1
2
3#include <test_progs.h>
4#include <linux/nbd.h>
5
6void test_raw_tp_writable_test_run(void)
7{
8 __u32 duration = 0;
9 char error[4096];
10
11 const struct bpf_insn trace_program[] = {
12 BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
13 BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_6, 0),
14 BPF_MOV64_IMM(BPF_REG_0, 42),
15 BPF_STX_MEM(BPF_W, BPF_REG_6, BPF_REG_0, 0),
16 BPF_EXIT_INSN(),
17 };
18
19 struct bpf_load_program_attr load_attr = {
20 .prog_type = BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE,
21 .license = "GPL v2",
22 .insns = trace_program,
23 .insns_cnt = sizeof(trace_program) / sizeof(struct bpf_insn),
24 .log_level = 2,
25 };
26
27 int bpf_fd = bpf_load_program_xattr(&load_attr, error, sizeof(error));
28 if (CHECK(bpf_fd < 0, "bpf_raw_tracepoint_writable loaded",
29 "failed: %d errno %d\n", bpf_fd, errno))
30 return;
31
32 const struct bpf_insn skb_program[] = {
33 BPF_MOV64_IMM(BPF_REG_0, 0),
34 BPF_EXIT_INSN(),
35 };
36
37 struct bpf_load_program_attr skb_load_attr = {
38 .prog_type = BPF_PROG_TYPE_SOCKET_FILTER,
39 .license = "GPL v2",
40 .insns = skb_program,
41 .insns_cnt = sizeof(skb_program) / sizeof(struct bpf_insn),
42 };
43
44 int filter_fd =
45 bpf_load_program_xattr(&skb_load_attr, error, sizeof(error));
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 __u32 prog_ret;
60 int err = bpf_prog_test_run(filter_fd, 1, test_skb, sizeof(test_skb), 0,
61 0, &prog_ret, 0);
62 CHECK(err != 42, "test_run",
63 "tracepoint did not modify return value\n");
64 CHECK(prog_ret != 0, "test_run_ret",
65 "socket_filter did not return 0\n");
66
67 close(tp_fd);
68
69 err = bpf_prog_test_run(filter_fd, 1, test_skb, sizeof(test_skb), 0, 0,
70 &prog_ret, 0);
71 CHECK(err != 0, "test_run_notrace",
72 "test_run failed with %d errno %d\n", err, errno);
73 CHECK(prog_ret != 0, "test_run_ret_notrace",
74 "socket_filter did not return 0\n");
75
76out_filterfd:
77 close(filter_fd);
78out_bpffd:
79 close(bpf_fd);
80}
81
