net/mlx5: fs, add unused destination type

When the caller doesn't pass a destination fs_core will create a unused
rule just so a context can be returned. This unused rule
is zeroed out and its type is 0 which can be mixed up with
MLX5_FLOW_DESTINATION_TYPE_VPORT.

Create a dedicated type to differentiate between the two
named MLX5_FLOW_DESTINATION_TYPE_NONE.
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/diag/fs_tracepoint.c

@@ -259,6 +259,9 @@ const char *parse_fs_dst(struct trace_seq *p,
 	case MLX5_FLOW_DESTINATION_TYPE_PORT:
 		trace_seq_printf(p, "port\n");
 		break;
+	case MLX5_FLOW_DESTINATION_TYPE_NONE:
+		trace_seq_printf(p, "none\n");
+		break;
 	}
 
 	trace_seq_putc(p, 0);

drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c

@@ -455,7 +455,8 @@ static int mlx5_set_extended_dest(struct mlx5_core_dev *dev,
 		return 0;
 
 	list_for_each_entry(dst, &fte->node.children, node.list) {
-		if (dst->dest_attr.type == MLX5_FLOW_DESTINATION_TYPE_COUNTER)
+		if (dst->dest_attr.type == MLX5_FLOW_DESTINATION_TYPE_COUNTER ||
+		    dst->dest_attr.type == MLX5_FLOW_DESTINATION_TYPE_NONE)
 			continue;
 		if ((dst->dest_attr.type == MLX5_FLOW_DESTINATION_TYPE_VPORT ||
 		     dst->dest_attr.type == MLX5_FLOW_DESTINATION_TYPE_UPLINK) &&
@@ -579,6 +580,8 @@ static int mlx5_cmd_set_fte(struct mlx5_core_dev *dev,
 				continue;
 
 			switch (type) {
+			case MLX5_FLOW_DESTINATION_TYPE_NONE:
+				continue;
 			case MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE_NUM:
 				id = dst->dest_attr.ft_num;
 				ifc_type = MLX5_IFC_FLOW_DESTINATION_TYPE_FLOW_TABLE;

drivers/net/ethernet/mellanox/mlx5/core/fs_core.c

@@ -1289,6 +1289,8 @@ static struct mlx5_flow_rule *alloc_rule(struct mlx5_flow_destination *dest)
 	rule->node.type = FS_TYPE_FLOW_DEST;
 	if (dest)
 		memcpy(&rule->dest_attr, dest, sizeof(*dest));
+	else
+		rule->dest_attr.type = MLX5_FLOW_DESTINATION_TYPE_NONE;
 
 	return rule;
 }

drivers/net/ethernet/mellanox/mlx5/core/steering/dr_cmd.c

@@ -604,7 +604,8 @@ static int mlx5dr_cmd_set_extended_dest(struct mlx5_core_dev *dev,
 	if (!(fte->action.action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST))
 		return 0;
 	for (i = 0; i < fte->dests_size; i++) {
-		if (fte->dest_arr[i].type == MLX5_FLOW_DESTINATION_TYPE_COUNTER)
+		if (fte->dest_arr[i].type == MLX5_FLOW_DESTINATION_TYPE_COUNTER ||
+		    fte->dest_arr[i].type == MLX5_FLOW_DESTINATION_TYPE_NONE)
 			continue;
 		if ((fte->dest_arr[i].type == MLX5_FLOW_DESTINATION_TYPE_VPORT ||
 		     fte->dest_arr[i].type == MLX5_FLOW_DESTINATION_TYPE_UPLINK) &&
@@ -727,6 +728,8 @@ int mlx5dr_cmd_set_fte(struct mlx5_core_dev *dev,
 				continue;
 
 			switch (type) {
+			case MLX5_FLOW_DESTINATION_TYPE_NONE:
+				continue;
 			case MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE_NUM:
 				id = fte->dest_arr[i].ft_num;
 				ifc_type = MLX5_IFC_FLOW_DESTINATION_TYPE_FLOW_TABLE;

include/linux/mlx5/fs.h

@@ -41,6 +41,7 @@
 #define MLX5_SET_CFG(p, f, v) MLX5_SET(create_flow_group_in, p, f, v)
 
 enum mlx5_flow_destination_type {
+	MLX5_FLOW_DESTINATION_TYPE_NONE,
 	MLX5_FLOW_DESTINATION_TYPE_VPORT,
 	MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE,
 	MLX5_FLOW_DESTINATION_TYPE_TIR,