1 // SPDX-License-Identifier: GPL-2.0
2
3 #include <test_progs.h>
4 #include <linux/nbd.h>
5
6 /* NOTE: conflict with other tests. */
serial_test_raw_tp_writable_test_run(void)7 void serial_test_raw_tp_writable_test_run(void)
8 {
9 __u32 duration = 0;
10 char error[4096];
11
12 const struct bpf_insn trace_program[] = {
13 BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
14 BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_6, 0),
15 BPF_MOV64_IMM(BPF_REG_0, 42),
16 BPF_STX_MEM(BPF_W, BPF_REG_6, BPF_REG_0, 0),
17 BPF_EXIT_INSN(),
18 };
19
20 LIBBPF_OPTS(bpf_prog_load_opts, trace_opts,
21 .log_level = 2,
22 .log_buf = error,
23 .log_size = sizeof(error),
24 );
25
26 int bpf_fd = bpf_prog_load(BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE, NULL, "GPL v2",
27 trace_program, sizeof(trace_program) / sizeof(struct bpf_insn),
28 &trace_opts);
29 if (CHECK(bpf_fd < 0, "bpf_raw_tracepoint_writable loaded",
30 "failed: %d errno %d\n", bpf_fd, errno))
31 return;
32
33 const struct bpf_insn skb_program[] = {
34 BPF_MOV64_IMM(BPF_REG_0, 0),
35 BPF_EXIT_INSN(),
36 };
37
38 LIBBPF_OPTS(bpf_prog_load_opts, skb_opts,
39 .log_buf = error,
40 .log_size = sizeof(error),
41 );
42
43 int filter_fd = bpf_prog_load(BPF_PROG_TYPE_SOCKET_FILTER, NULL, "GPL v2",
44 skb_program, sizeof(skb_program) / sizeof(struct bpf_insn),
45 &skb_opts);
46 if (CHECK(filter_fd < 0, "test_program_loaded", "failed: %d errno %d\n",
47 filter_fd, errno))
48 goto out_bpffd;
49
50 int tp_fd = bpf_raw_tracepoint_open("bpf_test_finish", bpf_fd);
51 if (CHECK(tp_fd < 0, "bpf_raw_tracepoint_writable opened",
52 "failed: %d errno %d\n", tp_fd, errno))
53 goto out_filterfd;
54
55 char test_skb[128] = {
56 0,
57 };
58
59 LIBBPF_OPTS(bpf_test_run_opts, topts,
60 .data_in = test_skb,
61 .data_size_in = sizeof(test_skb),
62 .repeat = 1,
63 );
64 int err = bpf_prog_test_run_opts(filter_fd, &topts);
65 CHECK(err != 42, "test_run",
66 "tracepoint did not modify return value\n");
67 CHECK(topts.retval != 0, "test_run_ret",
68 "socket_filter did not return 0\n");
69
70 close(tp_fd);
71
72 err = bpf_prog_test_run_opts(filter_fd, &topts);
73 CHECK(err != 0, "test_run_notrace",
74 "test_run failed with %d errno %d\n", err, errno);
75 CHECK(topts.retval != 0, "test_run_ret_notrace",
76 "socket_filter did not return 0\n");
77
78 out_filterfd:
79 close(filter_fd);
80 out_bpffd:
81 close(bpf_fd);
82 }
83