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

[Thomas Monjalon]

06/08/2018 15:16, Adrien Mazarguil:
> 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 at dpdk.org
> > 
> > Signed-off-by: Matan Azrad <matan at 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 at 6wind.com>

Applied, thanks