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167 lines
4.3 KiB
167 lines
4.3 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (c) 2017 Facebook |
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*/ |
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#include <sys/resource.h> |
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#include <sys/socket.h> |
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#include <arpa/inet.h> |
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#include <stdint.h> |
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#include <assert.h> |
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#include <errno.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <bpf/bpf.h> |
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#include <bpf/libbpf.h> |
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static int map_fd[7]; |
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#define PORT_A (map_fd[0]) |
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#define PORT_H (map_fd[1]) |
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#define REG_RESULT_H (map_fd[2]) |
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#define INLINE_RESULT_H (map_fd[3]) |
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#define A_OF_PORT_A (map_fd[4]) /* Test case #0 */ |
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#define H_OF_PORT_A (map_fd[5]) /* Test case #1 */ |
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#define H_OF_PORT_H (map_fd[6]) /* Test case #2 */ |
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static const char * const test_names[] = { |
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"Array of Array", |
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"Hash of Array", |
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"Hash of Hash", |
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}; |
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#define NR_TESTS (sizeof(test_names) / sizeof(*test_names)) |
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static void check_map_id(int inner_map_fd, int map_in_map_fd, uint32_t key) |
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{ |
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struct bpf_map_info info = {}; |
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uint32_t info_len = sizeof(info); |
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int ret, id; |
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ret = bpf_obj_get_info_by_fd(inner_map_fd, &info, &info_len); |
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assert(!ret); |
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ret = bpf_map_lookup_elem(map_in_map_fd, &key, &id); |
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assert(!ret); |
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assert(id == info.id); |
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} |
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static void populate_map(uint32_t port_key, int magic_result) |
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{ |
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int ret; |
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ret = bpf_map_update_elem(PORT_A, &port_key, &magic_result, BPF_ANY); |
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assert(!ret); |
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ret = bpf_map_update_elem(PORT_H, &port_key, &magic_result, |
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BPF_NOEXIST); |
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assert(!ret); |
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ret = bpf_map_update_elem(A_OF_PORT_A, &port_key, &PORT_A, BPF_ANY); |
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assert(!ret); |
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check_map_id(PORT_A, A_OF_PORT_A, port_key); |
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ret = bpf_map_update_elem(H_OF_PORT_A, &port_key, &PORT_A, BPF_NOEXIST); |
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assert(!ret); |
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check_map_id(PORT_A, H_OF_PORT_A, port_key); |
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ret = bpf_map_update_elem(H_OF_PORT_H, &port_key, &PORT_H, BPF_NOEXIST); |
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assert(!ret); |
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check_map_id(PORT_H, H_OF_PORT_H, port_key); |
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} |
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static void test_map_in_map(void) |
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{ |
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struct sockaddr_in6 in6 = { .sin6_family = AF_INET6 }; |
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uint32_t result_key = 0, port_key; |
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int result, inline_result; |
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int magic_result = 0xfaceb00c; |
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int ret; |
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int i; |
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port_key = rand() & 0x00FF; |
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populate_map(port_key, magic_result); |
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in6.sin6_addr.s6_addr16[0] = 0xdead; |
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in6.sin6_addr.s6_addr16[1] = 0xbeef; |
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in6.sin6_port = port_key; |
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for (i = 0; i < NR_TESTS; i++) { |
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printf("%s: ", test_names[i]); |
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in6.sin6_addr.s6_addr16[7] = i; |
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ret = connect(-1, (struct sockaddr *)&in6, sizeof(in6)); |
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assert(ret == -1 && errno == EBADF); |
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ret = bpf_map_lookup_elem(REG_RESULT_H, &result_key, &result); |
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assert(!ret); |
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ret = bpf_map_lookup_elem(INLINE_RESULT_H, &result_key, |
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&inline_result); |
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assert(!ret); |
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if (result != magic_result || inline_result != magic_result) { |
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printf("Error. result:%d inline_result:%d\n", |
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result, inline_result); |
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exit(1); |
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} |
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bpf_map_delete_elem(REG_RESULT_H, &result_key); |
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bpf_map_delete_elem(INLINE_RESULT_H, &result_key); |
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printf("Pass\n"); |
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} |
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} |
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int main(int argc, char **argv) |
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{ |
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struct bpf_link *link = NULL; |
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struct bpf_program *prog; |
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struct bpf_object *obj; |
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char filename[256]; |
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snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); |
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obj = bpf_object__open_file(filename, NULL); |
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if (libbpf_get_error(obj)) { |
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fprintf(stderr, "ERROR: opening BPF object file failed\n"); |
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return 0; |
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} |
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prog = bpf_object__find_program_by_name(obj, "trace_sys_connect"); |
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if (!prog) { |
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printf("finding a prog in obj file failed\n"); |
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goto cleanup; |
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} |
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/* load BPF program */ |
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if (bpf_object__load(obj)) { |
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fprintf(stderr, "ERROR: loading BPF object file failed\n"); |
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goto cleanup; |
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} |
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map_fd[0] = bpf_object__find_map_fd_by_name(obj, "port_a"); |
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map_fd[1] = bpf_object__find_map_fd_by_name(obj, "port_h"); |
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map_fd[2] = bpf_object__find_map_fd_by_name(obj, "reg_result_h"); |
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map_fd[3] = bpf_object__find_map_fd_by_name(obj, "inline_result_h"); |
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map_fd[4] = bpf_object__find_map_fd_by_name(obj, "a_of_port_a"); |
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map_fd[5] = bpf_object__find_map_fd_by_name(obj, "h_of_port_a"); |
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map_fd[6] = bpf_object__find_map_fd_by_name(obj, "h_of_port_h"); |
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if (map_fd[0] < 0 || map_fd[1] < 0 || map_fd[2] < 0 || |
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map_fd[3] < 0 || map_fd[4] < 0 || map_fd[5] < 0 || map_fd[6] < 0) { |
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fprintf(stderr, "ERROR: finding a map in obj file failed\n"); |
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goto cleanup; |
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} |
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link = bpf_program__attach(prog); |
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if (libbpf_get_error(link)) { |
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fprintf(stderr, "ERROR: bpf_program__attach failed\n"); |
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link = NULL; |
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goto cleanup; |
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} |
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test_map_in_map(); |
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cleanup: |
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bpf_link__destroy(link); |
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bpf_object__close(obj); |
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return 0; |
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}
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