Re: [PATCH bpf-next v4 0/2] selftests/xsk: Add tests for XDP tail adjustment in AF_XDP

[Maciej Fijalkowski <maciej.fijalkowski@intel.com>]

On Fri, Mar 21, 2025 at 12:54:17AM +0000, Tushar Vyavahare wrote:
> 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.
> 
> v2 -> v3:
> 1. Introduce `adjust_value` to replace `count` for clearer communication
>    with userspace.
> 
> v3 -> v4:
> 1. Remove `testapp_adjust_tail_common()`. [Maciej]
> 
> 2. Add comments and modify code for buffer resizing logic in test cases
>    (shrink/grow by specific byte sizes for testing purposes). [Maciej]

Hi BPF maintainers,

could we merge this patch set as i have acked the patches? Or is there
something that stops us? I suppose this might have slipped during the
merge window?

Thanks,
Maciej

> 
> ---
> 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@intel.com>
> 
>  .../selftests/bpf/progs/xsk_xdp_progs.c       |  50 ++++++++
>  tools/testing/selftests/bpf/xsk_xdp_common.h  |   1 +
>  tools/testing/selftests/bpf/xskxceiver.c      | 118 ++++++++++++++++--
>  tools/testing/selftests/bpf/xskxceiver.h      |   2 +
>  4 files changed, 163 insertions(+), 8 deletions(-)
> 
> -- 
> 2.34.1
>