Re: [dpdk-dev] [PATCH] app/testpmd: fix MPLSoUDP encapsulation

[Adrien Mazarguil <adrien.mazarguil@6wind.com>]

On Mon, Nov 19, 2018 at 06:54:50PM +0200, Dekel Peled wrote:
> Set MPLS label value in appropriate location at mplsoudp_encap_conf,
> so it is correctly copied to rte_flow_item_mpls.
> 
> Fixes: a1191d39cb57 ("app/testpmd: add MPLSoUDP encapsulation")
> Cc: orika@mellanox.com
> 
> Signed-off-by: Dekel Peled <dekelp@mellanox.com>
> ---
>  app/test-pmd/cmdline.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
> index 1275074..40e64cc 100644
> --- a/app/test-pmd/cmdline.c
> +++ b/app/test-pmd/cmdline.c
> @@ -15804,10 +15804,10 @@ static void cmd_set_mplsoudp_encap_parsed(void *parsed_result,
>  	struct cmd_set_mplsoudp_encap_result *res = parsed_result;
>  	union {
>  		uint32_t mplsoudp_label;
> -		uint8_t label[3];
> +		uint8_t label[4];
>  	} id = {
>  		.mplsoudp_label =
> -			rte_cpu_to_be_32(res->label) & RTE_BE32(0x00ffffff),
> +			rte_cpu_to_be_32(res->label<<4) & RTE_BE32(0x00ffffff),

Just to be sure, since label is a 20-bit value, isn't the shift supposed to
be 12 bits? In which case that mask is harmless but misleading. How about:

 .mplsoudp_label = rte_cpu_to_be32((res->label & 0xfffff) << 12);

>  	};
>  
>  	if (strcmp(res->mplsoudp, "mplsoudp_encap") == 0)
> -- 
> 1.8.3.1
> 

-- 
Adrien Mazarguil
6WIND