selftests/xsk: Introduce set_ring_size function with a retry mechanism for handling AF_XDP socket closures

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Introduce a new function, set_ring_size(), to manage asynchronous AF_XDP
socket closure. Retry set_hw_ring_size up to SOCK_RECONF_CTR times if it
fails due to an active AF_XDP socket. Return an error immediately for
non-EBUSY errors. This enhances robustness against asynchronous AF_XDP
socket closures during ring size changes.

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/20240402114529.545475-6-tushar.vyavahare@intel.com

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Tushar Vyavahare 2024-04-02 11:45:27 +00:00 • committed by Daniel Borkmann

parent bee3a7b076

commit 776021e07f

3 changed files with 66 additions and 2 deletions

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2

tools/testing/selftests/bpf/Makefile

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57

tools/testing/selftests/bpf/xskxceiver.c

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9

tools/testing/selftests/bpf/xskxceiver.h

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