Re: [dpdk-dev] mbuf->packet_type

[Levend Sayar <levendsayar@gmail.com>]

Hi all.

Nobody cared about my mail. Am I in the wrong place?
If so, can you forward me to the right place please?

Best,
Levend

On Mon, Nov 2, 2020 at 1:45 PM Levend Sayar <levendsayar@gmail.com> wrote:

> Hi all.
>
> Recently I encountered a dont-know-why issue about mbuf->packet_type.
>
> Two different setups behave differently.
>
> One is a bare metal server, one KVM based OpenStack VM (virtio).
> Both use the uio driver. Namely only hardware is different. Software stack
> is the same.
>
> But this macro does not work on OpenStack platform.
>
> *RTE_ETH_IS_IPV4_HDR(mbuf->packet_type))*
>
> where
>
> *#define  RTE_ETH_IS_IPV4_HDR(ptype) ((ptype) & RTE_PTYPE_L3_IPV4)*
>
> I manually coded to check IPv4 like this:
>
>
>
>
> *struct rte_ether_hdr* ether_hdr = rte_pktmbuf_mtod(mbuf, struct
> rte_ether_hdr*);uint16_t ether_type = N2H16(ether_hdr->ether_type);if
> (likely(ether_type == RTE_ETHER_TYPE_IPV4)) {*
>
> Do you have any idea about this?
> I suppose whoever fills that mbuf data packet_type field is not working in
> a virtual environment.
> Which entity fills that fields? Hardware driver, uio, dpdk?
>
> Best,
> Levend
>