1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2019 Facebook */
3 #include <test_progs.h>
4
5 /* that's kernel internal BPF_MAX_TRAMP_PROGS define */
6 #define CNT 38
7
test_fexit_stress(void)8 void test_fexit_stress(void)
9 {
10 char test_skb[128] = {};
11 int fexit_fd[CNT] = {};
12 int link_fd[CNT] = {};
13 __u32 duration = 0;
14 char error[4096];
15 __u32 prog_ret;
16 int err, i, filter_fd;
17
18 const struct bpf_insn trace_program[] = {
19 BPF_MOV64_IMM(BPF_REG_0, 0),
20 BPF_EXIT_INSN(),
21 };
22
23 struct bpf_load_program_attr load_attr = {
24 .prog_type = BPF_PROG_TYPE_TRACING,
25 .license = "GPL",
26 .insns = trace_program,
27 .insns_cnt = sizeof(trace_program) / sizeof(struct bpf_insn),
28 .expected_attach_type = BPF_TRACE_FEXIT,
29 };
30
31 const struct bpf_insn skb_program[] = {
32 BPF_MOV64_IMM(BPF_REG_0, 0),
33 BPF_EXIT_INSN(),
34 };
35
36 struct bpf_load_program_attr skb_load_attr = {
37 .prog_type = BPF_PROG_TYPE_SOCKET_FILTER,
38 .license = "GPL",
39 .insns = skb_program,
40 .insns_cnt = sizeof(skb_program) / sizeof(struct bpf_insn),
41 };
42
43 err = libbpf_find_vmlinux_btf_id("bpf_fentry_test1",
44 load_attr.expected_attach_type);
45 if (CHECK(err <= 0, "find_vmlinux_btf_id", "failed: %d\n", err))
46 goto out;
47 load_attr.attach_btf_id = err;
48
49 for (i = 0; i < CNT; i++) {
50 fexit_fd[i] = bpf_load_program_xattr(&load_attr, error, sizeof(error));
51 if (CHECK(fexit_fd[i] < 0, "fexit loaded",
52 "failed: %d errno %d\n", fexit_fd[i], errno))
53 goto out;
54 link_fd[i] = bpf_raw_tracepoint_open(NULL, fexit_fd[i]);
55 if (CHECK(link_fd[i] < 0, "fexit attach failed",
56 "prog %d failed: %d err %d\n", i, link_fd[i], errno))
57 goto out;
58 }
59
60 filter_fd = bpf_load_program_xattr(&skb_load_attr, error, sizeof(error));
61 if (CHECK(filter_fd < 0, "test_program_loaded", "failed: %d errno %d\n",
62 filter_fd, errno))
63 goto out;
64
65 err = bpf_prog_test_run(filter_fd, 1, test_skb, sizeof(test_skb), 0,
66 0, &prog_ret, 0);
67 close(filter_fd);
68 CHECK_FAIL(err);
69 out:
70 for (i = 0; i < CNT; i++) {
71 if (link_fd[i])
72 close(link_fd[i]);
73 if (fexit_fd[i])
74 close(fexit_fd[i]);
75 }
76 }
77