Commit 91aacd8c authored by Dimitri Daskalakis's avatar Dimitri Daskalakis Committed by Jakub Kicinski
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selftests: drv-net: xdp: Extract common XDP_TX setup/validation. 



In preparation of single-buffer XDP_TX tests, refactor common test code
into the _test_xdp_native_tx method. Add support for multiple payload
sizes, and additional validation for RX packet count. Pass the -n flag
to echo to avoid adding an extra byte into the TX packet.

Signed-off-by: default avatarDimitri Daskalakis <dimitri.daskalakis1@gmail.com>
Link: https://patch.msgid.link/20250821014023.1481662-2-dimitri.daskalakis1@gmail.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent a7bd7215

tools/testing/selftests/drivers/net/xdp.py

+34 −13
Original line number Diff line number Diff line
@@ -290,34 +290,55 @@ def test_xdp_native_drop_mb(cfg): 
    _test_drop(cfg, bpf_info, 8000)





def test_xdp_native_tx_mb(cfg):

def _test_xdp_native_tx(cfg, bpf_info, payload_lens):

    """

    Tests the XDP_TX action for a multi-buff case.

    Tests the XDP_TX action.



    Args:

        cfg: Configuration object containing network settings.

        bpf_info: BPFProgInfo object containing the BPF program metadata.

        payload_lens: Array of packet lengths to send.

    """

    cfg.require_cmd("socat", remote=True)



    bpf_info = BPFProgInfo("xdp_prog_frags", "xdp_native.bpf.o", "xdp.frags", 9000)

    prog_info = _load_xdp_prog(cfg, bpf_info)

    port = rand_port()



    _set_xdp_map("map_xdp_setup", TestConfig.MODE.value, XDPAction.TX.value)

    _set_xdp_map("map_xdp_setup", TestConfig.PORT.value, port)



    test_string = ''.join(random.choice(string.ascii_lowercase) for _ in range(8000))

    rx_udp = f"socat -{cfg.addr_ipver} -T 2 -u UDP-RECV:{port},reuseport STDOUT"

    tx_udp = f"echo {test_string} | socat -t 2 -u STDIN UDP:{cfg.baddr}:{port}"

    expected_pkts = 0

    for payload_len in payload_lens:

        test_string = "".join(

            random.choice(string.ascii_lowercase) for _ in range(payload_len)

        )



        rx_udp = f"socat -{cfg.addr_ipver} -T 2 " + \

                 f"-u UDP-RECV:{port},reuseport STDOUT"

        tx_udp = f"echo -n {test_string} | socat -t 2 " + \

                 f"-u STDIN UDP:{cfg.baddr}:{port}"



        with bkg(rx_udp, host=cfg.remote, exit_wait=True) as rnc:

            wait_port_listen(port, proto="udp", host=cfg.remote)

            cmd(tx_udp, host=cfg.remote, shell=True)



    stats = _get_stats(prog_info['maps']['map_xdp_stats'])



        ksft_eq(rnc.stdout.strip(), test_string, "UDP packet exchange failed")

    ksft_eq(stats[XDPStats.TX.value], 1, "TX stats mismatch")



        expected_pkts += 1

        stats = _get_stats(prog_info["maps"]["map_xdp_stats"])

        ksft_eq(stats[XDPStats.RX.value], expected_pkts, "RX stats mismatch")

        ksft_eq(stats[XDPStats.TX.value], expected_pkts, "TX stats mismatch")





def test_xdp_native_tx_mb(cfg):

    """

    Tests the XDP_TX action for a multi-buff case.



    Args:

        cfg: Configuration object containing network settings.

    """

    bpf_info = BPFProgInfo("xdp_prog_frags", "xdp_native.bpf.o",

                           "xdp.frags", 9000)

    _test_xdp_native_tx(cfg, bpf_info, [8000])





def _validate_res(res, offset_lst, pkt_sz_lst):