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

[David Marchand]

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


-- 
David Marchand