[dpdk-dev] [PATCH] doc: add Linux flower support check in TAP guide

[Pascal Mazon]

Acked-by: Pascal Mazon <pascal.mazon at 6wind.com>

On 20/09/2017 15:03, Thomas Monjalon wrote:
> The flow API is supported in TAP PMD if flower is supported in Linux.
> Some commands are combined to suggest a convenient check of its support
> by the running kernel.
>
> Signed-off-by: Thomas Monjalon <thomas at monjalon.net>
> ---
>  doc/guides/nics/tap.rst | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/doc/guides/nics/tap.rst b/doc/guides/nics/tap.rst
> index f3ee95d28..04086b110 100644
> --- a/doc/guides/nics/tap.rst
> +++ b/doc/guides/nics/tap.rst
> @@ -113,7 +113,14 @@ Flow API support
>  ----------------
>  
>  The tap PMD supports major flow API pattern items and actions, when running on
> -linux kernels above 4.2 ("Flower" classifier required). Supported items:
> +linux kernels above 4.2 ("Flower" classifier required).
> +The kernel support can be checked with this command::
> +
> +   zcat /proc/config.gz | ( grep 'CLS_FLOWER=' || echo 'not supported' ) |
> +   tee -a /dev/stderr | grep -q '=m' &&
> +   lsmod | ( grep cls_flower || echo 'try modprobe cls_flower' )
> +
> +Supported items:
>  
>  - eth: src and dst (with variable masks), and eth_type (0xffff mask).
>  - vlan: vid, pcp, tpid, but not eid. (requires kernel 4.9)