107 lines · c
1// SPDX-License-Identifier: GPL-2.02// Copyright (c) 2019 Isovalent, Inc.3 4#include <linux/bpf.h>5#include <linux/pkt_cls.h>6#include <string.h>7 8#include <bpf/bpf_helpers.h>9 10struct {11 __uint(type, BPF_MAP_TYPE_ARRAY);12 __uint(max_entries, 11);13 __type(key, __u32);14 __type(value, __u64);15} result_number SEC(".maps");16 17struct {18 __uint(type, BPF_MAP_TYPE_ARRAY);19 __uint(max_entries, 5);20 __type(key, __u32);21 const char (*value)[32];22} result_string SEC(".maps");23 24struct foo {25 __u8 a;26 __u32 b;27 __u64 c;28};29 30struct {31 __uint(type, BPF_MAP_TYPE_ARRAY);32 __uint(max_entries, 5);33 __type(key, __u32);34 __type(value, struct foo);35} result_struct SEC(".maps");36 37/* Relocation tests for __u64s. */38static __u64 num0;39static __u64 num1 = 42;40static const __u64 num2 = 24;41static __u64 num3 = 0;42static __u64 num4 = 0xffeeff;43static const __u64 num5 = 0xabab;44static const __u64 num6 = 0xab;45 46/* Relocation tests for strings. */47static const char str0[32] = "abcdefghijklmnopqrstuvwxyz";48static char str1[32] = "abcdefghijklmnopqrstuvwxyz";49static char str2[32];50 51/* Relocation tests for structs. */52static const struct foo struct0 = {53 .a = 42,54 .b = 0xfefeefef,55 .c = 0x1111111111111111ULL,56};57static struct foo struct1;58static const struct foo struct2;59static struct foo struct3 = {60 .a = 41,61 .b = 0xeeeeefef,62 .c = 0x2111111111111111ULL,63};64 65#define test_reloc(map, num, var) \66 do { \67 __u32 key = num; \68 bpf_map_update_elem(&result_##map, &key, var, 0); \69 } while (0)70 71SEC("tc")72int load_static_data(struct __sk_buff *skb)73{74 static const __u64 bar = ~0;75 76 test_reloc(number, 0, &num0);77 test_reloc(number, 1, &num1);78 test_reloc(number, 2, &num2);79 test_reloc(number, 3, &num3);80 test_reloc(number, 4, &num4);81 test_reloc(number, 5, &num5);82 num4 = 1234;83 test_reloc(number, 6, &num4);84 test_reloc(number, 7, &num0);85 test_reloc(number, 8, &num6);86 87 test_reloc(string, 0, str0);88 test_reloc(string, 1, str1);89 test_reloc(string, 2, str2);90 str1[5] = 'x';91 test_reloc(string, 3, str1);92 __builtin_memcpy(&str2[2], "hello", sizeof("hello"));93 test_reloc(string, 4, str2);94 95 test_reloc(struct, 0, &struct0);96 test_reloc(struct, 1, &struct1);97 test_reloc(struct, 2, &struct2);98 test_reloc(struct, 3, &struct3);99 100 test_reloc(number, 9, &struct0.c);101 test_reloc(number, 10, &bar);102 103 return TC_ACT_OK;104}105 106char _license[] SEC("license") = "GPL";107