1 // SPDX-License-Identifier: GPL-2.0
2 #include <test_progs.h>
3 #include <network_helpers.h>
4
5 static void *spin_lock_thread(void *arg)
6 {
7 int err, prog_fd = *(u32 *) arg;
8 LIBBPF_OPTS(bpf_test_run_opts, topts,
9 .data_in = &pkt_v4,
10 .data_size_in = sizeof(pkt_v4),
11 .repeat = 10000,
12 );
13
14 err = bpf_prog_test_run_opts(prog_fd, &topts);
15 ASSERT_OK(err, "test_run_opts err");
16 ASSERT_OK(topts.retval, "test_run_opts retval");
17
18 pthread_exit(arg);
19 }
20
21 static void *parallel_map_access(void *arg)
22 {
23 int err, map_fd = *(u32 *) arg;
24 int vars[17], i, j, rnd, key = 0;
25
26 for (i = 0; i < 10000; i++) {
27 err = bpf_map_lookup_elem_flags(map_fd, &key, vars, BPF_F_LOCK);
28 if (CHECK_FAIL(err)) {
29 printf("lookup failed\n");
30 goto out;
31 }
32 if (CHECK_FAIL(vars[0] != 0)) {
33 printf("lookup #%d var[0]=%d\n", i, vars[0]);
34 goto out;
35 }
36 rnd = vars[1];
37 for (j = 2; j < 17; j++) {
38 if (vars[j] == rnd)
39 continue;
40 printf("lookup #%d var[1]=%d var[%d]=%d\n",
41 i, rnd, j, vars[j]);
42 CHECK_FAIL(vars[j] != rnd);
43 goto out;
44 }
45 }
46 out:
47 pthread_exit(arg);
48 }
49
50 void test_map_lock(void)
51 {
52 const char *file = "./test_map_lock.bpf.o";
53 int prog_fd, map_fd[2], vars[17] = {};
54 pthread_t thread_id[6];
55 struct bpf_object *obj = NULL;
56 int err = 0, key = 0, i;
57 void *ret;
58
59 err = bpf_prog_test_load(file, BPF_PROG_TYPE_CGROUP_SKB, &obj, &prog_fd);
60 if (CHECK_FAIL(err)) {
61 printf("test_map_lock:bpf_prog_test_load errno %d\n", errno);
62 goto close_prog;
63 }
64 map_fd[0] = bpf_find_map(__func__, obj, "hash_map");
65 if (CHECK_FAIL(map_fd[0] < 0))
66 goto close_prog;
67 map_fd[1] = bpf_find_map(__func__, obj, "array_map");
68 if (CHECK_FAIL(map_fd[1] < 0))
69 goto close_prog;
70
71 bpf_map_update_elem(map_fd[0], &key, vars, BPF_F_LOCK);
72
73 for (i = 0; i < 4; i++)
74 if (CHECK_FAIL(pthread_create(&thread_id[i], NULL,
75 &spin_lock_thread, &prog_fd)))
76 goto close_prog;
77 for (i = 4; i < 6; i++)
78 if (CHECK_FAIL(pthread_create(&thread_id[i], NULL,
79 ¶llel_map_access,
80 &map_fd[i - 4])))
81 goto close_prog;
82 for (i = 0; i < 4; i++)
83 if (CHECK_FAIL(pthread_join(thread_id[i], &ret) ||
84 ret != (void *)&prog_fd))
85 goto close_prog;
86 for (i = 4; i < 6; i++)
87 if (CHECK_FAIL(pthread_join(thread_id[i], &ret) ||
88 ret != (void *)&map_fd[i - 4]))
89 goto close_prog;
90 close_prog:
91 bpf_object__close(obj);
92 }
93
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