Merge branch 'xsk-tailroom-reservation-and-mtu-validation'

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Maciej Fijalkowski says:

====================
xsk: tailroom reservation and MTU validation

here we fix a long-standing issue regarding multi-buffer scenario in ZC
mode - we have not been providing space at the end of the buffer where
multi-buffer XDP works on skb_shared_info. This has been brought to our
attention via [0].

Unaligned mode does not get any specific treatment, it is user's
responsibility to properly handle XSK addresses in queues.

With adjustments included here in this set against xskxceiver I have
been able to pass the full test suite on ice.

[0]: https://community.intel.com/t5/Ethernet-Products/X710-XDP-Packet-Corruption-Issue-DRV-MODE-Zero-Copy-Multi-Buffer/m-p/1724208
====================

Link: https://patch.msgid.link/20260402154958.562179-1-maciej.fijalkowski@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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This commit is contained in:

Jakub Kicinski 2026-04-06 18:43:54 -07:00

parent 1caa871bb0 62838e363e

commit 270c0637b9

10 changed files with 150 additions and 38 deletions

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2

include/net/xdp_sock.h

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23

include/net/xdp_sock_drv.h

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net/xdp/xdp_umem.c

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net/xdp/xsk.c

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net/xdp/xsk_buff_pool.c

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tools/testing/selftests/bpf/prog_tests/test_xsk.c

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tools/testing/selftests/bpf/prog_tests/test_xsk.h

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tools/testing/selftests/bpf/prog_tests/xsk.c

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tools/testing/selftests/bpf/progs/xsk_xdp_progs.c

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tools/testing/selftests/bpf/xskxceiver.c

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