31122b2f76
Running a BPF_PROG_TYPE_STRUCT_OPS prog for dummy_st_ops::test_N() through bpf_prog_test_run(). Four test cases are added: (1) attach dummy_st_ops should fail (2) function return value of bpf_dummy_ops::test_1() is expected (3) pointer argument of bpf_dummy_ops::test_1() works as expected (4) multiple arguments passed to bpf_dummy_ops::test_2() are correct Signed-off-by: Hou Tao <houtao1@huawei.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20211025064025.2567443-5-houtao1@huawei.com
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (C) 2021. Huawei Technologies Co., Ltd */
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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struct bpf_dummy_ops_state {
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int val;
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} __attribute__((preserve_access_index));
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struct bpf_dummy_ops {
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int (*test_1)(struct bpf_dummy_ops_state *state);
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int (*test_2)(struct bpf_dummy_ops_state *state, int a1, unsigned short a2,
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char a3, unsigned long a4);
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};
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char _license[] SEC("license") = "GPL";
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SEC("struct_ops/test_1")
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int BPF_PROG(test_1, struct bpf_dummy_ops_state *state)
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{
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int ret;
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if (!state)
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return 0xf2f3f4f5;
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ret = state->val;
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state->val = 0x5a;
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return ret;
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}
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__u64 test_2_args[5];
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SEC("struct_ops/test_2")
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int BPF_PROG(test_2, struct bpf_dummy_ops_state *state, int a1, unsigned short a2,
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char a3, unsigned long a4)
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{
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test_2_args[0] = (unsigned long)state;
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test_2_args[1] = a1;
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test_2_args[2] = a2;
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test_2_args[3] = a3;
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test_2_args[4] = a4;
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return 0;
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}
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SEC(".struct_ops")
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struct bpf_dummy_ops dummy_1 = {
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.test_1 = (void *)test_1,
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.test_2 = (void *)test_2,
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};
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