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1bba3b3d37
Add a selftests validating that it's possible to have some struct_ops callback set declaratively, then disable it (by setting to NULL) programmatically. Libbpf should detect that such program should not be loaded. Otherwise, it will unnecessarily fail the loading when the host kernel does not have the type information. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/r/20240428030954.3918764-2-andrii@kernel.org Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
91 lines
1.8 KiB
C
91 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */
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#include <vmlinux.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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#include "../bpf_testmod/bpf_testmod.h"
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char _license[] SEC("license") = "GPL";
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int test_1_result = 0;
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int test_2_result = 0;
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SEC("struct_ops/test_1")
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int BPF_PROG(test_1)
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{
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test_1_result = 0xdeadbeef;
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return 0;
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}
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SEC("struct_ops/test_2")
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void BPF_PROG(test_2, int a, int b)
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{
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test_2_result = a + b;
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}
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SEC("?struct_ops/test_3")
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int BPF_PROG(test_3, int a, int b)
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{
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test_2_result = a + b + 3;
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return a + b + 3;
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}
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SEC(".struct_ops.link")
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struct bpf_testmod_ops testmod_1 = {
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.test_1 = (void *)test_1,
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.test_2 = (void *)test_2,
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.data = 0x1,
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};
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SEC("struct_ops/test_2")
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void BPF_PROG(test_2_v2, int a, int b)
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{
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test_2_result = a * b;
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}
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struct bpf_testmod_ops___v2 {
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int (*test_1)(void);
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void (*test_2)(int a, int b);
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int (*test_maybe_null)(int dummy, struct task_struct *task);
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};
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SEC(".struct_ops.link")
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struct bpf_testmod_ops___v2 testmod_2 = {
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.test_1 = (void *)test_1,
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.test_2 = (void *)test_2_v2,
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};
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struct bpf_testmod_ops___zeroed {
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int (*test_1)(void);
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void (*test_2)(int a, int b);
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int (*test_maybe_null)(int dummy, struct task_struct *task);
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void (*zeroed_op)(int a, int b);
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int zeroed;
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};
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SEC("?struct_ops/test_3")
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int BPF_PROG(zeroed_op)
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{
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return 1;
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}
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SEC(".struct_ops.link")
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struct bpf_testmod_ops___zeroed testmod_zeroed = {
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.test_1 = (void *)test_1,
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.test_2 = (void *)test_2_v2,
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.zeroed_op = (void *)zeroed_op,
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};
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struct bpf_testmod_ops___incompatible {
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int (*test_1)(void);
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void (*test_2)(int *a);
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int data;
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};
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SEC(".struct_ops.link")
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struct bpf_testmod_ops___incompatible testmod_incompatible = {
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.test_1 = (void *)test_1,
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.test_2 = (void *)test_2,
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.data = 3,
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};
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