David Vernet 6aed15e330 selftests/bpf: Add testcase for static kfunc with unused arg ... kfuncs are allowed to be static, or not use one or more of their arguments. For example, bpf_xdp_metadata_rx_hash() in net/core/xdp.c is meant to be implemented by drivers, with the default implementation just returning -EOPNOTSUPP. As described in [0], such kfuncs can have their arguments elided, which can cause BTF encoding to be skipped. The new __bpf_kfunc macro should address this, and this patch adds a selftest which verifies that a static kfunc with at least one unused argument can still be encoded and invoked by a BPF program. Signed-off-by: David Vernet <void@manifault.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20230201173016.342758-5-void@manifault.com		2023-02-02 00:25:14 +01:00
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bpf_dummy_struct_ops.c	bpf/selftests: Verify struct_ops prog sleepable behavior	2023-01-25 10:25:57 -08:00
Makefile	bpf: Add dummy BPF STRUCT_OPS for test purpose	2021-11-01 14:10:00 -07:00
test_run.c	selftests/bpf: Add testcase for static kfunc with unused arg	2023-02-02 00:25:14 +01:00