Commit d06d70eb authored by Dimitri Daskalakis's avatar Dimitri Daskalakis Committed by Jakub Kicinski
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selftests: drv-net: xdp: Add a single-buffer XDP_TX test. 



Test single-buffer XDP_TX for packets with various payload sizes.
Update the socat TX command to generate packets with 0 length payloads.

Signed-off-by: default avatarDimitri Daskalakis <dimitri.daskalakis1@gmail.com>
Link: https://patch.msgid.link/20250821014023.1481662-3-dimitri.daskalakis1@gmail.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 91aacd8c

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

+22 −1
Original line number Diff line number Diff line
@@ -314,8 +314,13 @@ def _test_xdp_native_tx(cfg, bpf_info, payload_lens): 


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

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



        # Writing zero bytes to stdin gets ignored by socat,

        # but with the shut-null flag socat generates a zero sized packet

        # when the socket is closed.

        tx_cmd_suffix = ",shut-null" if payload_len == 0 else ""

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

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

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



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

            wait_port_listen(port, proto="udp", host=cfg.remote)
@@ -329,6 +334,21 @@ def _test_xdp_native_tx(cfg, bpf_info, payload_lens): 
        ksft_eq(stats[XDPStats.TX.value], expected_pkts, "TX stats mismatch")





def test_xdp_native_tx_sb(cfg):

    """

    Tests the XDP_TX action for a single-buff case.



    Args:

        cfg: Configuration object containing network settings.

    """

    bpf_info = BPFProgInfo("xdp_prog", "xdp_native.bpf.o", "xdp", 1500)



    # Ensure there's enough room for an ETH / IP / UDP header

    pkt_hdr_len = 42 if cfg.addr_ipver == "4" else 62



    _test_xdp_native_tx(cfg, bpf_info, [0, 1500 // 2, 1500 - pkt_hdr_len])





def test_xdp_native_tx_mb(cfg):

    """

    Tests the XDP_TX action for a multi-buff case.
@@ -665,6 +685,7 @@ def main(): 
                test_xdp_native_pass_mb,

                test_xdp_native_drop_sb,

                test_xdp_native_drop_mb,

                test_xdp_native_tx_sb,

                test_xdp_native_tx_mb,

                test_xdp_native_adjst_tail_grow_data,

                test_xdp_native_adjst_tail_shrnk_data,