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. */
7void 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
78out_filterfd:
79	close(filter_fd);
80out_bpffd:
81	close(bpf_fd);
82}
83