Re: [PATCH v7 4/7] net/mlx5: add NVGRE encap action to Direct Verbs

[Shahaf Shuler <shahafs@mellanox.com>]

Wednesday, October 31, 2018 9:11 AM, Dekel Peled:
> Subject: [dpdk-dev] [PATCH v7 4/7] net/mlx5: add NVGRE encap action to
> Direct Verbs
> 
> This patch implements the nvgre encap action in DV flow for MLX5 PMD.
> 
> Signed-off-by: Dekel Peled <dekelp@mellanox.com>
> ---
>  drivers/net/mlx5/mlx5_flow.h    |  4 ++++
>  drivers/net/mlx5/mlx5_flow_dv.c | 37
> ++++++++++++++++++++++++++++++++-----
>  2 files changed, 36 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/net/mlx5/mlx5_flow.h b/drivers/net/mlx5/mlx5_flow.h
> index 8955a12..c03a3af 100644
> --- a/drivers/net/mlx5/mlx5_flow.h
> +++ b/drivers/net/mlx5/mlx5_flow.h
> @@ -94,10 +94,14 @@
>  #define MLX5_FLOW_ACTION_SET_MAC_DST (1u << 21)  #define
> MLX5_FLOW_ACTION_VXLAN_ENCAP (1u << 22)  #define
> MLX5_FLOW_ACTION_VXLAN_DECAP (1u << 23)
> +#define MLX5_FLOW_ACTION_NVGRE_ENCAP (1u << 24)
> 
>  #define MLX5_FLOW_FATE_ACTIONS \
>  	(MLX5_FLOW_ACTION_DROP | MLX5_FLOW_ACTION_QUEUE |
> MLX5_FLOW_ACTION_RSS)
> 
> +#define MLX5_FLOW_ENCAP_ACTIONS	\
> +	(MLX5_FLOW_ACTION_VXLAN_ENCAP |
> MLX5_FLOW_ACTION_NVGRE_ENCAP)
> +
>  #ifndef IPPROTO_MPLS
>  #define IPPROTO_MPLS 137
>  #endif
> diff --git a/drivers/net/mlx5/mlx5_flow_dv.c
> b/drivers/net/mlx5/mlx5_flow_dv.c index 7de65bb..7078397 100644
> --- a/drivers/net/mlx5/mlx5_flow_dv.c
> +++ b/drivers/net/mlx5/mlx5_flow_dv.c
> @@ -126,7 +126,7 @@
>  		return rte_flow_error_set(error, EINVAL,
>  					  RTE_FLOW_ERROR_TYPE_ACTION,
> NULL,
>  					  "can't drop and encap in same
> flow");
> -	if (action_flags & (MLX5_FLOW_ACTION_VXLAN_ENCAP |
> +	if (action_flags & (MLX5_FLOW_ENCAP_ACTIONS |
>  			    MLX5_FLOW_ACTION_VXLAN_DECAP))
>  		return rte_flow_error_set(error, EINVAL,
>  					  RTE_FLOW_ERROR_TYPE_ACTION,
> NULL, @@ -163,7 +163,7 @@
>  		return rte_flow_error_set(error, EINVAL,
>  					  RTE_FLOW_ERROR_TYPE_ACTION,
> NULL,
>  					  "can't drop and decap in same
> flow");
> -	if (action_flags & (MLX5_FLOW_ACTION_VXLAN_ENCAP |
> +	if (action_flags & (MLX5_FLOW_ENCAP_ACTIONS |
>  			    MLX5_FLOW_ACTION_VXLAN_DECAP))
>  		return rte_flow_error_set(error, EINVAL,
>  					  RTE_FLOW_ERROR_TYPE_ACTION,
> NULL, @@ -376,6 +376,20 @@
>  				vxlan->vx_flags =
> 
> 	RTE_BE32(MLX5_VXLAN_GPE_FLAGS);
>  			break;
> +		case RTE_FLOW_ITEM_TYPE_GRE:
> +		case RTE_FLOW_ITEM_TYPE_NVGRE:
> +			if (!ipv4 && !ipv6)
> +				return rte_flow_error_set(error, EINVAL,
> +
> 	RTE_FLOW_ERROR_TYPE_ACTION,
> +						(void *)item->type,
> +						"ip header not found");
> +			if ((ipv4 && !ipv4->next_proto_id) ||
> +			    (ipv6 && !ipv6->proto))
> +				return rte_flow_error_set(error, EINVAL,

Same comment like in the VXLAN-GPE. It is not the ip next proto you need to check it is the GRE protocol. 

> +
> 	RTE_FLOW_ERROR_TYPE_ACTION,
> +						(void *)item->type,
> +						"next protocol not found");
> +			break;
>  		case RTE_FLOW_ITEM_TYPE_VOID:
>  			break;
>  		default:
> @@ -416,7 +430,11 @@
>  	size_t size = 0;
>  	int convert_result = 0;
> 
> -	encap_data = ((const struct rte_flow_action_vxlan_encap *)
> +	if (action->type == RTE_FLOW_ACTION_TYPE_VXLAN_ENCAP)
> +		encap_data = ((const struct rte_flow_action_vxlan_encap *)
> +						action->conf)->definition;
> +	else
> +		encap_data = ((const struct rte_flow_action_nvgre_encap *)
>  						action->conf)->definition;
>  	convert_result = flow_dv_convert_encap_data(encap_data, buf,
>  						    &size, error);
> @@ -705,12 +723,17 @@
>  			++actions_n;
>  			break;
>  		case RTE_FLOW_ACTION_TYPE_VXLAN_ENCAP:
> +		case RTE_FLOW_ACTION_TYPE_NVGRE_ENCAP:
>  			ret =
> flow_dv_validate_action_l2_encap(action_flags,
>  							       actions, attr,
>  							       error);
>  			if (ret < 0)
>  				return ret;
> -			action_flags |=
> MLX5_FLOW_ACTION_VXLAN_ENCAP;
> +			action_flags |= actions->type ==
> +
> 	RTE_FLOW_ACTION_TYPE_VXLAN_ENCAP ?
> +
> 	MLX5_FLOW_ACTION_VXLAN_ENCAP :
> +
> 	MLX5_FLOW_ACTION_NVGRE_ENCAP;
> +
>  			++actions_n;
>  			break;
>  		case RTE_FLOW_ACTION_TYPE_VXLAN_DECAP:
> @@ -1492,6 +1515,7 @@
>  		flow->actions |= MLX5_FLOW_ACTION_RSS;
>  		break;
>  	case RTE_FLOW_ACTION_TYPE_VXLAN_ENCAP:
> +	case RTE_FLOW_ACTION_TYPE_NVGRE_ENCAP:
>  		dev_flow->dv.actions[actions_n].type =
>  			MLX5DV_FLOW_ACTION_IBV_FLOW_ACTION;
>  		dev_flow->dv.actions[actions_n].action = @@ -1501,7
> +1525,10 @@
>  			return -rte_errno;
>  		dev_flow->dv.encap_decap_verbs_action =
>  			dev_flow->dv.actions[actions_n].action;
> -		flow->actions |= MLX5_FLOW_ACTION_VXLAN_ENCAP;
> +		flow->actions |= action->type ==
> +				 RTE_FLOW_ACTION_TYPE_VXLAN_ENCAP ?
> +				 MLX5_FLOW_ACTION_VXLAN_ENCAP :
> +				 MLX5_FLOW_ACTION_NVGRE_ENCAP;
>  		actions_n++;
>  		break;
>  	case RTE_FLOW_ACTION_TYPE_VXLAN_DECAP:
> --
> 1.8.3.1