Commit 2a4ca46b authored by Andrii Nakryiko's avatar Andrii Nakryiko Committed by Daniel Borkmann
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selftests/bpf: Use both syntaxes for field-based CO-RE helpers 



Excercise both supported forms of bpf_core_field_exists() and
bpf_core_field_size() helpers: variable-based field reference and
type/field name-based one.

Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220509004148.1801791-5-andrii@kernel.org
parent 73d0280f

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

+5 −6
Original line number Diff line number Diff line
@@ -45,35 +45,34 @@ int test_core_existence(void *ctx) 
	struct core_reloc_existence_output *out = (void *)&data.out;



	out->a_exists = bpf_core_field_exists(in->a);

	if (bpf_core_field_exists(in->a))

	if (bpf_core_field_exists(struct core_reloc_existence, a))

		out->a_value = BPF_CORE_READ(in, a);

	else

		out->a_value = 0xff000001u;



	out->b_exists = bpf_core_field_exists(in->b);

	if (bpf_core_field_exists(in->b))

	if (bpf_core_field_exists(struct core_reloc_existence, b))

		out->b_value = BPF_CORE_READ(in, b);

	else

		out->b_value = 0xff000002u;



	out->c_exists = bpf_core_field_exists(in->c);

	if (bpf_core_field_exists(in->c))

	if (bpf_core_field_exists(struct core_reloc_existence, c))

		out->c_value = BPF_CORE_READ(in, c);

	else

		out->c_value = 0xff000003u;



	out->arr_exists = bpf_core_field_exists(in->arr);

	if (bpf_core_field_exists(in->arr))

	if (bpf_core_field_exists(struct core_reloc_existence, arr))

		out->arr_value = BPF_CORE_READ(in, arr[0]);

	else

		out->arr_value = 0xff000004u;



	out->s_exists = bpf_core_field_exists(in->s);

	if (bpf_core_field_exists(in->s))

	if (bpf_core_field_exists(struct core_reloc_existence, s))

		out->s_value = BPF_CORE_READ(in, s.x);

	else

		out->s_value = 0xff000005u;



	return 0;

}

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

+4 −4
Original line number Diff line number Diff line
@@ -44,10 +44,10 @@ int test_core_size(void *ctx) 
	out->struct_sz = bpf_core_field_size(in->struct_field);

	out->union_sz = bpf_core_field_size(in->union_field);

	out->arr_sz = bpf_core_field_size(in->arr_field);

	out->arr_elem_sz = bpf_core_field_size(in->arr_field[0]);

	out->ptr_sz = bpf_core_field_size(in->ptr_field);

	out->enum_sz = bpf_core_field_size(in->enum_field);

	out->float_sz = bpf_core_field_size(in->float_field);

	out->arr_elem_sz = bpf_core_field_size(struct core_reloc_size, arr_field[0]);

	out->ptr_sz = bpf_core_field_size(struct core_reloc_size, ptr_field);

	out->enum_sz = bpf_core_field_size(struct core_reloc_size, enum_field);

	out->float_sz = bpf_core_field_size(struct core_reloc_size, float_field);



	return 0;

}