net/mlx5: Add sniffer namespaces

Add sniffer TX and RX namespaces to receive ingoing and outgoing
traffic.

Each outgoing/incoming packet is duplicated and steered to the sniffer
TX/RX namespace in addition to the regular flow.

Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>

3 files changed, 64 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
index ac414b7f366e..f5571a5a57c5 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
@@ -1427,6 +1427,16 @@ struct mlx5_flow_namespace *mlx5_get_flow_namespace(struct mlx5_core_dev *dev,
                         return &steering->esw_ingress_root_ns->ns;
                 else
                         return NULL;
+        case MLX5_FLOW_NAMESPACE_SNIFFER_RX:
+                if (steering->sniffer_rx_root_ns)
+                        return &steering->sniffer_rx_root_ns->ns;
+                else
+                        return NULL;
+        case MLX5_FLOW_NAMESPACE_SNIFFER_TX:
+                if (steering->sniffer_tx_root_ns)
+                        return &steering->sniffer_tx_root_ns->ns;
+                else
+                        return NULL;
         default:
                 return NULL;
         }
@@ -1726,10 +1736,46 @@ void mlx5_cleanup_fs(struct mlx5_core_dev *dev)
         cleanup_root_ns(steering->esw_egress_root_ns);
         cleanup_root_ns(steering->esw_ingress_root_ns);
         cleanup_root_ns(steering->fdb_root_ns);
+        cleanup_root_ns(steering->sniffer_rx_root_ns);
+        cleanup_root_ns(steering->sniffer_tx_root_ns);
         mlx5_cleanup_fc_stats(dev);
         kfree(steering);
 }
 
+static int init_sniffer_tx_root_ns(struct mlx5_flow_steering *steering)
+{
+        struct fs_prio *prio;
+
+        steering->sniffer_tx_root_ns = create_root_ns(steering, FS_FT_SNIFFER_TX);
+        if (!steering->sniffer_tx_root_ns)
+                return -ENOMEM;
+
+        /* Create single prio */
+        prio = fs_create_prio(&steering->sniffer_tx_root_ns->ns, 0, 1);
+        if (IS_ERR(prio)) {
+                cleanup_root_ns(steering->sniffer_tx_root_ns);
+                return PTR_ERR(prio);
+        }
+        return 0;
+}
+
+static int init_sniffer_rx_root_ns(struct mlx5_flow_steering *steering)
+{
+        struct fs_prio *prio;
+
+        steering->sniffer_rx_root_ns = create_root_ns(steering, FS_FT_SNIFFER_RX);
+        if (!steering->sniffer_rx_root_ns)
+                return -ENOMEM;
+
+        /* Create single prio */
+        prio = fs_create_prio(&steering->sniffer_rx_root_ns->ns, 0, 1);
+        if (IS_ERR(prio)) {
+                cleanup_root_ns(steering->sniffer_rx_root_ns);
+                return PTR_ERR(prio);
+        }
+        return 0;
+}
+
 static int init_fdb_root_ns(struct mlx5_flow_steering *steering)
 {
         struct fs_prio *prio;
@@ -1826,6 +1872,18 @@ int mlx5_init_fs(struct mlx5_core_dev *dev)
                 }
         }
 
+        if (MLX5_CAP_FLOWTABLE_SNIFFER_RX(dev, ft_support)) {
+                err = init_sniffer_rx_root_ns(steering);
+                if (err)
+                        goto err;
+        }
+
+        if (MLX5_CAP_FLOWTABLE_SNIFFER_TX(dev, ft_support)) {
+                err = init_sniffer_tx_root_ns(steering);
+                if (err)
+                        goto err;
+        }
+
         return 0;
 err:
         mlx5_cleanup_fs(dev);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
index 23e46e35413f..71ff03bceabb 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
@@ -49,6 +49,8 @@ enum fs_flow_table_type {
         FS_FT_ESW_EGRESS_ACL  = 0x2,
         FS_FT_ESW_INGRESS_ACL = 0x3,
         FS_FT_FDB             = 0X4,
+        FS_FT_SNIFFER_RX        = 0X5,
+        FS_FT_SNIFFER_TX        = 0X6,
 };
 
 enum fs_flow_table_op_mod {
@@ -66,6 +68,8 @@ struct mlx5_flow_steering {
         struct mlx5_flow_root_namespace *fdb_root_ns;
         struct mlx5_flow_root_namespace *esw_egress_root_ns;
         struct mlx5_flow_root_namespace *esw_ingress_root_ns;
+        struct mlx5_flow_root_namespace *sniffer_tx_root_ns;
+        struct mlx5_flow_root_namespace *sniffer_rx_root_ns;
 };
 
 struct fs_node {
diff --git a/include/linux/mlx5/fs.h b/include/linux/mlx5/fs.h
index 8803212fc3aa..93ebc5e21334 100644
--- a/include/linux/mlx5/fs.h
+++ b/include/linux/mlx5/fs.h
@@ -63,6 +63,8 @@ enum mlx5_flow_namespace_type {
         MLX5_FLOW_NAMESPACE_FDB,
         MLX5_FLOW_NAMESPACE_ESW_EGRESS,
         MLX5_FLOW_NAMESPACE_ESW_INGRESS,
+        MLX5_FLOW_NAMESPACE_SNIFFER_RX,
+        MLX5_FLOW_NAMESPACE_SNIFFER_TX,
 };
 
 struct mlx5_flow_table;