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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
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Add a new test for testing shared umem feature. This is accomplished by
adding a new XDP program and using the multiple sockets.
The new XDP program redirects the packets based on the destination MAC
address.
Signed-off-by: Tushar Vyavahare <tushar.vyavahare@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Magnus Karlsson <magnus.karlsson@intel.com>
Link: https://lore.kernel.org/bpf/20230927135241.2287547-9-tushar.vyavahare@intel.com
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Rename the header file to a generic name so that it can be used by all
future XDP programs. Ensure that the xsk_xdp_common.h header file includes
include guards.
Signed-off-by: Tushar Vyavahare <tushar.vyavahare@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Magnus Karlsson <magnus.karlsson@intel.com>
Link: https://lore.kernel.org/bpf/20230927135241.2287547-3-tushar.vyavahare@intel.com
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