1// SPDX-License-Identifier: GPL-2.0-only
 2/* Copyright (c) 2019 Facebook */
 3#include <test_progs.h>
 4#include <linux/bpf.h>
 5#include "bpf/libbpf_internal.h"
 6#include "test_raw_tp_test_run.skel.h"
 7
 8static int duration;
 9
10void test_raw_tp_test_run(void)
11{
12	struct bpf_prog_test_run_attr test_attr = {};
13	int comm_fd = -1, err, nr_online, i, prog_fd;
14	__u64 args[2] = {0x1234ULL, 0x5678ULL};
15	int expected_retval = 0x1234 + 0x5678;
16	struct test_raw_tp_test_run *skel;
17	char buf[] = "new_name";
18	bool *online = NULL;
19	DECLARE_LIBBPF_OPTS(bpf_test_run_opts, opts,
20			    .ctx_in = args,
21			    .ctx_size_in = sizeof(args),
22			    .flags = BPF_F_TEST_RUN_ON_CPU,
23		);
24
25	err = parse_cpu_mask_file("/sys/devices/system/cpu/online", &online,
26				  &nr_online);
27	if (CHECK(err, "parse_cpu_mask_file", "err %d\n", err))
28		return;
29
30	skel = test_raw_tp_test_run__open_and_load();
31	if (CHECK(!skel, "skel_open", "failed to open skeleton\n"))
32		goto cleanup;
33
34	err = test_raw_tp_test_run__attach(skel);
35	if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err))
36		goto cleanup;
37
38	comm_fd = open("/proc/self/comm", O_WRONLY|O_TRUNC);
39	if (CHECK(comm_fd < 0, "open /proc/self/comm", "err %d\n", errno))
40		goto cleanup;
41
42	err = write(comm_fd, buf, sizeof(buf));
43	CHECK(err < 0, "task rename", "err %d", errno);
44
45	CHECK(skel->bss->count == 0, "check_count", "didn't increase\n");
46	CHECK(skel->data->on_cpu != 0xffffffff, "check_on_cpu", "got wrong value\n");
47
48	prog_fd = bpf_program__fd(skel->progs.rename);
49	test_attr.prog_fd = prog_fd;
50	test_attr.ctx_in = args;
51	test_attr.ctx_size_in = sizeof(__u64);
52
53	err = bpf_prog_test_run_xattr(&test_attr);
54	CHECK(err == 0, "test_run", "should fail for too small ctx\n");
55
56	test_attr.ctx_size_in = sizeof(args);
57	err = bpf_prog_test_run_xattr(&test_attr);
58	CHECK(err < 0, "test_run", "err %d\n", errno);
59	CHECK(test_attr.retval != expected_retval, "check_retval",
60	      "expect 0x%x, got 0x%x\n", expected_retval, test_attr.retval);
61
62	for (i = 0; i < nr_online; i++) {
63		if (!online[i])
64			continue;
65
66		opts.cpu = i;
67		opts.retval = 0;
68		err = bpf_prog_test_run_opts(prog_fd, &opts);
69		CHECK(err < 0, "test_run_opts", "err %d\n", errno);
70		CHECK(skel->data->on_cpu != i, "check_on_cpu",
71		      "expect %d got %d\n", i, skel->data->on_cpu);
72		CHECK(opts.retval != expected_retval,
73		      "check_retval", "expect 0x%x, got 0x%x\n",
74		      expected_retval, opts.retval);
75	}
76
77	/* invalid cpu ID should fail with ENXIO */
78	opts.cpu = 0xffffffff;
79	err = bpf_prog_test_run_opts(prog_fd, &opts);
80	CHECK(err >= 0 || errno != ENXIO,
81	      "test_run_opts_fail",
82	      "should failed with ENXIO\n");
83
84	/* non-zero cpu w/o BPF_F_TEST_RUN_ON_CPU should fail with EINVAL */
85	opts.cpu = 1;
86	opts.flags = 0;
87	err = bpf_prog_test_run_opts(prog_fd, &opts);
88	CHECK(err >= 0 || errno != EINVAL,
89	      "test_run_opts_fail",
90	      "should failed with EINVAL\n");
91
92cleanup:
93	close(comm_fd);
94	test_raw_tp_test_run__destroy(skel);
95	free(online);
96}