[dpdk-dev] [PATCH] Fix loss of data stored in udata64 mbuf field

[Thomas Monjalon]

04/02/2021 10:17, Michał Krawczyk:
> czw., 4 lut 2021 o 10:01 David Marchand <david.marchand at redhat.com> napisał(a):
> >
> > On Thu, Feb 4, 2021 at 9:52 AM Michal Krawczyk <mk at semihalf.com> wrote:
> > >
> > > DPDK v20.11 removed udata64 field, and changed type of the dynfield1 to
> > > uint32_t.
> > >
> > > Due to define:
> > >   lib/common/pg_compat.h:#define udata64                 dynfield1[0]
> > > the copy of udata64 was in fact copying only the first 32 bits.
> >
> > I did not look at the pktgen code, but directly accessing mbuf field
> > dynfieldX is likely a bug.
> >
> > pktgen should register a dynfield for its own usage to avoid conflicts
> > with other parts of the dpdk.
> > Example of such a conversion to the new mechanism:
> > https://git.dpdk.org/dpdk/commit/?id=eb8258402b3f
> >
> 
> Hi David,
> 
> thanks for pointing this out. I wasn't aware of that, I'll rework my
> fix to satisfy the dynfield requirements.

Sorry for having to say that,
but you are supposed to read the release notes when upgrading.