1 // SPDX-License-Identifier: GPL-2.0
2 #include <test_progs.h>
3
4 void test_task_fd_query_rawtp(void)
5 {
6 const char *file = "./test_get_stack_rawtp.bpf.o";
7 __u64 probe_offset, probe_addr;
8 __u32 len, prog_id, fd_type;
9 struct bpf_object *obj;
10 int efd, err, prog_fd;
11 __u32 duration = 0;
12 char buf[256];
13
14 err = bpf_prog_test_load(file, BPF_PROG_TYPE_RAW_TRACEPOINT, &obj, &prog_fd);
15 if (CHECK(err, "prog_load raw tp", "err %d errno %d\n", err, errno))
16 return;
17
18 efd = bpf_raw_tracepoint_open("sys_enter", prog_fd);
19 if (CHECK(efd < 0, "raw_tp_open", "err %d errno %d\n", efd, errno))
20 goto close_prog;
21
22 /* query (getpid(), efd) */
23 len = sizeof(buf);
24 err = bpf_task_fd_query(getpid(), efd, 0, buf, &len, &prog_id,
25 &fd_type, &probe_offset, &probe_addr);
26 if (CHECK(err < 0, "bpf_task_fd_query", "err %d errno %d\n", err,
27 errno))
28 goto close_prog;
29
30 err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT &&
31 strcmp(buf, "sys_enter") == 0;
32 if (CHECK(!err, "check_results", "fd_type %d tp_name %s\n",
33 fd_type, buf))
34 goto close_prog;
35
36 /* test zero len */
37 len = 0;
38 err = bpf_task_fd_query(getpid(), efd, 0, buf, &len, &prog_id,
39 &fd_type, &probe_offset, &probe_addr);
40 if (CHECK(err < 0, "bpf_task_fd_query (len = 0)", "err %d errno %d\n",
41 err, errno))
42 goto close_prog;
43 err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT &&
44 len == strlen("sys_enter");
45 if (CHECK(!err, "check_results", "fd_type %d len %u\n", fd_type, len))
46 goto close_prog;
47
48 /* test empty buffer */
49 len = sizeof(buf);
50 err = bpf_task_fd_query(getpid(), efd, 0, 0, &len, &prog_id,
51 &fd_type, &probe_offset, &probe_addr);
52 if (CHECK(err < 0, "bpf_task_fd_query (buf = 0)", "err %d errno %d\n",
53 err, errno))
54 goto close_prog;
55 err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT &&
56 len == strlen("sys_enter");
57 if (CHECK(!err, "check_results", "fd_type %d len %u\n", fd_type, len))
58 goto close_prog;
59
60 /* test smaller buffer */
61 len = 3;
62 err = bpf_task_fd_query(getpid(), efd, 0, buf, &len, &prog_id,
63 &fd_type, &probe_offset, &probe_addr);
64 if (CHECK(err >= 0 || errno != ENOSPC, "bpf_task_fd_query (len = 3)",
65 "err %d errno %d\n", err, errno))
66 goto close_prog;
67 err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT &&
68 len == strlen("sys_enter") &&
69 strcmp(buf, "sy") == 0;
70 if (CHECK(!err, "check_results", "fd_type %d len %u\n", fd_type, len))
71 goto close_prog;
72
73 close_prog:
74 bpf_object__close(obj);
75 }
76
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.