[dpdk-stable] [PATCH v2] net/mlx5: fix push VLAN action wrongly use item info

[Raslan Darawsheh]

Hi,

> -----Original Message-----
> From: Xiaoyu Min <jackmin at mellanox.com>
> Sent: Monday, April 13, 2020 6:29 AM
> To: Raslan Darawsheh <rasland at mellanox.com>; Matan Azrad
> <matan at mellanox.com>; Shahaf Shuler <shahafs at mellanox.com>; Slava
> Ovsiienko <viacheslavo at mellanox.com>
> Cc: dev at dpdk.org; stable at dpdk.org; Dekel Peled <dekelp at mellanox.com>
> Subject: [PATCH v2] net/mlx5: fix push VLAN action wrongly use item info
> 
> Currently when PMD create push VLAN action it need to provide VID to HW
> and PMD get VID value from item VLAN in pattern if there is no
> of_set_vlan_vid action following.
> 
> When user create rule like [1], which has of_set_vlan_vid action
> before of_push_vlan, the intention is to modify VID on existing VLAN
> header and push a new VLAN header with VID _inherit_ from the previous
> of_set_vlan_vid.
> 
> Currently the above is not covered by PMD, PMD always fetch the VLAN
> information from item for of_push_vlan action.
> 
> Fix it by only fetch VLAN information from item when there is no
> previous of_set_vlan_vid action.
> 
> [1]: testpmd> flow create 2 ingress transfer group 1 priority 3 pattern
>                 eth / vlan vid is 2731 / ipv4 / end actions
> 		of_set_vlan_vid vlan_vid 3209 / of_push_vlan ethertype
> 		0x88A8 / port_id id 1 / end
> 
> Fixes: b8c0372bc5ac ("net/mlx5: fix set VLAN ID/PCP in new header")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Xiaoyu Min <jackmin at mellanox.com>
> Reviewed-by: Dekel Peled <dekelp at mellanox.com>
> Acked-by: Viacheslav Ovsiienko <viacheslavo at mellanox.com>
> ---
> v2:
>   - rebased
>   - added Acked-by tag
> 
>  drivers/net/mlx5/mlx5_flow_dv.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/mlx5/mlx5_flow_dv.c
> b/drivers/net/mlx5/mlx5_flow_dv.c
> index 18ea577f8c..106d0b9461 100644
> --- a/drivers/net/mlx5/mlx5_flow_dv.c
> +++ b/drivers/net/mlx5/mlx5_flow_dv.c
> @@ -7511,7 +7511,9 @@ __flow_dv_translate(struct rte_eth_dev *dev,
>  			action_flags |=
> MLX5_FLOW_ACTION_OF_POP_VLAN;
>  			break;
>  		case RTE_FLOW_ACTION_TYPE_OF_PUSH_VLAN:
> -			flow_dev_get_vlan_info_from_items(items, &vlan);
> +			if (!(action_flags &
> +			      MLX5_FLOW_ACTION_OF_SET_VLAN_VID))
> +				flow_dev_get_vlan_info_from_items(items,
> &vlan);
>  			vlan.eth_proto = rte_be_to_cpu_16
>  			     ((((const struct rte_flow_action_of_push_vlan *)
>  						   actions->conf)-
> >ethertype));
> --
> 2.26.0


Patch applied to next-net-mlx,

Kindest regards,
Raslan Darawsheh