[PATCH] net/iavf: fix mask not allowed issue

[Zhang, Qi Z]

> -----Original Message-----
> From: Yang, Qiming <qiming.yang at intel.com>
> Sent: Monday, May 16, 2022 10:03 AM
> To: dev at dpdk.org; Zhang, Qi Z <qi.z.zhang at intel.com>
> Cc: Yang, Qiming <qiming.yang at intel.com>; stable at dpdk.org
> Subject: [PATCH] net/iavf: fix mask not allowed issue
> 

How about "fix invalid flow mask handling"

> Only zero-mask and full-mask for IPv4/UDP/TCP/SCTP addr/port are supported
> in current code. Otherwise will return failure when parse pattern.
> 
> Fixes: d5eb3e600d9e ("net/iavf: support flow director basic rule")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Qiming Yang <qiming.yang at intel.com>
> ---
>  drivers/net/iavf/iavf_fdir.c | 150 +++++++++++++++++++++--------------
>  1 file changed, 89 insertions(+), 61 deletions(-)
> 
> diff --git a/drivers/net/iavf/iavf_fdir.c b/drivers/net/iavf/iavf_fdir.c index
> b63aaca91d..356bca8d41 100644
> --- a/drivers/net/iavf/iavf_fdir.c
> +++ b/drivers/net/iavf/iavf_fdir.c
> @@ -802,6 +802,14 @@ iavf_fdir_parse_pattern(__rte_unused struct
> iavf_adapter *ad,
>  				return -rte_errno;
>  			}
> 
> +			/* Mask for IPv4 src/dst addrs not supported */
> +			if (ipv4_mask->hdr.src_addr &&
> +				ipv4_mask->hdr.src_addr != UINT32_MAX)
> +				return -rte_errno;
> +			if (ipv4_mask->hdr.dst_addr &&
> +				ipv4_mask->hdr.dst_addr != UINT32_MAX)
> +				return -rte_errno;

Do we need to call rte_flow_error_set before return -rte_errno?