Re: Can DPDK AF_XDP PMD support macvlan driver in container?

[Maryam Tahhan <mtahhan@redhat.com>]

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On 23/10/2024 07:07, Xiaohua Wang wrote:
>
> Hi,
>
> dpdk-testpmd with AF_XDP PMD can't work on p1p1 (macvlan) interface, 
> but can work on eth0 (veth) interface.
>
> And is there a method to enable AF_XDP PMD to work in XDP SKB mode? Or 
> add one option to set “SKB mode” in AF_XDP Options 
> <https://doc.dpdk.org/guides/nics/af_xdp.html> ?
>

[MT] I believe this is what the `force_copy=1` option does. But I'm not 
sure this will fix your issue as the log below says that it does try SKB 
mode. It could be a limitation of the Kernel driver.


> ===============can't work on p1p1 (macvlan) interface====================
>
> 5p8j4:/tmp # ./dpdk-testpmd --log-level=pmd.net.af_xdp:debug --no-huge 
> --no-pci --no-telemetry --vdev net_af_xdp,iface=p1p1 -- 
> --total-num-mbufs 8192
>
> EAL: Detected CPU lcores: 40
>
> EAL: Detected NUMA nodes: 1
>
> EAL: Static memory layout is selected, amount of reserved memory can 
> be adjusted with -m or --socket-mem
>
> EAL: Detected static linkage of DPDK
>
> EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
>
> EAL: Selected IOVA mode 'VA'
>
> EAL: VFIO support initialized
>
> rte_pmd_af_xdp_probe(): Initializing pmd_af_xdp for net_af_xdp
>
> init_internals(): Zero copy between umem and mbuf enabled.
>
> testpmd: create a new mbuf pool <mb_pool_0>: n=8192, size=2176, socket=0
>
> testpmd: preferred mempool ops selected: ring_mp_mc
>
> Warning! port-topology=paired and odd forward ports number, the last 
> port will pair with itself.
>
> Configuring Port 0 (socket 0)
>
> eth_rx_queue_setup(): Set up rx queue, rx queue id: 0, xsk queue id: 0
>
> libbpf: elf: skipping unrecognized data section(8) .xdp_run_config
>
> libbpf: elf: skipping unrecognized data section(9) xdp_metadata
>
> libbpf: elf: skipping unrecognized data section(7) xdp_metadata
>
> libbpf: prog 'xdp_pass': BPF program load failed: Invalid argument
>
> libbpf: prog 'xdp_pass': failed to load: -22
>
> libbpf: failed to load object '/usr/lib64/bpf/xdp-dispatcher.o'
>
> libbpf: elf: skipping unrecognized data section(7) xdp_metadata
>
> libbpf: elf: skipping unrecognized data section(7) xdp_metadata
>
> libbpf: elf: skipping unrecognized data section(7) xdp_metadata
>
> libbpf: Kernel error message: Underlying driver does not support XDP 
> in native mode
>
> libxdp: Error attaching XDP program to ifindex 5: Operation not supported
>
> libxdp: XDP mode not supported; try using SKB mode
>
[MT] Here it attempts SKB mode, then fails

> xsk_configure(): Failed to create xsk socket.
>
> eth_rx_queue_setup(): Failed to configure xdp socket
>
> Fail to configure port 0 rx queues
>
> rte_pmd_af_xdp_remove(): Removing AF_XDP ethdev on numa socket 0
>
> eth_dev_close(): Closing AF_XDP ethdev on numa socket 0
>
> Port 0 is closed
>
> EAL: Error - exiting with code: 1
>
> Cause: Start ports failed
>
> EAL: Already called cleanup
>

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