Re: [dpdk-dev] [PATCH v5 1/2] ethdev: add packet integrity checks

[Ajit Khaparde <ajit.khaparde@broadcom.com>]

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> > > However, as more and more applications are offloading some or all
> > > logic and action to the HW, there is a need to check the packet
> > > integrity so the right decision can be taken.
> > >
> > > The application logic can be positive meaning if the packet is
> > > valid jump / do  actions, or negative if packet is not valid
> > > jump to SW / do actions (like drop)  a, and add default flow
> > > (match all in low priority) that will direct the miss packet
> > > to the miss path.
> >
> > Unless I missed it,
> > How do you specify the negative case?
> > Can you provide an example as well?
> >
> You can use negative case by setting the bit to zero and the mask bit to 1:
> This example was taken from the testpmd patch:
> flow create 0 ingress pattern integrity value mask 1 value spec 0 / end actions queue index 0 / end
> it matches all invalid packets and forward it to the application.
Thanks Ori.



> > >
> > > Signed-off-by: Ori Kam <orika@nvidia.com>
Acked-by: Ajit Khaparde <ajit.khaparde@broadcom.com>

> > > ---
> > >  doc/guides/prog_guide/rte_flow.rst     | 20 +++++++++++
> > >  doc/guides/rel_notes/release_21_05.rst |  5 +++
> > >  lib/librte_ethdev/rte_flow.h           | 49 ++++++++++++++++++++++++++
> > >  3 files changed, 74 insertions(+)