma@...il.com, john.fastabend@...il.com,
	roopa@...ulusnetworks.com, andrew@...n.ch, kaber@...sh.net,
	stephen@...workplumber.org
Subject: [patch net-next 09/14] mlxsw: spectrum: Adjust FDB notifications for VLAN devices

From: Ido Schimmel <idosch@...lanox.com>

FDB notifications contain the FID and port (or LAG ID) on which the MAC
was learned. In the case of the 802.1Q bridge one can easily derive the
matching VID - as FID equals VID - and generate the appropriate
notification for the software bridge. With VLAN devices this is no
longer the case, as these are associated with a vFID.

Solve that by converting the FID to a vFID and lookup the matching VLAN
device. From that derive the VID and whether learning (and learning
sync) should occur.

Signed-off-by: Ido Schimmel <idosch@...lanox.com>
Signed-off-by: Jiri Pirko <jiri@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum.h     | 25 ++++++++++++++
 .../ethernet/mellanox/mlxsw/spectrum_switchdev.c   | 40 +++++++++++++++++++---
 2 files changed, 61 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
index 809c322..33794f2 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
@@ -73,6 +73,16 @@ static inline u16 mlxsw_sp_vfid_to_fid(u16 vfid)
 	return MLXSW_SP_VFID_BASE + vfid;
 }
 
+static inline u16 mlxsw_sp_fid_to_vfid(u16 fid)
+{
+	return fid - MLXSW_SP_VFID_BASE;
+}
+
+static inline bool mlxsw_sp_fid_is_vfid(u16 fid)
+{
+	return fid >= MLXSW_SP_VFID_BASE;
+}
+
 struct mlxsw_sp {
 	struct {
 		struct list_head list;
@@ -177,6 +187,21 @@ mlxsw_sp_port_vport_find(const struct mlxsw_sp_port *mlxsw_sp_port, u16 vid)
 	return NULL;
 }
 
+static inline struct mlxsw_sp_port *
+mlxsw_sp_port_vport_find_by_vfid(const struct mlxsw_sp_port *mlxsw_sp_port,
+				 u16 vfid)
+{
+	struct mlxsw_sp_port *mlxsw_sp_vport;
+
+	list_for_each_entry(mlxsw_sp_vport, &mlxsw_sp_port->vports_list,
+			    vport.list) {
+		if (mlxsw_sp_vport_vfid_get(mlxsw_sp_vport) == vfid)
+			return mlxsw_sp_vport;
+	}
+
+	return NULL;
+}
+
 enum mlxsw_sp_flood_table {
 	MLXSW_SP_FLOOD_TABLE_UC,
 	MLXSW_SP_FLOOD_TABLE_BM,
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
index 49d5318..e6e5b5e 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
@@ -994,6 +994,24 @@ static void mlxsw_sp_fdb_notify_mac_process(struct mlxsw_sp *mlxsw_sp,
 		return;
 	}
 
+	if (mlxsw_sp_fid_is_vfid(fid)) {
+		u16 vfid = mlxsw_sp_fid_to_vfid(fid);
+		struct mlxsw_sp_port *mlxsw_sp_vport;
+
+		mlxsw_sp_vport = mlxsw_sp_port_vport_find_by_vfid(mlxsw_sp_port,
+								  vfid);
+		if (!mlxsw_sp_vport) {
+			netdev_err(mlxsw_sp_port->dev, "Failed to find a matching vPort following FDB notification\n");
+			return;
+		}
+
+		vid = mlxsw_sp_vport_vid_get(mlxsw_sp_vport);
+		/* Override the physical port with the vPort. */
+		mlxsw_sp_port = mlxsw_sp_vport;
+	} else {
+		vid = fid;
+	}
+
 	err = mlxsw_sp_port_fdb_uc_op(mlxsw_sp_port, mac, fid,
 				      adding && mlxsw_sp_port->learning, true);
 	if (err) {
@@ -1002,8 +1020,6 @@ static void mlxsw_sp_fdb_notify_mac_process(struct mlxsw_sp *mlxsw_sp,
 		return;
 	}
 
-	vid = fid;
-
 	mlxsw_sp_fdb_call_notifiers(mlxsw_sp_port->learning,
 				    mlxsw_sp_port->learning_sync,
 				    adding, mac, vid, mlxsw_sp_port->dev);
@@ -1026,6 +1042,24 @@ static void mlxsw_sp_fdb_notify_mac_lag_process(struct mlxsw_sp *mlxsw_sp,
 		return;
 	}
 
+	if (mlxsw_sp_fid_is_vfid(fid)) {
+		u16 vfid = mlxsw_sp_fid_to_vfid(fid);
+		struct mlxsw_sp_port *mlxsw_sp_vport;
+
+		mlxsw_sp_vport = mlxsw_sp_port_vport_find_by_vfid(mlxsw_sp_port,
+								  vfid);
+		if (!mlxsw_sp_vport) {
+			netdev_err(mlxsw_sp_port->dev, "Failed to find a matching vPort following FDB notification\n");
+			return;
+		}
+
+		vid = mlxsw_sp_vport_vid_get(mlxsw_sp_vport);
+		/* Override the physical port with the vPort. */
+		mlxsw_sp_port = mlxsw_sp_vport;
+	} else {
+		vid = fid;
+	}
+
 	err = mlxsw_sp_port_fdb_uc_lag_op(mlxsw_sp, lag_id, mac, fid,
 					  adding && mlxsw_sp_port->learning,
 					  true);
@@ -1035,8 +1069,6 @@ static void mlxsw_sp_fdb_notify_mac_lag_process(struct mlxsw_sp *mlxsw_sp,
 		return;
 	}
 
-	vid = fid;
-
 	mlxsw_sp_fdb_call_notifiers(mlxsw_sp_port->learning,
 				    mlxsw_sp_port->learning_sync,
 				    adding, mac, vid,
-- 
1.9.3

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