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: Jakub Kicinski kuba@kernel.org Signed-off-by: Dimitri Daskalakis dimitri.daskalakis1@gmail.com --- tools/testing/selftests/drivers/net/xdp.py | 23 +++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/drivers/net/xdp.py b/tools/testing/selftests/drivers/net/xdp.py index ea4da9024f9f..cea24c9b573e 100755 --- a/tools/testing/selftests/drivers/net/xdp.py +++ b/tools/testing/selftests/drivers/net/xdp.py @@ -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,