[dpdk-dev] [PATCH v2] net/i40e: fix qinq flow pattern to allow non full mask

[dpdk-dev] [PATCH v2] net/i40e: fix qinq flow pattern to allow non full mask

[Padraig Connolly]

Issue reported by customer that only full mask was allowed on inner and
outer VLAN tag, thus not allowing mask to set VLAN ID filter only.
Removed check that enforces inner vlan and outer vlan to equal
I40E_TCI_MASK (full mask 0xffff).

Fixes: c2be7f9b232f ("net/i40e: fix parsing QinQ pattern")
Fixes: d37705068ee8 ("net/i40e: parse QinQ pattern")

Cc: bernard.iremonger@intel.com
Cc: stable@dpdk.org

Tested-by: Padraig Connolly <padraig.j.connolly@intel.com>
Signed-off-by: Padraig Connolly <padraig.j.connolly@intel.com>
---
 drivers/net/i40e/i40e_flow.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/net/i40e/i40e_flow.c b/drivers/net/i40e/i40e_flow.c
index adc5da1c5..8e7a9989b 100644
--- a/drivers/net/i40e/i40e_flow.c
+++ b/drivers/net/i40e/i40e_flow.c
@@ -4649,14 +4649,9 @@ i40e_flow_parse_qinq_pattern(__rte_unused struct rte_eth_dev *dev,
 	}
 
 	/* Get filter specification */
-	if ((o_vlan_mask != NULL) && (o_vlan_mask->tci ==
-			rte_cpu_to_be_16(I40E_TCI_MASK)) &&
-			(i_vlan_mask != NULL) &&
-			(i_vlan_mask->tci == rte_cpu_to_be_16(I40E_TCI_MASK))) {
-		filter->outer_vlan = rte_be_to_cpu_16(o_vlan_spec->tci)
-			& I40E_TCI_MASK;
-		filter->inner_vlan = rte_be_to_cpu_16(i_vlan_spec->tci)
-			& I40E_TCI_MASK;
+	if (o_vlan_mask != NULL &&  i_vlan_mask != NULL) {
+		filter->outer_vlan = rte_be_to_cpu_16(o_vlan_spec->tci);
+		filter->inner_vlan = rte_be_to_cpu_16(i_vlan_spec->tci);
 	} else {
 			rte_flow_error_set(error, EINVAL,
 					   RTE_FLOW_ERROR_TYPE_ITEM,
-- 
2.17.1

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Re: [dpdk-dev] [PATCH v2] net/i40e: fix qinq flow pattern to allow non full mask

[Iremonger, Bernard]

Hi Padraig,

> -----Original Message-----
> From: Connolly, Padraig J <padraig.j.connolly@intel.com>
> Sent: Wednesday, October 14, 2020 5:31 PM
> To: Xing, Beilei <beilei.xing@intel.com>
> Cc: dev@dpdk.org; Connolly, Padraig J <padraig.j.connolly@intel.com>;
> Iremonger, Bernard <bernard.iremonger@intel.com>; stable@dpdk.org
> Subject: [PATCH v2] net/i40e: fix qinq flow pattern to allow non full mask
> 
> Issue reported by customer that only full mask was allowed on inner and
> outer VLAN tag, thus not allowing mask to set VLAN ID filter only.
> Removed check that enforces inner vlan and outer vlan to equal
> I40E_TCI_MASK (full mask 0xffff).
> 
> Fixes: c2be7f9b232f ("net/i40e: fix parsing QinQ pattern")
> Fixes: d37705068ee8 ("net/i40e: parse QinQ pattern")
> 
> Cc: bernard.iremonger@intel.com
> Cc: stable@dpdk.org
> 
> Tested-by: Padraig Connolly <padraig.j.connolly@intel.com>
> Signed-off-by: Padraig Connolly <padraig.j.connolly@intel.com>
> ---
>  drivers/net/i40e/i40e_flow.c | 11 +++--------
>  1 file changed, 3 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/net/i40e/i40e_flow.c b/drivers/net/i40e/i40e_flow.c
> index adc5da1c5..8e7a9989b 100644
> --- a/drivers/net/i40e/i40e_flow.c
> +++ b/drivers/net/i40e/i40e_flow.c
> @@ -4649,14 +4649,9 @@ i40e_flow_parse_qinq_pattern(__rte_unused
> struct rte_eth_dev *dev,
>  	}
> 
>  	/* Get filter specification */
> -	if ((o_vlan_mask != NULL) && (o_vlan_mask->tci ==
> -			rte_cpu_to_be_16(I40E_TCI_MASK)) &&
> -			(i_vlan_mask != NULL) &&
> -			(i_vlan_mask->tci ==
> rte_cpu_to_be_16(I40E_TCI_MASK))) {
> -		filter->outer_vlan = rte_be_to_cpu_16(o_vlan_spec->tci)
> -			& I40E_TCI_MASK;
> -		filter->inner_vlan = rte_be_to_cpu_16(i_vlan_spec->tci)
> -			& I40E_TCI_MASK;
> +	if (o_vlan_mask != NULL &&  i_vlan_mask != NULL) {
> +		filter->outer_vlan = rte_be_to_cpu_16(o_vlan_spec->tci);
> +		filter->inner_vlan = rte_be_to_cpu_16(i_vlan_spec->tci);
>  	} else {
>  			rte_flow_error_set(error, EINVAL,
>  					   RTE_FLOW_ERROR_TYPE_ITEM,
> --
> 2.17.1

The following fixes line can be removed:
 Fixes: c2be7f9b232f ("net/i40e: fix parsing QinQ pattern")

As the fix in the above patch is not changed by this fix.

Otherwise 

Acked-by: Bernard Iremonger <bernard.iremonger@intel.com>