summaryrefslogtreecommitdiff
path: root/tools/testing/selftests/bpf/test_tcpbpf_user.c
blob: e6eebda7d112b771de662c5b970c0848186595ef (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
// SPDX-License-Identifier: GPL-2.0
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <linux/bpf.h>
#include <sys/types.h>
#include <bpf/bpf.h>
#include <bpf/libbpf.h>

#include "bpf_rlimit.h"
#include "bpf_util.h"
#include "cgroup_helpers.h"

#include "test_tcpbpf.h"

#define EXPECT_EQ(expected, actual, fmt)			\
	do {							\
		if ((expected) != (actual)) {			\
			printf("  Value of: " #actual "\n"	\
			       "    Actual: %" fmt "\n"		\
			       "  Expected: %" fmt "\n",	\
			       (actual), (expected));		\
			goto err;				\
		}						\
	} while (0)

int verify_result(const struct tcpbpf_globals *result)
{
	__u32 expected_events;

	expected_events = ((1 << BPF_SOCK_OPS_TIMEOUT_INIT) |
			   (1 << BPF_SOCK_OPS_RWND_INIT) |
			   (1 << BPF_SOCK_OPS_TCP_CONNECT_CB) |
			   (1 << BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB) |
			   (1 << BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB) |
			   (1 << BPF_SOCK_OPS_NEEDS_ECN) |
			   (1 << BPF_SOCK_OPS_STATE_CB) |
			   (1 << BPF_SOCK_OPS_TCP_LISTEN_CB));

	EXPECT_EQ(expected_events, result->event_map, "#" PRIx32);
	EXPECT_EQ(501ULL, result->bytes_received, "llu");
	EXPECT_EQ(1002ULL, result->bytes_acked, "llu");
	EXPECT_EQ(1, result->data_segs_in, PRIu32);
	EXPECT_EQ(1, result->data_segs_out, PRIu32);
	EXPECT_EQ(0x80, result->bad_cb_test_rv, PRIu32);
	EXPECT_EQ(0, result->good_cb_test_rv, PRIu32);
	EXPECT_EQ(1, result->num_listen, PRIu32);

	return 0;
err:
	return -1;
}

int verify_sockopt_result(int sock_map_fd)
{
	__u32 key = 0;
	int res;
	int rv;

	/* check setsockopt for SAVE_SYN */
	rv = bpf_map_lookup_elem(sock_map_fd, &key, &res);
	EXPECT_EQ(0, rv, "d");
	EXPECT_EQ(0, res, "d");
	key = 1;
	/* check getsockopt for SAVED_SYN */
	rv = bpf_map_lookup_elem(sock_map_fd, &key, &res);
	EXPECT_EQ(0, rv, "d");
	EXPECT_EQ(1, res, "d");
	return 0;
err:
	return -1;
}

static int bpf_find_map(const char *test, struct bpf_object *obj,
			const char *name)
{
	struct bpf_map *map;

	map = bpf_object__find_map_by_name(obj, name);
	if (!map) {
		printf("%s:FAIL:map '%s' not found\n", test, name);
		return -1;
	}
	return bpf_map__fd(map);
}

int main(int argc, char **argv)
{
	const char *file = "test_tcpbpf_kern.o";
	int prog_fd, map_fd, sock_map_fd;
	struct tcpbpf_globals g = {0};
	const char *cg_path = "/foo";
	int error = EXIT_FAILURE;
	struct bpf_object *obj;
	int cg_fd = -1;
	__u32 key = 0;
	int rv;

	if (setup_cgroup_environment())
		goto err;

	cg_fd = create_and_get_cgroup(cg_path);
	if (!cg_fd)
		goto err;

	if (join_cgroup(cg_path))
		goto err;

	if (bpf_prog_load(file, BPF_PROG_TYPE_SOCK_OPS, &obj, &prog_fd)) {
		printf("FAILED: load_bpf_file failed for: %s\n", file);
		goto err;
	}

	rv = bpf_prog_attach(prog_fd, cg_fd, BPF_CGROUP_SOCK_OPS, 0);
	if (rv) {
		printf("FAILED: bpf_prog_attach: %d (%s)\n",
		       error, strerror(errno));
		goto err;
	}

	if (system("./tcp_server.py")) {
		printf("FAILED: TCP server\n");
		goto err;
	}

	map_fd = bpf_find_map(__func__, obj, "global_map");
	if (map_fd < 0)
		goto err;

	sock_map_fd = bpf_find_map(__func__, obj, "sockopt_results");
	if (sock_map_fd < 0)
		goto err;

	rv = bpf_map_lookup_elem(map_fd, &key, &g);
	if (rv != 0) {
		printf("FAILED: bpf_map_lookup_elem returns %d\n", rv);
		goto err;
	}

	if (verify_result(&g)) {
		printf("FAILED: Wrong stats\n");
		goto err;
	}

	if (verify_sockopt_result(sock_map_fd)) {
		printf("FAILED: Wrong sockopt stats\n");
		goto err;
	}

	printf("PASSED!\n");
	error = 0;
err:
	bpf_prog_detach(cg_fd, BPF_CGROUP_SOCK_OPS);
	close(cg_fd);
	cleanup_cgroup_environment();
	return error;
}