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25763b3c | 1 | // SPDX-License-Identifier: GPL-2.0-only |
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2 | /* |
3 | * Copyright (c) 2017 Facebook | |
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4 | */ |
5 | #include <sys/resource.h> | |
6 | #include <sys/socket.h> | |
7 | #include <arpa/inet.h> | |
8 | #include <stdint.h> | |
9 | #include <assert.h> | |
10 | #include <errno.h> | |
11 | #include <stdlib.h> | |
12 | #include <stdio.h> | |
2bf3e2ef | 13 | #include <bpf/bpf.h> |
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14 | #include "bpf_load.h" |
15 | ||
16 | #define PORT_A (map_fd[0]) | |
17 | #define PORT_H (map_fd[1]) | |
18 | #define REG_RESULT_H (map_fd[2]) | |
19 | #define INLINE_RESULT_H (map_fd[3]) | |
20 | #define A_OF_PORT_A (map_fd[4]) /* Test case #0 */ | |
21 | #define H_OF_PORT_A (map_fd[5]) /* Test case #1 */ | |
22 | #define H_OF_PORT_H (map_fd[6]) /* Test case #2 */ | |
23 | ||
24 | static const char * const test_names[] = { | |
25 | "Array of Array", | |
26 | "Hash of Array", | |
27 | "Hash of Hash", | |
28 | }; | |
29 | ||
30 | #define NR_TESTS (sizeof(test_names) / sizeof(*test_names)) | |
31 | ||
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32 | static void check_map_id(int inner_map_fd, int map_in_map_fd, uint32_t key) |
33 | { | |
34 | struct bpf_map_info info = {}; | |
35 | uint32_t info_len = sizeof(info); | |
36 | int ret, id; | |
37 | ||
38 | ret = bpf_obj_get_info_by_fd(inner_map_fd, &info, &info_len); | |
39 | assert(!ret); | |
40 | ||
41 | ret = bpf_map_lookup_elem(map_in_map_fd, &key, &id); | |
42 | assert(!ret); | |
43 | assert(id == info.id); | |
44 | } | |
45 | ||
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46 | static void populate_map(uint32_t port_key, int magic_result) |
47 | { | |
48 | int ret; | |
49 | ||
50 | ret = bpf_map_update_elem(PORT_A, &port_key, &magic_result, BPF_ANY); | |
51 | assert(!ret); | |
52 | ||
53 | ret = bpf_map_update_elem(PORT_H, &port_key, &magic_result, | |
54 | BPF_NOEXIST); | |
55 | assert(!ret); | |
56 | ||
57 | ret = bpf_map_update_elem(A_OF_PORT_A, &port_key, &PORT_A, BPF_ANY); | |
58 | assert(!ret); | |
a8744f25 | 59 | check_map_id(PORT_A, A_OF_PORT_A, port_key); |
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60 | |
61 | ret = bpf_map_update_elem(H_OF_PORT_A, &port_key, &PORT_A, BPF_NOEXIST); | |
62 | assert(!ret); | |
a8744f25 | 63 | check_map_id(PORT_A, H_OF_PORT_A, port_key); |
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64 | |
65 | ret = bpf_map_update_elem(H_OF_PORT_H, &port_key, &PORT_H, BPF_NOEXIST); | |
66 | assert(!ret); | |
a8744f25 | 67 | check_map_id(PORT_H, H_OF_PORT_H, port_key); |
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68 | } |
69 | ||
70 | static void test_map_in_map(void) | |
71 | { | |
72 | struct sockaddr_in6 in6 = { .sin6_family = AF_INET6 }; | |
73 | uint32_t result_key = 0, port_key; | |
74 | int result, inline_result; | |
75 | int magic_result = 0xfaceb00c; | |
76 | int ret; | |
77 | int i; | |
78 | ||
79 | port_key = rand() & 0x00FF; | |
80 | populate_map(port_key, magic_result); | |
81 | ||
82 | in6.sin6_addr.s6_addr16[0] = 0xdead; | |
83 | in6.sin6_addr.s6_addr16[1] = 0xbeef; | |
84 | in6.sin6_port = port_key; | |
85 | ||
86 | for (i = 0; i < NR_TESTS; i++) { | |
87 | printf("%s: ", test_names[i]); | |
88 | ||
89 | in6.sin6_addr.s6_addr16[7] = i; | |
90 | ret = connect(-1, (struct sockaddr *)&in6, sizeof(in6)); | |
91 | assert(ret == -1 && errno == EBADF); | |
92 | ||
93 | ret = bpf_map_lookup_elem(REG_RESULT_H, &result_key, &result); | |
94 | assert(!ret); | |
95 | ||
96 | ret = bpf_map_lookup_elem(INLINE_RESULT_H, &result_key, | |
97 | &inline_result); | |
98 | assert(!ret); | |
99 | ||
100 | if (result != magic_result || inline_result != magic_result) { | |
101 | printf("Error. result:%d inline_result:%d\n", | |
102 | result, inline_result); | |
103 | exit(1); | |
104 | } | |
105 | ||
106 | bpf_map_delete_elem(REG_RESULT_H, &result_key); | |
107 | bpf_map_delete_elem(INLINE_RESULT_H, &result_key); | |
108 | ||
109 | printf("Pass\n"); | |
110 | } | |
111 | } | |
112 | ||
113 | int main(int argc, char **argv) | |
114 | { | |
115 | struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; | |
116 | char filename[256]; | |
117 | ||
118 | assert(!setrlimit(RLIMIT_MEMLOCK, &r)); | |
119 | ||
120 | snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); | |
121 | ||
122 | if (load_bpf_file(filename)) { | |
123 | printf("%s", bpf_log_buf); | |
124 | return 1; | |
125 | } | |
126 | ||
127 | test_map_in_map(); | |
128 | ||
129 | return 0; | |
130 | } |