From bbd885b193cc8a651e18eef74f0e094acbc802b8 Mon Sep 17 00:00:00 2001 From: Dimitri Daskalakis Date: Wed, 20 Aug 2025 18:40:23 -0700 Subject: [PATCH] selftests: drv-net: xdp: Validate single-buff XDP_TX in multi-buff mode Validate that drivers with multi-buff XDP programs properly reinitialize xdp_buff between packets. Signed-off-by: Dimitri Daskalakis Link: https://patch.msgid.link/20250821014023.1481662-4-dimitri.daskalakis1@gmail.com Signed-off-by: Jakub Kicinski --- tools/testing/selftests/drivers/net/xdp.py | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/drivers/net/xdp.py b/tools/testing/selftests/drivers/net/xdp.py index cea24c9b573e9..35e9495cd5062 100755 --- a/tools/testing/selftests/drivers/net/xdp.py +++ b/tools/testing/selftests/drivers/net/xdp.py @@ -358,7 +358,10 @@ def test_xdp_native_tx_mb(cfg): """ bpf_info = BPFProgInfo("xdp_prog_frags", "xdp_native.bpf.o", "xdp.frags", 9000) - _test_xdp_native_tx(cfg, bpf_info, [8000]) + # The first packet ensures we exercise the fragmented code path. + # And the subsequent 0-sized packet ensures the driver + # reinitializes xdp_buff correctly. + _test_xdp_native_tx(cfg, bpf_info, [8000, 0]) def _validate_res(res, offset_lst, pkt_sz_lst): -- 2.51.0