Re: [dpdk-dev] [PATCH v2] net/tap: fix zeroed flow mask configurations

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

On Mon, Aug 06, 2018 at 10:58:47AM +0000, Matan Azrad wrote:
> The rte_flow meaning of zero flow mask configuration is to match all
> the range of the item value.
> For example, the flow eth / ipv4 dst spec 1.2.3.4 dst mask 0.0.0.0
> should much all the ipv4 traffic from the rte_flow API perspective.
> 
> From some kernel perspectives the above rule means to ignore all the
> ipv4 traffic (e.g. Ubuntu 16.04, 4.15.10).
> 
> Due to the fact that the tap PMD should provide the rte_flow meaning,
> it is necessary to ignore the spec in case the mask is zero when it
> forwards such like flows to the kernel.
> So, the above rule should be translated to eth / ipv4 to get the
> correct meaning.
> 
> Ignore spec configurations when the mask is zero.
> 
> Fixes: de96fe68ae95 ("net/tap: add basic flow API patterns and actions")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Matan Azrad <matan@mellanox.com>
> ---
>  drivers/net/tap/tap_flow.c | 18 +++++++++---------
>  1 file changed, 9 insertions(+), 9 deletions(-)
> 
> V2:
> Address Adrien comments to fix also the spec=0 check.

Thanks,

Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>

-- 
Adrien Mazarguil
6WIND