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

 1// SPDX-License-Identifier: GPL-2.0
 2#include <test_progs.h>
 3#include <network_helpers.h>
 4
 5static void *spin_lock_thread(void *arg)
 6{
 7	__u32 duration, retval;
 8	int err, prog_fd = *(u32 *) arg;
 9
10	err = bpf_prog_test_run(prog_fd, 10000, &pkt_v4, sizeof(pkt_v4),
11				NULL, NULL, &retval, &duration);
12	CHECK(err || retval, "",
13	      "err %d errno %d retval %d duration %d\n",
14	      err, errno, retval, duration);
15	pthread_exit(arg);
16}
17
18static void *parallel_map_access(void *arg)
19{
20	int err, map_fd = *(u32 *) arg;
21	int vars[17], i, j, rnd, key = 0;
22
23	for (i = 0; i < 10000; i++) {
24		err = bpf_map_lookup_elem_flags(map_fd, &key, vars, BPF_F_LOCK);
25		if (CHECK_FAIL(err)) {
26			printf("lookup failed\n");
27			goto out;
28		}
29		if (CHECK_FAIL(vars[0] != 0)) {
30			printf("lookup #%d var[0]=%d\n", i, vars[0]);
31			goto out;
32		}
33		rnd = vars[1];
34		for (j = 2; j < 17; j++) {
35			if (vars[j] == rnd)
36				continue;
37			printf("lookup #%d var[1]=%d var[%d]=%d\n",
38			       i, rnd, j, vars[j]);
39			CHECK_FAIL(vars[j] != rnd);
40			goto out;
41		}
42	}
43out:
44	pthread_exit(arg);
45}
46
47void test_map_lock(void)
48{
49	const char *file = "./test_map_lock.o";
50	int prog_fd, map_fd[2], vars[17] = {};
51	pthread_t thread_id[6];
52	struct bpf_object *obj = NULL;
53	int err = 0, key = 0, i;
54	void *ret;
55
56	err = bpf_prog_load(file, BPF_PROG_TYPE_CGROUP_SKB, &obj, &prog_fd);
57	if (CHECK_FAIL(err)) {
58		printf("test_map_lock:bpf_prog_load errno %d\n", errno);
59		goto close_prog;
60	}
61	map_fd[0] = bpf_find_map(__func__, obj, "hash_map");
62	if (CHECK_FAIL(map_fd[0] < 0))
63		goto close_prog;
64	map_fd[1] = bpf_find_map(__func__, obj, "array_map");
65	if (CHECK_FAIL(map_fd[1] < 0))
66		goto close_prog;
67
68	bpf_map_update_elem(map_fd[0], &key, vars, BPF_F_LOCK);
69
70	for (i = 0; i < 4; i++)
71		if (CHECK_FAIL(pthread_create(&thread_id[i], NULL,
72					      &spin_lock_thread, &prog_fd)))
73			goto close_prog;
74	for (i = 4; i < 6; i++)
75		if (CHECK_FAIL(pthread_create(&thread_id[i], NULL,
76					      &parallel_map_access,
77					      &map_fd[i - 4])))
78			goto close_prog;
79	for (i = 0; i < 4; i++)
80		if (CHECK_FAIL(pthread_join(thread_id[i], &ret) ||
81			       ret != (void *)&prog_fd))
82			goto close_prog;
83	for (i = 4; i < 6; i++)
84		if (CHECK_FAIL(pthread_join(thread_id[i], &ret) ||
85			       ret != (void *)&map_fd[i - 4]))
86			goto close_prog;
87close_prog:
88	bpf_object__close(obj);
89}