This patch series adds tests to validate the XDP tail adjustment functionality, focusing on its use within the AF_XDP context. The tests verify dynamic packet size manipulation using the bpf_xdp_adjust_tail() helper function, covering both single and multi-buffer scenarios. v1 -> v2: 1. Retain and extend stream replacement: Keep `pkt_stream_replace` unchanged. Add `pkt_stream_replace_ifobject` for targeted ifobject handling. 2. Consolidate patches: Merge patches 2 to 6 for tail adjustment tests and check. --- Patch Summary: 1. Packet stream replacement: Add `pkt_stream_replace_ifobject` to manage packet streams efficiently. 2. Tail adjustment tests and support check: Implement dynamic packet resizing in xskxceiver by adding `xsk_xdp_adjust_tail` and extend this functionality to userspace with `testapp_xdp_adjust_tail` for validation. Ensure support by adding `is_adjust_tail_supported` to verify the availability of `bpf_xdp_adjust_tail()`. Introduce tests for shrinking and growing packets using `bpf_xdp_adjust_tail()`, covering both single and multi-buffer scenarios when used with AF_XDP. --- Tushar Vyavahare (2): selftests/xsk: Add packet stream replacement function selftests/xsk: Add tail adjustment tests and support check Signed-off-by: Tushar Vyavahare <tushar.vyavahare@xxxxxxxxx> .../selftests/bpf/progs/xsk_xdp_progs.c | 48 +++++++ tools/testing/selftests/bpf/xsk_xdp_common.h | 1 + tools/testing/selftests/bpf/xskxceiver.c | 131 ++++++++++++++++-- tools/testing/selftests/bpf/xskxceiver.h | 2 + 4 files changed, 174 insertions(+), 8 deletions(-) -- 2.34.1
