1 // SPDX-License-Identifier: GPL-2.0
2
3 #include <test_progs.h>
4 #include <linux/nbd.h>
5 #include "bpf_util.h"
6
7 /* NOTE: conflict with other tests. */
serial_test_raw_tp_writable_test_run(void)8 void serial_test_raw_tp_writable_test_run(void)
9 {
10 __u32 duration = 0;
11 char error[4096];
12
13 const struct bpf_insn trace_program[] = {
14 BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
15 BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_6, 0),
16 BPF_MOV64_IMM(BPF_REG_0, 42),
17 BPF_STX_MEM(BPF_W, BPF_REG_6, BPF_REG_0, 0),
18 BPF_EXIT_INSN(),
19 };
20
21 LIBBPF_OPTS(bpf_prog_load_opts, trace_opts,
22 .log_level = 2,
23 .log_buf = error,
24 .log_size = sizeof(error),
25 );
26
27 int bpf_fd = bpf_prog_load(BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE, NULL, "GPL v2",
28 trace_program, ARRAY_SIZE(trace_program),
29 &trace_opts);
30 if (CHECK(bpf_fd < 0, "bpf_raw_tracepoint_writable loaded",
31 "failed: %d errno %d\n", bpf_fd, errno))
32 return;
33
34 const struct bpf_insn skb_program[] = {
35 BPF_MOV64_IMM(BPF_REG_0, 0),
36 BPF_EXIT_INSN(),
37 };
38
39 LIBBPF_OPTS(bpf_prog_load_opts, skb_opts,
40 .log_buf = error,
41 .log_size = sizeof(error),
42 );
43
44 int filter_fd = bpf_prog_load(BPF_PROG_TYPE_SOCKET_FILTER, NULL, "GPL v2",
45 skb_program, ARRAY_SIZE(skb_program),
46 &skb_opts);
47 if (CHECK(filter_fd < 0, "test_program_loaded", "failed: %d errno %d\n",
48 filter_fd, errno))
49 goto out_bpffd;
50
51 int tp_fd = bpf_raw_tracepoint_open("bpf_test_finish", bpf_fd);
52 if (CHECK(tp_fd < 0, "bpf_raw_tracepoint_writable opened",
53 "failed: %d errno %d\n", tp_fd, errno))
54 goto out_filterfd;
55
56 char test_skb[128] = {
57 0,
58 };
59
60 LIBBPF_OPTS(bpf_test_run_opts, topts,
61 .data_in = test_skb,
62 .data_size_in = sizeof(test_skb),
63 .repeat = 1,
64 );
65 int err = bpf_prog_test_run_opts(filter_fd, &topts);
66 CHECK(err != 42, "test_run",
67 "tracepoint did not modify return value\n");
68 CHECK(topts.retval != 0, "test_run_ret",
69 "socket_filter did not return 0\n");
70
71 close(tp_fd);
72
73 err = bpf_prog_test_run_opts(filter_fd, &topts);
74 CHECK(err != 0, "test_run_notrace",
75 "test_run failed with %d errno %d\n", err, errno);
76 CHECK(topts.retval != 0, "test_run_ret_notrace",
77 "socket_filter did not return 0\n");
78
79 out_filterfd:
80 close(filter_fd);
81 out_bpffd:
82 close(bpf_fd);
83 }
84