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4b30209255
Introduce tail adjustment functionality in xskxceiver using bpf_xdp_adjust_tail(). Add `xsk_xdp_adjust_tail` to modify packet sizes and drop unmodified packets. Implement `is_adjust_tail_supported` to check helper availability. Develop packet resizing tests, including shrinking and growing scenarios, with functions for both single-buffer and multi-buffer cases. Update the test framework to handle various scenarios and adjust MTU settings. These changes enhance the testing of packet tail adjustments, improving AF_XDP framework reliability. Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Signed-off-by: Tushar Vyavahare <tushar.vyavahare@intel.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://patch.msgid.link/20250410033116.173617-3-tushar.vyavahare@intel.com